5306-00-678-1419 (7345066)
NSN 5306-00-678-1419 (NIIN 00-678-1419) is a ribbed shoulder bolt in Federal Supply Class 5306, Bolts — an externally threaded fastener whose threaded portion is of one nominal diameter. Manufacturer part number 7345066 (U S Army Tank Automotive Command, CAGE 19207).
Key specs: 32 rockwell c minimum and 38 rockwell c maximum overall hardness; full characteristics table below. NIIN assigned January 1960; DEMIL A (none required).