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 5999-00-878-1051
NSN 5950-01-124-3560
NSN 5960-00-443-1483
NSN 5930-01-367-2786
NSN 6620-01-171-2505
NSN 5975-01-144-2416
NSN 6685-01-592-0709
NSN 6645-01-338-1423
NSN 5985-01-265-8416
NSN 5998-01-237-3601
NSN 6220-01-480-0546
NSN 5920-01-384-1869