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 5905-00-659-3904
NSN 6145-00-347-1171
NSN 6685-00-148-9729
NSN 2925-01-259-0785
NSN 2925-01-332-7178
NSN 5985-00-852-0457
NSN 6610-01-480-5014
NSN 5960-01-340-9485
NSN 6135-01-613-1464
NSN 6645-00-543-6515
NSN 6145-01-401-3713
NSN 5920-01-228-4384