4 holes equally spaced, countersunk 82 degrees by 0.281 in. Dia
Classification: Military equipments not identified by kind
NSN 5990-01-127-1108
NSN 6645-01-258-5558
NSN 7035-01-391-7470
NSN 5920-01-074-4333
NSN 6645-00-831-6826
NSN 5999-00-633-7592
NSN 5999-00-853-6401
NSN 5905-01-516-4906
NSN 5895-01-513-4377
NSN 5925-01-107-1951
NSN 6645-00-900-5830
NSN 6150-01-056-5288