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 6150-01-249-2508
NSN 5985-01-606-4609
NSN 4140-01-091-7269
NSN 5985-01-336-5543
NSN 5965-01-453-7504
NSN 2925-01-372-9455
NSN 5996-01-188-7548
NSN 6645-00-204-4100
NSN 5905-01-235-2000
NSN 6650-00-456-5892
NSN 5975-01-065-2953
NSN 2925-00-936-9344