Bolts Nuts Washers

7/29/2019 Bolts Nuts Washers

1/17

1 of 4

Headed Parts

Square Bolt

A

BLR

H

C

6 in. and

Shor te r Ove r 6 in.

Nom. Nom.

1/4 0.260 0.237 0.375 0.362 0.530 0.498 0.172 0.188 0.156 0.030 0.010 0.750 1.000

5/16 0.324 0.298 0.500 0.484 0.707 0.665 2.078 0.220 0.186 0.030 0.010 0.875 1.125

3/8 0.388 0.360 0.563 0.544 0.795 0.747 0.250 0.268 0.232 0.030 0.010 1.000 1.250

7/16 0.452 0.421 0.625 0.603 0.884 0.828 0.297 0.316 0.278 0.030 0.010 1.125 1.375

1/2 0.515 0.482 0.750 0.725 1.061 0.995 0.328 0.348 0.308 0.030 0.010 1.250 1.500

5/8 0.642 0.605 0.938 0.906 1.326 1.244 0.422 0.444 0.400 0.060 0.020 1.500 1.750

3/4 0.768 0.729 1.125 1.088 1.591 1.494 0.500 0.524 0.476 0.060 0.020 1.750 2.000

7/8 0.895 0.852 1.313 1.269 1.856 1.742 0.594 0.620 0.568 0.060 0.020 2.000 2.250

1 1.022 0.976 1.500 1.450 2.121 1.991 0.656 0.684 0.628 0.090 0.030 2.250 2.500

1 1/8 1.149 1.098 1.688 1.631 2.386 2.239 0.750 0.780 0.720 0.090 0.030 2.500 2.750

1 1/4 1.277 1.223 1.875 1.812 2.652 2.489 0.844 0.876 0.812 0.090 0.030 2.750 3.000

1 3/8 1.404 1.345 2.063 1.994 2.917 2.738 0.906 0.940 0.872 0.090 0.030 3.000 3.250

1 1/2 1.531 1.470 2.250 2.175 3.182 2.986 1.000 1.036 0.964 0.090 0.030 3.250 3.500

Max MinMax Min

Basic and

Max Min Max Basic

Full Size Body Diameter Width Across CornersWidth Across Flats Head Height Radius of Fillet

Thread Length for Bolt

Lengths

L

Nominal

Size

Max Min

A B C H R

Min


2/17

2 of 4

6 in. and

Shor te r Ove r 6 in.

Nom. Nom.

1/4 0.260 0.237 0.438 0.425 0.505 0.484 0.172 0.188 0.150 0.030 0.010 0.750 1.000

5/16 0.324 0.298 0.500 0.484 0.577 0.552 0.219 0.235 0.195 0.030 0.010 0.875 1.125

3/8 0.388 0.360 0.562 0.544 0.650 0.620 0.250 0.268 0.226 0.030 0.010 1.000 1.250

7/16 0.452 0.421 0.625 0.603 0.722 0.687 0.297 0.316 0.272 0.030 0.010 1.125 1.375

1/2 0.515 0.482 0.750 0.725 0.866 0.826 0.344 0.364 0.302 0.030 0.010 1.250 1.500

5/8 0.642 0.605 0.938 0.906 1.083 1.033 0.422 0.444 0.378 0.060 0.020 1.500 1.7503/4 0.768 0.729 1.125 1.088 1.299 1.240 0.500 0.524 0.455 0.060 0.020 1.750 2.000

7/8 0.895 0.852 1.312 1.269 1.516 1.447 0.578 0.604 0.531 0.060 0.020 2.000 2.250

1 1.022 0.976 1.500 1.450 1.732 1.653 0.672 0.700 0.591 0.090 0.030 2.250 2.500

1 1/8 1.149 1.098 1.688 1.631 1.949 1.859 0.750 0.780 0.658 0.090 0.030 2.500 2.750

1 1/4 1.277 1.223 1.875 1.812 2.165 2.066 0.844 0.876 0.749 0.090 0.030 2.750 3.000

1 3/8 1.404 1.345 2.062 1.994 2.382 2.273 0.906 0.940 0.810 0.090 0.030 3.000 3.250

1 1/2 1.531 1.470 2.250 2.175 2.598 2.480 1.000 1.036 0.902 0.090 0.030 3.250 3.500

1 3/4 1.785 1.716 2.625 2.538 3.031 2.893 1.156 1.196 1.054 0.120 0.040 3.750 4.000

2 2.039 1.964 3.000 2.900 3.464 3.306 1.344 1.388 1.175 0.120 0.040 4.250 4.500

2 1/4 2.305 2.214 3.375 3.262 3.897 3.719 1.500 1.548 1.327 0.190 0.060 2.750 5.000

2 1/2 2.559 2.461 3.750 3.625 4.330 4.133 1.656 1.708 1.479 0.190 0.060 5.250 5.500

2 3/4 2.827 2.711 4.125 3.988 4.763 4.546 1.813 1.869 1.632 0.190 0.060 5.750 6.000

3 3.081 2.961 4.500 4.350 5.196 4.959 2.000 2.060 1.815 0.190 0.060 6.250 6.5003 1/4 3.335 3.210 4.875 4.712 5.629 5.372 2.188 2.251 1.936 0.190 0.060 6.750 7.000

3 1/2 3.589 3.461 5.250 5.075 6.062 5.786 2.313 2.380 2.057 0.190 0.060 7.250 7.500

3 3/4 3.858 3.726 5.625 5.437 6.495 6.198 2.500 2.572 2.241 0.190 0.060 7.750 8.000

