Midwest Fastener 5/16 in. Medium Split Lock Washer

The Midwest Fastener 5/16 in. Medium Split Lock Washer is engineered to provide reliable tension and prevent threaded fasteners from loosening due to vibration or movement. Made from durable 18-8 stainless steel, this washer offers superior corrosion resistance, making it well-suited for outdoor, marine, and general fastening applications. Featuring a split helical design, it exerts continuous spring force against bolt and nut assemblies to maintain tight, secure connections across various mechanical and structural installations.