Material is per mil-s-1222h, heavy hex jam nut
No other part numbers with same form, fit, and function found.
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: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)
NSN 6105-01-502-9759
NSN 5855-00-198-3197
NSN 5960-01-004-5483
NSN 6220-01-050-0835
NSN 6145-01-611-5118
NSN 6320-00-456-2092
NSN 2925-01-027-1293
NSN 6135-01-201-5858
NSN 5920-01-494-9401
NSN 6620-00-632-3631
NSN 2925-00-947-3181
NSN 6645-01-495-0939