4 4.111 3.975 6.000 5.800 6.928 6.612 2.688 2.764 2.424 0.190 0.060 8.250 8.800

Nominal

Size

Full Size Body Diameter Width Across Flats Width Across Corners

A B C

Head Height Radius of Fillet

Thread Length for Bolt

Lengths

Max Min

Basic and

Max Min Max Min Basic

H R L

Max Min Max Min

Hex Bolt

A

B

LR

H

C


3/17

3 of 4

Width

Across

Corners

Head

Height

Wrenching

Height

Flange

Thickness

Chamfer

(Radius)

Thread

Length

Transion

Thread

Length

Max Min Max Min Min Max Min Min Max Basic Max

E G H J K X LT Y

1/4 0.244 0.375 0.365 0.252 0.244 0.278 0.260 0.150 0.058 0.020 1.000 0.250

5/16 0.305 0.469 0.457 0.315 0.306 0.348 0.312 0.180 0.074 0.020 1.125 0.280

3/8 0.368 0.562 0.550 0.377 0.368 0.420 0.375 0.210 0.095 0.020 1.250 0.310

7/16 0.429 0.656 0.642 0.438 0.429 0.489 0.438 0.260 0.109 0.030 1.375 0.360

1/2 0.492 0.750 0.735 0.502 0.493 0.562 0.500 0.290 0.129 0.030 1.500 0.380

9/16 0.554 0.844 0.828 0.564 0.555 0.633 0.563 0.330 0.145 0.030 1.625 0.420

5/8 0.616 0.938 0.921 0.627 0.618 0.705 0.625 0.360 0.166 0.040 1.750 0.460

3/4 0.741 1.125 1.107 0.725 0.743 0.847 0.750 0.440 0.200 0.040 2.000 0.500

7/8 0.865 1.312 1.293 0.877 0.866 0.987 0.875 0.510 0.234 0.040 2.250 0.560

1 0.989 1.500 1.479 1.003 0.991 1.130 1.000 0.600 0.268 0.040 2.500 0.620

1 1/8 1.109 1.688 1.665 1.128 1.115 1.271 1.125 0.660 0.310 0.050 2.750 0.710

1 1/4 1.234 1.875 1.852 1.253 1.240 1.414 1.250 0.730 0.350 0.050 3.000 0.710

1 3/8 1.357 2.062 2.038 1.378 1.365 1.556 1.375 0.800 0.392 0.050 3.250 0.830

1 1/2 1.482 2.250 2.224 1.503 1.489 1.697 1.500 0.870 0.433 0.050 3.500 0.830

Nominal

Size F

Body

Diameter

Flange Diameter

C

Width Across Flats

Flange 12 Point Screw

Y

L

L T

J

K

30X

E

G

F

H

C


4/17

4 of 4

Chamfer

(Radius)

Hexagon

Socket Size

Key

Engagement

Wall

Thickness

Chamfer

(Radius)

Max Min Max Min Max Min Max Nom. Min Min Max

C J T G K

0 (0.060) 0.060 0.057 0.096 0.091 0.060 0.057 0.004 0.050 0.025 0.020 0.007

1 (0.073) 0.073 0.070 0.118 0.112 0.073 0.070 0.005 0.063 0.031 0.025 0.007

2 (0.086) 0.086 0.082 0.140 0.134 0.086 0.083 0.008 0.078 0.038 0.029 0.007

3 (0.099) 0.099 0.095 0.161 0.154 0.099 0.095 0.008 0.078 0.044 0.034 0.0074 (0.112) 0.112 0.108 0.183 0.176 0.112 0.108 0.009 0.094 0.051 0.038 0.008

