A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5925-00-079-6662
NSN 5915-01-358-6474
NSN 6650-01-614-7328
NSN 6320-00-422-9006
NSN 6110-01-166-2561
NSN 6685-01-486-0363
NSN 6150-00-265-7799
NSN 6650-01-212-3964
NSN 6135-00-010-5275
NSN 5965-01-461-7195
NSN 5998-00-808-8983
NSN 6645-00-914-2820