The pin is recessed, also known as m-style marine pin, has recessed button that helps prevent accidental pin removal, has hole for inserting a ring and lanyard (sold separtely)
No other part numbers with same form, fit, and function found.
A headed fastening device having a solid cylindrical or tubular body with retaining ball or pinlike detent(s). The detent(s) is/are positioned and actuated by means of a spring, elastomer or plunger. Plunger may be operated by thumb, cam or other means. May be furnished with a pull ring, pull and/or lock ring, attaching ring or hook.
NSN 6610-01-502-5952
NSN 5960-00-550-8673
NSN 6685-01-564-8934
NSN 6130-01-613-0055
NSN 6610-00-822-0431
NSN 6130-01-423-1383
NSN 4140-00-068-0267
NSN 6240-00-758-6392
NSN 5930-00-308-4371
NSN 5905-01-461-9294
NSN 5996-01-633-7979
NSN 6135-00-284-1406