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 5996-01-383-4029
NSN 5855-00-237-4088
NSN 5985-01-467-9502
NSN 6620-00-114-2837
NSN 6240-00-643-4532
NSN 6610-01-633-8931
NSN 5855-00-138-2386
NSN 5999-01-168-1670
NSN 5905-00-232-9602
NSN 6650-01-454-5175
NSN 6320-00-908-6841
NSN 6685-01-238-7969