5 (0.125) 0.125 0.120 0.205 0.198 0.125 0.121 0.012 0.094 0.057 0.043 0.008

6 (0.138) 0.138 0.133 0.226 0.218 0.138 0.134 0.013 0.109 0.064 0.047 0.008

8 (0.164) 0.164 0.159 0.270 0.262 0.164 0.159 0.014 0.141 0.077 0.056 0.008

10 (0.190) 0.190 0.184 0.312 0.303 0.190 0.185 0.018 0.156 0.090 0.065 0.008

1/4 0.250 0.244 0.375 0.365 0.250 0.244 0.025 0.188 0.120 0.095 0.010

5/16 0.313 0.305 0.469 0.457 0.312 0.306 0.033 0.250 0.151 0.119 0.010

3/8 0.375 0.368 0.562 0.550 0.375 0.368 0.040 0.313 0.182 0.143 0.010

7/16 0.438 0.429 0.656 0.642 0.438 0.430 0.047 0.375 0.213 0.166 0.015

1/2 0.500 0.492 0.750 0.735 0.500 0.492 0.055 0.375 0.245 0.190 0.015

5/8 0.625 0.616 0.938 0.921 0.625 0.616 0.070 0.500 0.307 0.238 0.015

3/4 0.750 0.741 1.125 1.107 0.750 0.740 0.085 0.625 0.370 0.285 0.015

7/8 0.875 0.865 1.312 1.293 0.875 0.864 0.100 0.750 0.432 0.333 0.020

1 1.000 0.989 1.500 1.479 1.000 0.988 0.114 0.750 0.495 0.380 0.020

1 1/8 1.125 1.109 1.688 1.665 1.125 1.111 0.129 0.875 0.557 0.428 0.020

1 1/4 1.250 1.234 1.875 1.852 1.250 1.236 0.144 0.875 0.620 0.475 0.020

1 3/8 1.375 1.357 2.062 2.038 1.375 1.360 0.160 1.000 0.682 0.523 0.020

1 1/2 1.500 1.482 2.250 2.224 1.500 1.485 0.176 1.000 0.745 0.570 0.020

1 3/4 1.750 1.730 2.625 2.597 1.750 1.734 0.200 1.250 0.870 0.665 0.020

2 2.000 1.978 3.000 2.970 2.000 1.983 0.238 1.500 0.995 0.760 0.020

2 1/4 2.250 2.228 3.375 3.344 2.250 2.232 0.269 1.750 1.120 0.855 0.036

2 1/2 2.500 2.476 3.750 3.717 2.500 2.481 0.300 1.750 1.245 0.950 0.036

2 3/4 2.750 2.726 4.125 4.090 2.750 2.730 0.332 2.000 1.370 1.045 0.036

3 3.000 2.976 4.500 4.464 0.300 3.979 0.363 2.250 1.495 1.140 0.036

3 1/4 3.250 3.226 4.875 4.837 3.250 3.228 0.394 2.250 1.620 1.235 0.036

3 1/2 3.500 3.476 5.250 5.211 3.500 3.478 0.426 2.750 1.745 1.330 0.036

3 3/4 3.750 3.726 5.625 5.584 3.750 3.727 0.458 2.750 1.870 1.425 0.036

4 4.000 3.976 6.000 5.958 4.000 3.976 0.489 3.000 1.995 1.520 0.036

Nominal Size

(Basic Screw

Diameter)

Body Diameter Head Diameter Head Height

HAD

Hexagon Socket Head Cap Screw

J

T

S

D

G

F

A

H

C


5/17

1 of 4

Studs

Double End Stud

B C B C

Max Min Max Min

Min Full

Thread

Max Total

Thread

Min Full

Thread

Max Total

Thread

1/4 0.250 0.213 0.250 0.241 0.750 0.875 1.000 1.125

5/16 0.313 0.271 0.313 0.303 0.875 1.031 1.125 1.281

3/8 0.375 0.328 0.375 0.365 1.000 1.188 1.250 1.4387/16 0.438 0.385 0.438 0.426 1.125 1.344 1.375 1.594

