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 6110-01-574-1589
NSN 5945-00-914-8158
NSN 5975-00-556-9743
NSN 6105-00-243-0507
NSN 6650-00-248-4895
NSN 5950-00-288-5994
NSN 6220-01-441-1271
NSN 6105-00-664-1292
NSN 5920-01-059-2680
NSN 5960-00-275-7497
NSN 5920-01-210-5685
NSN 5905-01-600-0179