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 6130-00-981-5575
NSN 5920-01-584-4144
NSN 7035-01-204-7481
NSN 5999-01-421-9795
NSN 5895-00-071-3994
NSN 2925-01-136-2551
NSN 6685-01-646-6895
NSN 5915-01-272-4182
NSN 5999-01-508-5023
NSN 5998-01-649-3464
NSN 5905-01-455-2509
NSN 5920-01-143-4657