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 5855-00-631-4565
NSN 5950-01-512-3277
NSN 5925-00-971-5633
NSN 7035-00-465-3298
NSN 6135-00-932-3136
NSN 6320-01-607-0347
NSN 6645-00-171-9639
NSN 6240-00-141-6143
NSN 6685-01-061-0602
NSN 6150-01-400-4211
NSN 6135-01-265-1384
NSN 6320-00-216-8779