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 5905-01-370-4989
NSN 6220-01-383-7764
NSN 6620-00-815-2281
NSN 2925-01-254-8925
NSN 6685-01-512-9982
NSN 5975-00-001-1397
NSN 6145-01-622-2967
NSN 5835-01-397-1585
NSN 5945-00-768-4608
NSN 5895-01-120-6730
NSN 6145-00-753-2264
NSN 6645-01-519-2220