Texas Pneumatic Tools bolt nuts are used in conjunction with a compatible threaded bolt to fasten and secure two or more parts. These lock nuts are best suited for high torque or vibration operations to prevent self loosening. The hex nuts (six-sided) can help secure a threaded bolt in tight spaces. These nuts can be accessed from any angle for ease of loosening or tightening using a wrench. The retainer nuts, on the other hand, snap readily onto a bolt and retain themselves in position; thereby preventing bolt loss in shear joint assemblies, especially in critical systems like flight control linkages or fuel controls.