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 5996-01-309-8718
NSN 5985-01-536-3739
NSN 6320-01-547-2743
NSN 6650-00-071-8184
NSN 6220-01-649-9259
NSN 5930-01-465-6075
NSN 6645-01-198-3865
NSN 6130-00-872-5688
NSN 5925-00-001-1277
NSN 6685-00-591-3824
NSN 6240-01-258-5829
NSN 5950-00-955-5706