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 5990-00-949-8451
NSN 6220-00-819-9325
NSN 6145-01-094-1442
NSN 5905-00-275-0467
NSN 5999-01-105-7069
NSN 5905-01-397-8237
NSN 2925-01-528-7333
NSN 5920-01-279-5010
NSN 6610-01-442-3509
NSN 5920-00-835-3339
NSN 6135-01-156-4627
NSN 5905-00-989-0095