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 5990-01-595-9441
NSN 5996-01-163-1768
NSN 6320-01-116-3980
NSN 5965-00-529-0602
NSN 6220-01-367-6411
NSN 7035-01-476-7787
NSN 6320-01-384-7079
NSN 2925-01-108-3307
NSN 5998-00-399-1553
NSN 5960-01-316-8100
NSN 5950-00-881-7744
NSN 5835-01-581-9433