What is one authorized means of securing the tow pintle on the M1151 uparmored HMMWV?

The authorized means of securing the tow pintle on the M1151 uparmored HMMWV is the cotter pin. This type of securing pin is designed to prevent components from loosening or coming apart during operation, ensuring the safety and stability of the equipment. The cotter pin is inserted through a hole in the pintle's securing mechanism and bent over to hold it in place.

Using a cotter pin is standard practice in military vehicles because it is reliable, easy to use, and provides a quick visual check to confirm that the pintle is secured properly. This method reduces the risk of equipment failure or detachment, which is crucial during off-road and tactical maneuvers.