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.)
NSN 5990-01-279-8654
NSN 6645-01-105-2239
NSN 2925-01-090-2391
NSN 7035-01-528-9042
NSN 6150-01-170-5658
NSN 6650-00-034-8438
NSN 5920-01-368-5413
NSN 6645-01-413-0515
NSN 6145-01-423-7877
NSN 6685-01-352-5437
NSN 5925-00-525-4037
NSN 6650-01-258-5871