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 6685-01-575-3156
NSN 5965-00-726-3168
NSN 5999-01-462-1576
NSN 5895-01-515-2086
NSN 6620-01-365-1499
NSN 5950-00-947-1454
NSN 6610-01-585-5320
NSN 5999-01-570-0554
NSN 5990-00-206-3753
NSN 5925-01-619-0270
NSN 6620-01-453-6764
NSN 6145-01-487-3773