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 6150-01-390-0824
NSN 5925-01-260-9384
NSN 5855-01-505-9158
NSN 5975-01-056-5514
NSN 6240-01-575-8201
NSN 6685-01-218-5074
NSN 6220-01-628-7571
NSN 5895-00-385-9003
NSN 5990-01-089-6743
NSN 6145-00-076-9324
NSN 6150-01-223-3354
NSN 7035-00-834-2090