Nha is mounting group; material type is grade 8
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 6130-01-556-6940
NSN 6650-01-384-1657
NSN 5950-00-596-7020
NSN 6220-00-682-8292
NSN 6110-01-265-1080
NSN 5975-01-245-7781
NSN 5910-01-485-5051
NSN 5985-01-546-2003
NSN 7035-00-946-2642
NSN 2925-01-422-1542
NSN 5996-01-421-9391
NSN 5920-01-116-6630