Lock Washers 3/8 25pk

The Lock Washers 3/8 25pk from ALLSTAR PERFORMANCE are essential fastening components designed to prevent bolts and screws from loosening due to vibration, impact, or constant movement. Whether you're assembling an engine, building a race car, working on machinery, or performing general maintenance, these split-ring lock washers provide a reliable mechanical lock that keeps critical fasteners secure without requiring thread-locking compounds. The 25-pack quantity makes them ideal for technicians, builders, and shops that need dependable fastening solutions on hand.

These lock washers feature a split-ring design with a 3/8-inch inner diameter (0.375 in) and 0.677-inch outer diameter, delivering 0.102 inches of thickness for optimal spring tension and holding power. Manufactured from steel and finished with zinc oxide coating, they resist corrosion and oxidation while maintaining their mechanical lock under high-vibration environments. The split-ring design creates a constant outward spring force that compensates for fastener rotation, making them far more effective than flat washers alone in preventing bolt creep and loosening.

Builders and mechanics benefit most from the Lock Washers 3/8 25pk when working with any application where vibration control is critical—engine builds, suspension work, transmission assembly, and structural bolting all demand the reliability these washers provide. Compatible with 3/8-inch fasteners across automotive, industrial, and general mechanical assembly, they're lightweight at 0.18 lbs and compact enough for any toolbox or workshop. Stack installation is straightforward: place the split lock washer directly under the bolt head or nut, and the spring tension ensures a secure grip that lasts.