1/2 0.500 0.444 0.500 0.488 1.250 1.500 1.500 1.750

9/16 0.563 0.502 0.563 0.550 1.375 1.656 1.625 1.906

5/8 0.625 0.559 0.625 0.611 1.500 1.812 1.750 2.062

3/4 0.750 0.677 0.750 0.735 1.750 2.125 2.000 2.375

7/8 0.875 0.795 0.875 0.859 2.000 2.438 2.250 2.688

1 1.000 0.910 1.000 0.983 2.250 2.750 2.500 3.000

1 1/8 1.125 1.023 1.125 1.106 2.500 3.062 2.750 3.312

1 1/4 1.250 1.148 1.250 1.231 2.750 3.375 3.000 3.625

1 3/8 1.375 1.256 1.375 1.354 3.000 3.688 3.250 3.928

1 1/2 1.500 1.381 1.500 1.479 3.250 4.000 3.500 4.250

Thread Length for Studs

> 6" Length

Nut Ends

Nominal

Size

Thread Length For

Studs


6/17

2 of 4

150 FlangeLength of StudBolts [Note (1)]

NPS

OutsideDiameterof Flange

Diameterof BoltCircle

Diameterof BoltHoles

Numberof Bolts

Diameterof Bolts

RaisedFace

0.06 inRingJoint

1/2 3 1/2 2 3/8 5/8 4 1/2 2 1/4 -

3/4 3 7/8 2 3/4 5/8 4 1/2 2 1/2 -

1 4 1/4 3 1/8 5/8 4 1/2 2 1/2 3

1 1/4 4 5/8 3 1/2 5/8 4 1/2 2 3/4 3 1/4

1 1/2 5 3 7/8 5/8 4 1/2 2 3/4 3 1/4

2 6 4 3/4 3/4 4 5/8 3 1/4 3 3/4

2 1/2 7 5 1/2 3/4 4 5/8 3 1/2 4

3 7 1/2 6 3/4 4 5/8 3 1/2 4

3 1/2 8 1/2 7 3/4 8 5/8 3 1/2 4

4 9 7 1/2 3/4 8 5/8 3 1/2 4

5 10 8 1/2 7/8 8 3/4 3 3/4 4 1/4

6 11 9 1/2 7/8 8 3/4 4 4 1/2

8 13 1/2 11 3/4 7/8 8 3/4 4 1/4 4 3/4

10 16 14 3/4 1 12 7/8 4 1/2 5

12 19 17 1 12 7/8 4 3/4 5 1/4

14 21 18 3/4 1 1/8 12 1 5 1/4 5 3/4

16 23 1/2 21 1/4 1 1/8 16 1 5 1/4 5 3/4

18 25 22 3/4 1 1/4 16 1 1/8 5 3/4 6 1/4

20 27 1/2 25 1 1/4 20 1 1/8 6 1/4 6 3/4

24 32 29 1/2 1 1/4 20 1 1/4 6 3/4 7 1/4


NPS




Numberof Bolts

Diameterof Bolts

RaisedFace

0.06 inRingJoint

1/2 3 3/4 2 5/8 5/8 4 1/2 2 1/2 3

3/4 4 5/8 3 1/4 3/4 4 5/8 3 3 1/2

1 4 7/8 3 1/2 3/4 4 5/8 3 3 1/2

1 1/4 5 1/4 3 7/8 3/4 4 5/8 3 1/4 3 3/4

1 1/2 6 1/8 4 1/2 7/8 4 3/4 3 1/2 4

2 6 1/2 5 3/4 8 5/8 3 1/2 4

2 1/2 7 1/2 5 7/8 7/8 8 3/4 4 4 1/2

3 8 1/4 6 5/8 7/8 8 3/4 4 1/4 4 3/4

3 1/2 9 7 1/4 7/8 8 3/4 4 1/4 5

4 10 7 7/8 7/8 8 3/4 4 1/2 5

5 11 9 1/4 7/8 8 3/4 4 3/4 5 1/4

6 12 1/2 10 5/8 7/8 12 3/4 4 3/4 5 1/2

8 15 13 1 12 7/8 5 1/2 6

10 17 1/2 15 1/4 1 1/8 16 1 6 1/4 6 3/4

12 20 1/2 17 3/4 1 1/4 16 1 1/8 6 3/4 7 1/4

14 23 20 1/4 1 1/4 20 1 1/8 7 7 1/2

16 25 1/2 22 1/2 1 3/8 20 1 1/4 7 1/2 8

18 28 24 3/4 1 3/8 24 1 1/4 7 3/4 8 1/4

20 30 1/2 27 1 3/8 24 1 1/4 8 8 3/4

24 36 32 1 5/8 24 1 1/2 9 10


7/17

3 of 4


NPS




Numberof Bolts

Diameterof Bolts

RaisedFace

0.06 inRingJoint

1/2 3 3/4 2 5/8 5/8 4 1/2 3 3

3/4 4 5/8 3 1/4 3/4 4 5/8 3 1/2 3 1/2

1 4 7/8 3 1/2 3/4 4 5/8 3 1/2 3 1/2

1 1/4 5 1/4 3 7/8 3/4 4 5/8 3 3/4 3 3/4

1 1/2 6 1/8 4 1/2 7/8 4 3/4 4 1/4 4 1/4

2 6 1/2 5 3/4 8 5/8 4 1/4 4 1/4

2 1/2 7 1/2 5 7/8 7/8 8 3/4 4 3/4 4 3/4

3 8 1/4 6 5/8 7/8 8 3/4 5 5

3 1/2 9 7 1/4 1 8 7/8 5 1/2 5 1/2

4 10 3/4 8 1/2 1 8 7/8 5 3/4 5 3/4

5 13 10 1/2 1 1/8 8 1 6 1/2 6 1/2

6 14 11 1/2 1 1/8 12 1 6 3/4 6 3/4

8 16 1/2 13 3/4 1 1/4 12 1 1/8 7 1/2 7 3/4

10 20 17 1 3/8 16 1 1/4 8 1/2 8 1/2

12 22 19 1/4 1 3/8 20 1 1/4 8 3/4 8 3/4

14 23 3/4 20 3/4 1 1/2 20 1 3/8 9 1/4 9 1/4

16 27 23 3/4 1 5/8 20 1 1/2 10 10

18 29 1/4 25 3/4 1 3/4 20 1 5/8 10 3/4 10 3/4

20 32 28 1/2 1 3/4 24 1 5/8 11 1/4 11 1/2

24 37 33 2 24 1 7/8 13 13 1/4


NPS




Numberof Bolts

Diameterof Bolts

RaisedFace

0.06 inRingJoint

1/2 4 3/4 3 1/4 7/8 4 3/4 4 1/4 4 1/4

3/4 5 1/8 3 1/2 7/8 4 3/4 4 1/2 4 1/2

1 5 7/8 4 1 4 7/8 5 5

1 1/4 6 1/4 4 3/8 1 4 7/8 5 5

1 1/2 7 4 7/8 1 1/8 4 1 5 1/2 5 1/22 8 1/2 6 1/2 1 8 7/8 5 3/4 5 3/4

2 1/2 9 5/8 7 1/2 1 1/8 8 1 6 1/4 6 1/4

3 9 1/2 7 1/2 1 8 7/8 5 3/4 5 3/4

4 11 1/2 9 1/4 1 1/4 8 1 1/8 6 3/4 6 3/4

5 13 3/4 11 1 3/8 8 1 1/4 7 1/2 7 1/2

6 15 12 1/2 1 1/4 12 1 1/8 7 1/2 7 3/4

8 18 1/2 15 1/2 1 1/2 12 1 3/8 8 3/8 8 3/4

10 21 1/2 18 1/2 1 1/2 16 1 3/8 9 1/4 9 1/4

12 24 21 1 1/2 20 1 3/8 10 10

14 25 1/4 22 1 5/8 20 1 1/2 10 3/4 11

16 27 3/4 24 1/4 1 3/4 20 1 5/8 11 1/4 11 1/2

18 31 27 2 20 1 7/8 12 3/4 13 1/420 33 3/4 29 1/2 2 1/8 20 2 13 3/4 14 1/4

24 41 35 1/2 2 5/8 20 2 1/2 17 1/4 18


8/17

4 of 4


NPS




Numberof Bolts

Diameterof Bolts

RaisedFace

0.06 inRingJoint

1/2 4 3/4 3 1/4 7/8 4 3/4 4 1/4 4 1/4

3/4 5 1/8 3 1/2 7/8 4 3/4 4 1/2 4 1/2

1 5 7/8 4 1 4 7/8 5 5

1 1/4 6 1/4 4 3/8 1 4 7/8 5 5

1 1/2 7 4 7/8 1 1/8 4 1 5 1/2 5 1/22 8 1/2 6 1/2 1 8 7/8 5 3/4 5 3/4

2 1/2 9 5/8 7 1/2 1 1/8 8 1 6 1/4 6 1/4

3 10 1/2 8 1 1/4 8 1 1/8 7 7

4 12 1/4 9 1/2 1 3/8 8 1 1/4 7 3/4 7 3/4

5 14 3/4 11 1/2 1 5/8 8 1 1/2 9 3/4 9 3/4

6 15 1/2 12 1/2 1 1/2 12 1 3/8 10 1/4 10 1/2

8 19 15 1/2 1 3/4 12 1 5/8 11 1/2 12 3/4

10 23 19 2 12 1 7/8 13 1/4 13 1/2

12 26 1/2 22 1/2 2 1/8 16 2 14 3/4 15 1/4

14 29 1/2 25 2 3/8 16 2 1/4 16 16 3/4

16 32 1/2 27 3/4 2 5/8 16 2 1/2 17 1/2 18 1/2

18 36 30 1/2 2 7/8 16 2 3/4 19 1/2 20 3/420 38 3/4 32 3/4 3 1/8 16 3 21 1/4 22 1/4

24 46 39 3 5/8 16 3 1/2 24 1/4 25 1/2

Length Measurement UsedNon-Standard LengthStud Bolt

Point Point

Standard LengthStud Bolt

Length Measurement Used

Note: (1) All studs are measured using eecve thread length whichis rst thread to rst thread. See diagrams to the right.Dimensions are in inches. Measurements based on ASME B 16.5

ange specicaons.

