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 5965-01-388-1379
NSN 6110-00-133-1206
NSN 5920-01-499-5701
NSN 6220-00-926-1331
NSN 5990-01-116-2181
NSN 5925-00-203-1278
NSN 6110-00-598-2574
NSN 5996-00-222-6049
NSN 5925-00-903-1640
NSN 5925-00-190-0095
NSN 6320-01-268-3072
NSN 6220-00-977-8839