Military-Fasteners.com MS28775-328 O-RING SPEC Description: Inner diameter: 1.850", thickness 0.210", preformed packing hydraulic o-ring MS28775-328 Manufacturer certs (CofC) are provided free on all orders Order this part online Additional Information Gov. Issued Name: O-Ring NSN: 5331-00-624-1855 NIIN: 006241855 FSC: O Rings / 5331 Associated NSN(s): 5331-00-077-9912 5331-00-292-0583 5331-00-585-6943 Schedule B: 4016.93.0000, Gaskets, washers and other seals, of vulcanized rubber other than hard rubber National Motor Freight: 194120, Washers / Gaskets / Pckg Dvcs Noi Manufacturer Country: United States See page 2 for technical characteristics