A nut, flat on top and bottom, having 4 flat sides. 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 6105-01-600-3652
NSN 5925-01-006-1222
NSN 6320-00-908-6841
NSN 2925-01-248-6028
NSN 2925-01-359-9818
NSN 6110-01-127-0952
NSN 5945-00-844-7602
NSN 6110-00-338-9015
NSN 6240-00-266-6258
NSN 5895-01-536-6958
NSN 5915-00-344-7480
NSN 5920-01-223-3116