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 6240-00-627-1493
NSN 5925-01-221-1669
NSN 6645-01-530-3654
NSN 5950-00-430-6282
NSN 6650-01-410-8542
NSN 6130-01-400-6123
NSN 5998-00-570-0325
NSN 6130-00-406-6778
NSN 4140-00-365-2531
NSN 5895-00-679-9479
NSN 5985-01-519-9295
NSN 5930-01-433-2422