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 5910-01-193-0159
NSN 5905-01-193-2357
NSN 4140-01-170-5395
NSN 5965-00-289-6280
NSN 5975-00-541-8531
NSN 6220-00-159-2509
NSN 6135-01-455-5088
NSN 5920-00-213-6411
NSN 5990-01-174-6851
NSN 5998-01-625-9391
NSN 7035-01-026-0117
NSN 5999-01-501-4883