A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5965-01-536-6730
NSN 5990-01-443-2931
NSN 6620-00-168-0308
NSN 6650-01-097-6814
NSN 6105-01-509-1672
NSN 6145-01-043-5992
NSN 5925-01-411-6028
NSN 4140-00-113-1279
NSN 5975-01-065-3828
NSN 5985-01-458-0379
NSN 5910-00-585-0361
NSN 6620-00-075-6667