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  • Hi Collar Thru Hardened Split Lock Washer Plain Finish

Hi Collar Thru Hardened Split Lock Washer Plain Finish

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Hi-Collar Thru-Hardened Split Lock Washer with Plain Finish – Precision Locking for Tight Spaces and High-Torque Assemblies

When precision matters and space is limited, the hi-collar thru-hardened split lock washer with a plain finish is the ideal fastening solution. Designed with a narrow outside diameter to match smaller head fasteners like socket head cap screws, this washer delivers consistent tension and powerful vibration resistance—without adding bulk to your assembly.

Engineered from medium carbon steel, each washer is thru-hardened, not just surface treated. This ensures full-strength durability throughout the entire cross-section, making it ideal for high-stress, high-torque applications. Unlike standard split lock washers, the hi-collar profile allows for better seating in countersunk holes and around precision fasteners.

The plain finish offers a clean, uncoated surface—perfect for indoor, controlled environments where corrosion is not a concern. This bare metal finish also provides better metal-to-metal contact, which enhances locking performance and minimizes slip.

Material & Coating:

  • Material: Medium carbon steel

  • Hardening: Thru-hardened for uniform mechanical strength

  • Finish: Plain (uncoated)

Dimensions & Tolerances:

  • Conforms to ASME B18.21.1 and DIN 7980 standards

  • Smaller outer diameter fits within tight design envelopes

  • Available in a range of inch sizes (from #4 to 1/2") and metric equivalents

Mechanical Properties:

  • High spring tension for long-lasting clamping force

  • Resists vibration-induced loosening

  • Ideal for use with socket head cap screws and precision bolts

Applications:

  • Aerospace, robotics, and electronics

  • High-precision machinery

  • Automotive and motorsports

  • Assembly lines using socket screws in confined areas

For a compact yet powerful locking solution, trust the hi-collar thru-hardened split lock washer with a plain finish—built for precision, made to last.