A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5910-01-551-8720
NSN 6150-00-412-4038
NSN 6610-01-542-2276
NSN 5835-00-471-2660
NSN 6620-01-457-9476
NSN 5985-01-612-0258
NSN 5945-01-290-4370
NSN 4140-00-471-1464
NSN 6685-00-342-4028
NSN 6220-00-339-2756
NSN 5895-00-765-4482
NSN 6135-01-116-3385