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 6130-00-862-5516
NSN 6110-01-442-3544
NSN 5960-01-560-8461
NSN 5996-01-655-1227
NSN 5985-01-326-1451
NSN 5975-01-582-3748
NSN 5835-01-525-3220
NSN 5905-01-628-0111
NSN 6685-01-280-3823
NSN 4140-01-612-3723
NSN 5855-01-013-6864
NSN 6645-00-919-2201