3/8" Split Lock Washer Plain Finish

Regular Split Lock Washer with Plain Finish – Proven Vibration Resistance

When dependable fastening security is required, the regular split lock washer with plain finish delivers classic, cost-effective performance. Designed to help prevent nuts and bolts from loosening under vibration, shock, and thermal cycling, these washers are widely used in automotive, construction, HVAC, and general industrial assemblies. Their simple helical design creates tension that actively resists rotation, helping maintain clamp load in dynamic applications.

Engineered for Strength and Reliable Performance

Material & Construction

Regular split lock washers are typically manufactured from medium carbon steel or alloy steel and are often heat-treated to enhance strength and spring tension. The split, helical shape allows the washer to exert continuous pressure against the fastener and mating surface, increasing friction and reducing the risk of back-off.

Plain Finish Benefits

The plain (uncoated) finish makes these lock washers an economical solution for indoor, dry environments where corrosion resistance is not a primary concern. They are ideal for controlled settings such as equipment assembly, machinery fabrication, and maintenance operations.

Dimensions, Standards & Compatibility

Available in sizes ranging from #4 through 1-1/2", regular split lock washers conform to ASME B18.21.1 dimensional standards. Precise inner and outer diameters ensure proper seating and alignment with standard bolts and nuts, including Grade 2, Grade 5, and comparable fasteners.

Mechanical Performance

• Spring tension resists vibration-induced loosening

• Maintains preload under moderate torque

• Helps reduce joint movement in dynamic assemblies

Common Applications

• Automotive and truck assemblies

• HVAC equipment and mechanical systems

• Agricultural machinery

• Steel fabrication and industrial maintenance

For projects requiring trusted, time-tested fastening security without added coatings or complexity, regular split lock washers with plain finish remain a dependable choice across countless industries.