A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-01-123-3248
NSN 5855-01-003-7102
NSN 5960-00-722-9729
NSN 5999-01-254-4984
NSN 6145-01-608-8903
NSN 6320-01-086-2602
NSN 6685-01-309-7644
NSN 5910-01-337-6042
NSN 6650-00-496-8762
NSN 5960-00-565-9133
NSN 7035-01-187-4286
NSN 5915-01-431-5300