Item must comply with requirements of defense supply center philadelphia production standard no. Po0153nrp
A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
Classification: Nuts of iron or steel
NSN 5996-01-370-6593
NSN 6645-01-619-2756
NSN 5935-01-057-2164
NSN 4140-01-147-6558
NSN 5905-00-030-5557
NSN 5999-01-013-9236
NSN 6610-00-202-5481
NSN 5905-01-378-5510
NSN 5925-00-882-7510
NSN 6610-01-476-7412
NSN 5855-01-284-0589
NSN 6145-01-349-4918