Note:(2) Length of point on studs and stud bolts shall be not lessthan one nor more than two complete threads as measured from theextreme end parallel to the axis. (Typically 1/8)


9/17

1 of 5

Nuts

Square Nut

Basic &

Max Min Max Min Basic Max Min

1/4 0.438 0.425 0.619 0.554 0.219 0.235 0.203

5/16 0.562 0.547 0.795 0.721 0.266 0.283 0.249

3/8 0.625 0.606 0.884 0.802 0.328 0.346 0.310

7/16 0.750 0.728 1.061 0.970 0.375 0.394 0.356

1/2 0.812 0.788 1.149 1.052 0.438 0.458 0.418

5/8 1.000 0.969 1.414 1.300 0.547 0.569 0.525

3/4 1.125 1.088 1.591 1.464 0.656 0.680 0.632

7/8 1.315 1.269 1.856 1.712 0.766 0.792 0.740

1 1.500 1.450 2.121 1.961 0.875 0.903 0.847

1 1/8 1.688 1.631 2.386 2.209 1.000 1.030 0.970

1 1/4 1.875 1.812 2.652 2.458 1.094 1.126 1.062

1 3/8 2.062 1.994 2.917 2.708 1.203 1.237 1.169

1 1/2 2.250 2.175 3.182 2.956 1.313 1.348 1.276

A B H

Nominal

Size

Width Across Flats Width Across Corners Thickness

A

B

25

H


10/17

2 of 5

Hex Nut and Hex Jam Nut

Basic and

Max Min Max Min Basic Max Min Basic Max Min

1/4 0.438 0.428 0.505 0.488 0.219 0.226 0.212 0.156 0.163 0.150

5/16 0.500 0.489 0.577 0.557 0.266 0.273 0.258 0.188 0.195 0.180

3/8 0.562 0.551 0.650 0.628 0.328 0.337 0.320 0.219 0.227 0.210

7/16 0.688 0.675 0.794 0.768 0.375 0.385 0.365 0.250 0.260 0.240

1/2 0.750 0.736 0.866 0.840 0.438 0.448 0.427 0.313 0.323 0.302

9/16 0.875 0.861 1.010 0.982 0.484 0.496 0.473 0.313 0.324 0.301

5/8 0.938 0.922 1.083 1.051 0.547 0.559 0.535 0.375 0.387 0.363

3/4 1.125 1.088 1.299 1.240 0.641 0.665 0.617 0.422 0.446 398.000

7/8 1.312 1.263 1.516 1.447 0.750 0.776 0.724 0.484 0.510 0.4581 1.500 1.450 1.732 1.653 0.859 0.887 0.831 0.547 0.575 0.519

1 1/8 1.688 1.631 1.949 1.859 0.969 0.999 0.939 0.609 0.639 0.579

1 1/4 1.875 1.812 2.165 2.066 1.063 1.094 1.030 0.719 0.751 0.687

1 3/8 2.063 1.994 2.382 2.273 1.172 1.206 1.138 0.781 0.815 0.747

1 1/2 2.250 2.175 2.598 2.480 1.281 1.317 1.245 0.844 0.880 0.808

Nominal

Size

Widt h Across Flat s Widt h Across Corne rs He x N ut Thickne ss

H1

Hex Jam Nut Thickness

A B H

A

B

H H1

0.016 Approx.0.016 Approx.


11/17

3 of 5

Hex Sloed Nut

Basic and

Max Min Max Min Basic Max Min Max Min

1/4 0.438 0.428 0.505 0.488 0.219 0.226 0.212 0.100 0.070

5/16 0.500 0.489 0.577 0.557 0.266 0.273 0.258 0.120 0.090

3/8 0.563 0.551 0.650 0.628 0.328 0.337 0.320 0.150 0.120

7/16 0.688 0.675 0.794 0.768 0.375 0.385 0.365 0.150 0.120

1/2 0.750 0.736 0.866 0.840 0.438 0.448 0.427 0.180 0.150

9/16 0.875 0.861 1.010 0.982 0.484 0.496 0.473 0.180 0.150

5/8 0.938 0.922 1.083 1.051 0.547 0.559 0.535 0.240 0.180

3/4 1.125 1.088 1.299 1.240 0.641 0.665 0.617 0.240 0.180

7/8 1.313 1.269 1.516 1.447 0.750 0.776 0.724 0.240 0.1801 1.500 1.450 1.732 1.653 0.859 0.887 0.831 0.300 0.240

1 1/8 1.688 1.631 1.949 1.859 0.969 0.999 0.939 0.330 0.240

1 1/4 1.875 1.812 2.165 2.066 1.063 1.094 1.030 0.400 0.310

1 3/8 2.063 1.994 2.382 2.273 1.172 1.206 1.138 0.400 0.310

1 1/2 2.250 2.175 2.598 2.480 1.281 1.317 1.245 0.460 0.370

S

Nominal

Size A B H

Width Across Flats Width Across Corners Thickness Width of Slot

B

AH

S

0.016 Approx.


12/17

4 of 5

Hex Coupling Nut

Basic and

Max Min Max Min Basic Max Min

1/4 0.375 0.365 0.433 0.416 0.750 0.760 0.740

5/16 0.500 0.489 0.577 0.557 0.938 0.950 0.9303/8 0.563 0.551 0.650 0.628 1.125 1.130 1.110

