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 5835-01-170-5537
NSN 5930-01-069-4536
NSN 6135-01-351-1131
NSN 4140-01-548-8081
NSN 5945-00-267-9408
NSN 6620-01-003-2905
NSN 6685-00-883-4608
NSN 6645-01-167-0712
NSN 6130-00-966-1776
NSN 5990-00-761-9160
NSN 5895-00-892-1107
NSN 4140-01-476-7280