5310-01-160-2053 (A)
NSN 5310-01-160-2053 (NIIN 01-160-2053) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number A; also referenced as DIN127M10 (Zf Industrieantriebe Witten Gmbh); A 10 DIN 127 (Lehigh Armstrong Inc); PS-020045 (Santana Motor Sa).
Key specs: 44 to 51 rockwell c hardness; full characteristics table below. NIIN assigned August 1983; DEMIL A (none required); unit of issue HD (hundred), $4.65 gov standard price; ships at 0.1 lb / 0.0011 cu ft.