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 6220-01-528-7232
NSN 5999-01-584-6359
NSN 5910-01-432-9867
NSN 5910-01-323-6139
NSN 7035-01-379-3795
NSN 5930-00-788-1408
NSN 5895-01-213-9043
NSN 5945-01-355-5385
NSN 6150-01-207-3170
NSN 6320-01-362-9518
NSN 6645-01-268-7265
NSN 6240-01-406-4042