TDP castle nut has three staking notches, equally spaced, of 0.084 width +0.02/-0.00 tolerance, at 45 degree angle. There's no debate as to what these notches
are for, castle nuts should be properly torqued (38-42 ft/lb), and
staked in two places. Despite experience and lessons learned from LE
armorers and users, some still do not believe it's necessary to stake
the castle nut.