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 6135-01-648-4875
NSN 5975-01-214-3388
NSN 6150-01-223-9607
NSN 4140-01-218-5919
NSN 6110-01-089-6260
NSN 6320-01-353-9753
NSN 5895-00-067-8985
NSN 2925-01-659-8436
NSN 6645-01-441-4456
NSN 5950-00-547-4650
NSN 5895-00-016-0699
NSN 5905-01-246-4501