A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6105-01-044-5405
NSN 5930-01-290-1901
NSN 5960-01-512-0233
NSN 5855-01-622-8764
NSN 6240-01-297-4329
NSN 5945-01-408-6767
NSN 5950-01-471-6778
NSN 5965-01-614-3623
NSN 5975-01-600-0889
NSN 6650-00-088-4741
NSN 5925-01-313-6825
NSN 5915-01-376-5015