A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5930-01-361-5381
NSN 5990-01-560-7032
NSN 6110-00-408-5697
NSN 7035-01-271-1643
NSN 6650-00-287-5868
NSN 5895-00-021-4861
NSN 6685-01-552-8769
NSN 6620-01-401-5356
NSN 6150-01-418-1909
NSN 6150-01-160-1790
NSN 5999-01-338-0602
NSN 6620-01-275-2781