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 6135-00-840-6451
NSN 5855-01-554-8514
NSN 6145-01-476-5451
NSN 6135-00-271-0407
NSN 5895-01-622-7512
NSN 5990-00-990-8940
NSN 7035-01-411-6062
NSN 6610-01-100-3662
NSN 5935-01-384-1332
NSN 5985-01-483-0412
NSN 5950-00-405-3773
NSN 5915-01-585-7488