When designing the new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), they've engineered a solution to install the castle nut onto the end plate that is not only robust but also stands true to their brand of innovation and ingenuity. The K1 system features a tapered castle nut that seals itself onto the end plate. This ultra precision snug fit allows the castle nut to seat and seal itself into place without the need of staking the end plate. No ratcheting, no set screws, no backing out and no failures. All of these features at only .59 oz / 16.8 grams!

Specifications and features:
Lightweight design at only .55 oz / 16.8 grams total
Castle nut and end plate are 7075 T6 Aircraft Grade Aluminum
Quick Detach Socket - 360° rotational locking interface
No set screws or ratcheting system
Black Castle Nut
Made in the USA

Note:
**No torque wrench required, just tighten about 1/4 turn from hand tight. If using a torque wrench, be sure to only use 15-20 ft lbs - this is much less than your typical castle nut.