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 6135-01-534-3007
NSN 5905-01-327-3524
NSN 6610-00-548-3452
NSN 2925-00-163-9016
NSN 5950-01-561-0791
NSN 5996-01-255-0397
NSN 5990-00-813-5620
NSN 6610-01-364-0294
NSN 6620-00-470-3219
NSN 5950-01-207-0028
NSN 6145-00-220-2687
NSN 6150-01-381-6717