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 5985-00-498-9987
NSN 6130-01-397-5834
NSN 6240-01-254-6019
NSN 5950-01-453-8754
NSN 4140-01-606-7869
NSN 6105-01-141-6359
NSN 7035-00-371-7749
NSN 6135-00-016-0071
NSN 7035-01-451-0143
NSN 5915-00-583-4970
NSN 5975-00-114-5354
NSN 6220-01-399-8586