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 5855-01-279-9938
NSN 5895-01-076-7063
NSN 6320-00-857-4073
NSN 5985-00-871-3251
NSN 6320-01-312-3620
NSN 5990-01-510-4699
NSN 5935-01-519-0770
NSN 5996-01-535-6443
NSN 5960-01-240-2365
NSN 5910-01-456-5232
NSN 5920-01-145-5362
NSN 6150-00-252-8036