5305-01-059-1927 (5305PL0783126)
NSN 5305-01-059-1927 (NIIN 01-059-1927) is a socket head cap screw in Federal Supply Class 5305, Screws — an externally threaded fastener whose threaded portion is of one nominal diameter. Manufacturer part number 5305PL0783126 (Jednolity Indeks Materialowy -, CAGE 9009H); also referenced as NAS1189-3T9K (National Aerospace Standards).
Key specs: 36 to 40 rockwell c overall hardness; full characteristics table below. NIIN assigned April 1978; DEMIL A (none required); unit of issue EA (each), $2.79 gov standard price; ships at 0.001 lb / 0 cu ft.