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 6220-00-284-3220
NSN 5835-01-190-5192
NSN 5950-01-382-8209
NSN 5920-00-484-8074
NSN 5925-00-377-0263
NSN 5950-00-459-1781
NSN 6150-01-119-0222
NSN 5910-01-232-6045
NSN 6145-00-609-5330
NSN 4140-01-374-1498
NSN 5960-00-983-3317
NSN 2925-00-078-0525