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 2925-00-947-3181
NSN 5975-01-651-9528
NSN 5950-01-408-6172
NSN 5930-01-115-8471
NSN 5985-01-128-1946
NSN 6620-00-555-3992
NSN 6135-01-350-2932
NSN 6645-00-097-9269
NSN 5950-01-214-6934
NSN 6620-00-652-0926
NSN 5996-01-486-5412
NSN 6110-01-564-7532