7/16 0.688 0.675 0.794 0.769 1.313 1.320 1.300

1/2 0.750 0.736 0.866 0.839 1.500 1.510 1.490

9/16 0.875 0.861 1.010 0.981 1.688 1.700 1.670

5/8 0.938 0.922 1.083 1.051 1.875 1.890 1.860

3/4 1.125 1.088 1.299 1.240 2.250 2.270 2.220

7/8 1.312 1.269 1.516 1.447 2.625 2.650 2.600

1 1.500 1.450 1.732 1.653 3.000 3.030 2.970

1 1/8 1.688 1.631 1.949 1.859 3.375 3.400 3.340

1 1/4 1.875 1.812 2.165 2.066 3.750 3.780 3.710

1 3/8 2.062 1.994 2.382 2.273 4.125 4.160 4.090

1 1/2 2.250 2.175 2.598 2.480 4.500 4.540 4.460

1 5/8 2.562 2.481 2.959 2.828 4.875 4.910 4.8301 3/4 2.750 2.662 3.175 3.035 5.250 5.290 5.210

1 7/8 2.938 2.844 3.392 3.242 5.625 5.670 5.580

2 3.125 3.025 3.608 3.448 6.000 6.040 5.950

2 1/4 3.500 3.388 4.041 3.862 6.750 6.800 6.700

2 1/2 3.875 3.750 4.474 4.275 7.500 7.550 7.440

2 3/4 4.250 4.112 4.907 4.688 8.250 8.310 8.190

3 4.625 4.475 5.340 5.101 9.000 9.060 8.940

3 1/4 5.000 4.838 5.773 5.515 9.750 9.810 9.600

3 1/2 5.375 5.500 6.206 5.928 10.500 10.570 10.430

3 3/4 5.750 5.562 6.639 6.340 11.250 11.320 11.170

4 6.125 5.925 7.072 3.754 12.000 12.080 11.920

4 1/4 6.500 6.288 7.506 7.168 12.750 12.830 12.670

4 1/2 6.875 6.650 7.939 7.581 13.500 13.580 13.420

4 3/4 7.250 7.012 8.372 7.994 14.250 14.340 14.160

5 7.625 7.375 8.805 8.408 15.000 15.090 14.910

5 1/4 8.000 7.738 9.238 8.821 15.750 15.850 15.650

5 1/2 8.375 8.100 9.671 9.234 16.500 16.600 16.400

5 3/4 8.750 8.462 10.104 9.647 17.250 17.350 17.150

6 9.125 8.825 10.537 10.060 18.000 18.110 17.890

Thickness

H

Nominal

Size

Width Across Flats

A B

Width Across Corners

B

A

H

0.5 H


13/17

5 of 5

Type A Wing Nut

Max Min Max Min Max Min Max Min Max Min Max Min

0.099 48 and 56 Heavy AA 0.720 0.590 0.410 0.280 0.110 0.070 0.210 0.170 0.330 0.290 0.140 0.100

0.112 40 and 48 Heavy AA 0.720 0.590 0.410 0.280 0.110 0.070 0.210 0.170 0.330 0.290 0.140 0.100

Light AA 0.720 0.590 0.410 0.280 0.110 0.070 0.210 0.170 0.330 0.290 0.140 0.100

Heavy A 0.910 0.780 0.470 0.340 0.140 0.100 0.270 0.220 0.430 0.390 0.180 0.140

Light AA 0.720 0.590 0.410 0.280 0.110 0.070 0.210 0.170 0.330 0.290 0.140 0.100

Heavy A 0.910 0.780 0.470 0.340 0.140 0.100 0.270 0.220 0.430 0.390 0.180 0.140

Light A 0.910 0.780 0.470 0.340 0.140 0.100 0.270 0.220 0.430 0.390 0.180 0.140

Heavy B 1.100 0.970 0.570 0.430 0.180 0.140 0.330 0.260 0.500 0.450 0.220 0.170

Light A 0.910 0.780 0.470 0.340 0.140 0.100 0.270 0.220 0.430 0.390 0.180 0.140

Heavy B 1.100 0.970 0.570 0.430 0.180 0.140 0.330 0.260 0.500 0.450 0.220 0.170

Light B 1.100 0.970 0.570 0.430 0.180 0.140 0.330 0.260 0.500 0.450 0.220 0.170

Heavy C 1.250 1.120 0.660 0.530 0.210 0.170 0.390 0.320 0.580 0.510 0.250 0.200Light B 1.100 0.970 0.570 0.430 0.180 0.140 0.330 0.260 0.500 0.450 0.220 0.170

Regular C 1.250 1.120 0.660 0.530 0.210 0.170 0.390 0.320 0.580 0.510 0.250 0.200

Heavy D 1.440 1.310 0.790 0.650 0.240 0.200 0.480 0.420 0.700 0.640 0.300 0.260

Light C 1.250 1.120 0.660 0.530 0.210 0.170 0.390 0.320 0.580 0.510 0.250 0.200

Regular D 1.440 1.310 0.790 0.650 0.240 0.200 0.480 0.420 0.700 0.640 0.300 0.260

