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 5990-01-174-6851
NSN 7035-01-364-8454
NSN 6220-01-123-9290
NSN 7035-01-350-4247
NSN 6135-00-455-2425
NSN 5910-00-244-4209
NSN 6650-00-451-1084
NSN 6650-01-396-5352
NSN 7035-00-215-3272
NSN 6240-01-384-3887
NSN 6685-01-539-1529
NSN 5990-01-065-0492