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 5905-00-158-5862
NSN 6650-00-367-9230
NSN 5985-01-230-2977
NSN 5905-01-089-8398
NSN 5835-01-213-0833
NSN 5925-01-094-3659
NSN 5999-01-240-8246
NSN 5975-00-908-9478
NSN 6645-01-381-6084
NSN 5925-00-004-6308
NSN 5996-00-069-3515
NSN 6645-00-454-0930