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 6240-01-076-7695
NSN 6150-00-959-4560
NSN 4140-01-579-9513
NSN 5920-00-556-9993
NSN 6685-00-550-6804
NSN 6685-01-077-6402
NSN 5950-00-801-4491
NSN 6220-00-444-5265
NSN 5930-00-053-0048
NSN 5965-01-426-8325
NSN 5998-00-202-2888
NSN 6150-01-250-5354