Used on c130 hercules
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 5855-00-247-7219
NSN 6320-01-386-3491
NSN 6240-01-426-5581
NSN 6610-00-547-9649
NSN 5935-00-137-0982
NSN 7035-01-483-1776
NSN 6610-00-699-0714
NSN 6610-00-253-3549
NSN 5998-00-275-2145
NSN 6620-01-502-7105
NSN 6685-00-157-3289
NSN 7035-00-631-3782