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 6135-00-284-1406
NSN 5960-01-121-9646
NSN 6645-01-436-4542
NSN 5920-01-088-8312
NSN 5835-00-127-6437
NSN 6685-00-788-6115
NSN 5925-00-257-6586
NSN 5985-01-560-7417
NSN 6145-01-109-2299
NSN 6240-01-536-3604
NSN 6240-01-159-5043
NSN 5835-01-013-9321