2a and b8
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.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5990-01-041-8008
NSN 5895-01-333-0960
NSN 6135-01-562-3056
NSN 6645-00-071-2200
NSN 5905-01-464-4464
NSN 6135-01-243-5797
NSN 6240-01-491-6118
NSN 6105-01-646-3506
NSN 5996-01-489-5494
NSN 5990-01-338-2103
NSN 6150-01-565-9935
NSN 6610-00-071-0057