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 6320-00-593-0379
NSN 5915-01-032-4176
NSN 5905-01-101-9328
NSN 6220-01-110-7562
NSN 5855-01-263-7669
NSN 6135-01-038-6225
NSN 6130-00-535-4494
NSN 6135-01-367-6203
NSN 5975-01-652-1761
NSN 6130-00-126-1133
NSN 5935-01-081-7409
NSN 5945-01-507-8706