45 degree chamfered on two corners
A square nut having a concave face and a concave or slotted top.
NSN 6650-01-036-9083
NSN 6130-01-180-0329
NSN 6610-00-499-4642
NSN 6685-01-333-5820
NSN 5960-00-752-6175
NSN 5935-01-292-9800
NSN 5945-01-243-0632
NSN 2925-01-411-4666
NSN 5998-01-290-3913
NSN 7035-01-230-0250
NSN 5925-01-442-8589
NSN 6320-01-371-3047