5310-00-013-8542 (1220)
NSN 5310-00-013-8542 (NIIN 00-013-8542) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number 1220 (Itw Shakeproof Automotive Products, CAGE 78189); also referenced as MILW6986TYPEA (Military Specifications); 138542 (Chrysler Realty Company LLC); 138452 (General Motors Corp); 1829V256 (Kenworth Truck Co), plus 13 more in the reference table below.
Key specs: 40 to 50 rockwell c hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); ships at 0.0001 lb / 0 cu ft. Supersedes 5310-00-194-7367 (1963), 5310-00-595-7254 (1963), 5310-00-610-0902 (1963) and 1 more; related NSN 5310-00-595-7237.