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 5925-01-355-6523
NSN 6105-01-536-3901
NSN 5855-01-414-6265
NSN 5855-01-235-5491
NSN 7035-01-322-0221
NSN 5999-00-882-8720
NSN 5905-01-569-6908
NSN 5975-00-924-9927
NSN 5905-00-514-1984
NSN 6220-00-759-8611
NSN 5945-01-461-0017
NSN 6145-01-344-9116