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 6645-01-329-3890
NSN 6620-00-477-7808
NSN 5925-00-529-3950
NSN 5975-01-139-4128
NSN 5920-01-244-0476
NSN 5915-00-593-8212
NSN 5975-01-318-7812
NSN 6135-00-267-9432
NSN 2925-01-604-8984
NSN 6320-00-149-7570
NSN 5925-01-480-6701
NSN 5998-00-528-9032