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 5925-00-170-4090
NSN 5855-00-288-1408
NSN 5925-01-529-6371
NSN 6220-00-826-7002
NSN 6685-01-307-0297
NSN 5930-00-862-3205
NSN 6650-01-055-7512
NSN 6220-01-109-1014
NSN 5975-01-266-7663
NSN 5999-01-061-2712
NSN 6650-00-804-2039
NSN 5990-00-583-9920