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 7035-01-538-7381
NSN 5915-01-633-9845
NSN 6645-01-283-1476
NSN 6320-01-600-5808
NSN 6685-00-891-9304
NSN 5905-00-244-7638
NSN 5910-01-416-3174
NSN 5950-01-152-1271
NSN 5975-00-594-8857
NSN 5996-01-347-4211
NSN 6320-00-636-0922
NSN 5925-01-080-9984