Wrenching facility per ms33787-20
A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.
Classification: Nuts of iron or steel
NSN 6650-01-317-2101
NSN 5910-01-349-5595
NSN 4140-00-605-0396
NSN 5835-00-998-5757
NSN 5905-00-225-8667
NSN 5855-01-578-7848
NSN 6685-01-200-4742
NSN 5950-01-455-6725
NSN 6620-01-265-0632
NSN 5905-01-292-3811
NSN 6240-01-468-6408
NSN 6220-01-630-2010