Midwest Fastener #10 Internal Tooth Lock Washers, 12-Pack

The Midwest Fastener #10 Internal Tooth Lock Washers provide reliable fastening performance by securing bolts, screws, and nuts against loosening caused by vibration and movement. Featuring internal teeth that bite into the mating surface and fastener head, these lock washers deliver exceptional grip and tension retention across automotive, mechanical, and general hardware applications. Crafted from durable steel with a corrosion-resistant zinc finish, these lock washers ensure long-lasting durability in demanding indoor and outdoor environments. Ideal for contractors, mechanics, and DIY enthusiasts looking for dependable fastening hardware.