Heavy E 1.940 1.810 1.000 0.870 0.330 0.260 0.650 0.540 0.930 0.860 0.390 0.350

Light D 1.440 1.310 0.790 0.650 0.240 0.200 0.480 0.420 0.700 0.640 0.300 0.260

Regular E 1.940 1.810 1.000 0.870 0.330 0.260 0.650 0.540 0.930 0.860 0.390 0.350

Light E 1.940 1.810 1.000 0.870 0.330 0.260 0.650 0.540 0.930 0.860 0.390 0.350

Heavy F 2.760 2.620 1.440 1.310 0.400 0.340 0.900 0.800 1.190 1.130 0.550 0.510

Light E 1.940 1.810 1.000 0.870 0.330 0.260 0.650 0.540 0.930 0.860 0.390 0.350

Heavy F 2.760 2.620 1.440 1.310 0.400 0.340 0.900 0.800 1.190 1.130 0.550 0.510

0.563 12 and 18 Heavy F 2.760 2.620 1.440 1.310 0.400 0.340 0.900 0.800 1.190 1.130 0.550 0.510

0.625 11 and 18 Heavy F 2.760 2.620 1.440 1.310 0.400 0.340 0.900 0.800 1.190 1.130 0.550 0.510

0.750 10 and 16 Heavy F 2.760 2.620 1.440 1.310 0.400 0.340 0.900 0.800 1.190 1.130 0.550 0.510

Wing Spread

A

Wing Height

B

Nominal

Size

Threads

per Inch Series

Nut Blank

Size

18 and 240.313

E

Bos s Di a meter Bos s Hei ght

G

Wing Thickness

C

Between Wings

D

13 and 200.500

14 and 200.438

16 and 240.375

20 and 280.250

24 and 280.216

40 and 440.125

32 and 400.138

24 and 320.190

32 and 360.164

A

B

GE

C

D


14/17

1 of 4

Washers

B

A

C

Plain Washer

Basic Max Min Basic Max Min Basic Max Min

N 0.281 0.296 0.276 0.625 0.640 0.620 0.065 0.080 0.051

W 0.312 0.327 0.307 0.734 0.749 0.727 0.065 0.080 0.051

N 0.344 0.359 0.339 0.688 0.703 0.681 0.065 0.080 0.051

W 0.375 0.390 0.370 0.875 0.905 0.868 0.083 0.104 0.064

N 0.406 0.421 0.401 0.812 0.827 0.805 0.065 0.080 0.051

W 0.438 0.453 0.433 1.000 1.030 0.993 0.083 0.104 0.064

N 0.469 0.484 0.464 0.922 0.937 0.915 0.065 0.080 0.051

W 0.500 0.515 0.495 1.250 1.280 1.243 0.083 0.104 0.064

N 0.531 0.546 0.526 1.062 1.092 1.055 0.095 0.121 0.074

W 0.562 0.577 0.557 1.375 1.405 1.368 0.109 0.132 0.086

N 0.594 0.609 0.589 1.156 1.186 1.149 0.095 0.121 0.074

W 0.625 0.640 0.620 1.469 1.499 1.462 0.109 0.132 0.086

N 0.656 0.686 0.649 1.312 1.342 1.305 0.095 0.121 0.074

W 0.688 0.718 0.681 1.750 1.780 1.743 0.134 0.160 0.108

N 0.812 0.842 0.805 1.469 1.499 1.462 0.134 0.160 0.108

W 0.812 0.842 0.805 2.000 2.030 1.993 0.148 0.177 0.122

N 0.938 0.968 0.931 1.750 1.780 1.743 0.134 0.160 0.108

W 0.938 0.968 0.931 2.250 2.280 2.243 0.165 0.192 0.136

N 1.062 1.092 1.055 2.000 2.030 1.993 0.134 0.160 0.108

W 1.062 1.092 1.055 2.500 2.530 2.493 0.165 0.192 0.136

N 1.250 1.280 1.243 2.250 2.280 2.243 0.134 0.160 0.108

W 1.250 1.280 1.243 2.750 2.780 2.743 0.165 0.192 0.136

N 1.375 1.405 1.368 2.500 2.530 2.493 0.165 0.192 0.136

W 1.375 1.405 1.368 3.000 3.030 2.993 0.165 0.192 0.136

N 1.500 1.530 1.493 2.750 2.780 2.743 0.165 0.192 0.136

W 1.500 1.545 1.490 3.250 3.295 3.240 0.180 0.231 0.153

N 1.625 1.655 1.618 3.000 3.030 2.993 0.165 0.192 0.136

W 1.625 1.670 1.615 3.500 3.545 3.490 0.180 0.213 0.153

1 5/8 1.750 1.795 1.740 3.750 3.795 3.740 0.180 0.213 0.153

1 3/4 1.875 1.920 1.865 4.000 4.045 3.990 0.180 0.213 0.153

1 7/8 2.000 2.045 1.990 4.250 4.295 4.240 0.180 0.213 0.153

2 2.125 2.170 2.115 4.500 4.545 4.490 0.180 0.213 0.153

2 1/4 2.375 2.420 2.365 4.750 4.795 4.740 0.220 0.248 0.193

2 1/2 2.625 2.670 2.615 5.000 5.045 4.990 0.238 0.280 0.210

2 3/4 2.875 2.940 2.865 5.250 5.315 5.240 0.259 0.310 0.228

3 3.125 3.190 3.115 5.500 5.565 5.490 0.284 0.327 0.249

1

1 1/8

1 1/4

1 3/8

9/16

5/8

3/4

7/8

5/16

3/8

7/16

1/2

1 1/2

Thickness

CNominal Washer Size

1/4

ID

A

OD

B


15/17

2 of 4

B

A

BW

W

Lock Washer

OD

Mean

Secon

Thickness

Secon

Width

Bearing

Width

Max Min Max Min Min Min

B T W BW

No. 2 (0.086) 0.094 0.088 0.172 0.020 0.035 0.024

No. 3 (0.099) 0.107 0.101 0.195 0.025 0.040 0.028No. 4 (0.112) 0.120 0.114 0.209 0.025 0.040 0.028

