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 6320-01-067-0474
NSN 5965-01-073-6047
NSN 5925-01-542-6451
NSN 6145-01-290-2736
NSN 5895-01-172-6120
NSN 5985-01-385-6632
NSN 6645-01-477-9292
NSN 5950-01-349-8983
NSN 6650-01-160-9160
NSN 5915-01-076-6445
NSN 5905-01-090-8612
NSN 5855-01-606-9511