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 4140-01-652-2126
NSN 5910-00-870-4639
NSN 7035-01-268-0933
NSN 5985-01-515-2994
NSN 6610-01-394-4944
NSN 6645-01-076-4655
NSN 6650-00-252-2541
NSN 5996-00-112-4588
NSN 6620-01-446-6977
NSN 5950-01-174-0348
NSN 5998-01-165-2850
NSN 6145-01-067-8619