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 5855-00-973-5717
NSN 6320-01-309-9595
NSN 6685-01-572-3673
NSN 6220-00-305-0801
NSN 5996-01-036-5639
NSN 5920-01-030-1112
NSN 2925-01-448-2880
NSN 5925-00-760-0956
NSN 5930-00-786-9337
NSN 5998-01-279-8076
NSN 5996-00-222-6049
NSN 5965-01-325-0627