No. 5 (0.125) 0.133 0.127 0.236 0.031 0.047 0.033

No. 6 (0.138) 0.148 0.141 0.250 0.031 0.047 0.033

No. 8 (0.164) 0.174 0.167 0.293 0.040 0.055 0.038

No. 10 (0.190) 0.200 0.193 0.334 0.047 0.062 0.043

No. 12 (0.216) 0.227 0.220 0.377 0.056 0.070 0.049

1/4 0.260 0.252 0.487 0.062 0.109 0.076

5/16 0.322 0.314 0.583 0.078 0.125 0.087

3/8 0.385 0.377 0.680 0.094 0.141 0.099

7/16 0.450 0.440 0.776 0.109 0.156 0.109

1/2 0.512 0.502 0.863 0.125 0.171 0.120

9/16 0.574 0.564 0.965 0.141 0.188 0.1325/8 0.641 0.628 1.073 0.156 0.203 0.142

11/16 0.704 0.691 1.170 0.172 0.219 0.153

3/4 0.766 0.753 1.265 0.188 0.234 0.164

13/16 0.832 0.816 1.363 0.203 0.250 0.175

7/8 0.894 0.878 1.459 0.219 0.266 0.186

15/16 0.958 0.941 1.556 0.234 0.281 0.197

1 1.024 1.003 1.656 0.250 0.297 0.208

1 1/16 1.087 1.066 1.751 0.266 0.312 0.218

1 1/8 1.153 1.129 1.847 0.281 0.328 0.230

1 3/16 1.217 1.192 1.943 0.297 0.344 0.241

1 1/4 1.280 1.254 2.036 0.312 0.359 0.251

1 5/16 1.344 1.317 2.133 0.328 0.375 0.2621 3/8 1.408 1.379 2.219 0.344 0.391 0.274

1 7/16 1.472 1.442 2.324 0.359 0.406 0.284

1 1/2 1.534 1.504 2.419 0.375 0.422 0.295

1 5/8 1.663 1.633 2.553 0.389 0.424 0.297

1 3/4 1.789 1.758 2.679 0.389 0.424 0.297

1 7/8 1.914 1.883 2.811 0.422 0.427 0.299

2 2.039 2.008 2.936 0.422 0.427 0.299

2 1/4 2.293 2.262 3.221 0.440 0.442 0.309

2 1/2 2.543 2.512 3.471 0.440 0.442 0.309

2 3/4 2.793 2.762 3.824 0.458 0.491 0.344

3 3.043 3.012 4.074 0.458 0.491 0.344

Nominal

Washer Size

ID

A


16/17

3 of 4

C EB

A

Hardened Steel Washer

ID ODEdge

Distance

Min Max MinE

1/4 0.625 0.281 0.051 0.080 0.219

5/16 0.688 0.344 0.051 0.080 0.281

3/8 0.813 0.406 0.051 0.080 0.344

7/16 0.922 0.429 0.051 0.080 0.406

1/2 1.063 0.531 0.097 0.177 0.438

5/8 1.313 0.688 0.122 0.177 0.563

3/4 1.469 0.813 0.122 0.177 0.656

7/8 1.750 0.938 0.136 0.177 0.781

1 2.000 1.125 0.136 0.177 0.875

1 1/8 2.250 1.250 0.136 0.177 1.000

1 1/4 2.500 1.375 0.136 0.177 1.094

1 3/8 2.750 1.500 0.136 0.177 1.219

1 1/2 3.000 1.625 0.136 0.177 1.313

1 3/4 3.375 1.875 0.178 0.280 1.531

2 3.750 2.125 0.178 0.280 1.750

2 1/4 4.000 2.375 0.240 0.340 2.000

2 1/2 4.500 2.625 0.240 0.340 2.188

2 3/4 5.000 2.875 0.240 0.340 2.406

3 5.500 3.125 0.240 0.340 2.625

3 1/4 6.000 3.375 0.240 0.340 2.875

3 1/2 6.500 3.625 0.240 0.340 3.063

3 3/4 7.000 3.875 0.240 0.340 3.313

4 7.500 4.125 0.240 0.340 3.500

Thickness

NominalWasher Size A B C


17/17

4 of 4

Square Beveled Washer

B

B

T

A

Square Clipped Beveled Washer

B

T

E

Beveled Washers

Min Side

DimensionNom. ID

Mean

Thickness

Nom. Edge

Distance

B A T E

1/2 1.750 0.531 0.313 0.438

5/8 1.750 0.688 0.313 0.563

3/4 1.750 0.813 0.313 0.6567/8 1.750 0.938 0.313 0.781

1 1.750 1.125 0.313 0.875

1 1/8 2.250 1.250 0.313 1.000

1 1/4 2.250 1.375 0.313 1.094

1 3/8 2.250 1.500 0.313 1.219

1 1/2 2.250 1.625 0.313 1.313

Nominal

Washer Size

ASME PCC-1 Dimensions for

Hardened Washers

ID OD Thickness

A B T

14 15 28 3

16 17 30 4

20 21 37 5

24 25 44 6

27 28 50 6

30 31 56 6

33 34 60 6

36 37 66 6

39 42 72 6

42 45 78 6

45 48 85 6

48 52 92 6

52 56 98 6

56 62 105 6

64 70 115 6

70 76 125 6

76 82 135 6

82 88 145 6

90 96 160 6

95 101 165 6

100 107 175 6

Nominal Size

Bolts Nuts Washers

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