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 5998-00-378-4096
NSN 2925-01-259-6708
NSN 6110-00-205-1778
NSN 6220-01-076-4383
NSN 6145-00-607-8810
NSN 5925-01-060-2342
NSN 6645-00-413-0461
NSN 5855-01-476-0941
NSN 6650-01-382-7842
NSN 5855-01-262-8013
NSN 5945-01-411-6180
NSN 5985-01-173-0974