5306-00-638-8201 (111-0001-034)
NSN 5306-00-638-8201 (NIIN 00-638-8201) is a machine bolt in Federal Supply Class 5306, Bolts — an externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. Manufacturer part number 111-0001-034 (The Boeing Company, CAGE 94756); also referenced as NAS501-4-6A (National Aerospace Standards).
Key specs: finished head; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each), $1.38 gov standard price; ships at 0.02 lb / 0.0012 cu ft.