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 6645-01-356-5946
NSN 6240-01-373-6417
NSN 7035-00-624-7265
NSN 5945-00-899-2447
NSN 5985-01-613-8472
NSN 6220-00-065-7948
NSN 6220-00-202-8591
NSN 5925-01-158-5008
NSN 6145-00-190-7489
NSN 5895-01-487-3123
NSN 6110-00-494-9135
NSN 6130-00-959-5800