S-5185N115 0.512" ID x 0.869" OD ASME B18.21.1 Split Lock Washers

Split Lock Washers

1307FA00005 Split Lock Washers
1307FA00005 Split Lock Washers

Image may differ from product. See technical specification for details.

Part No.
Part No. 1307FA00005
Equivalent to mcmaster :
5185N115

Basic Information

System of Measurement Inch
Washer Type Split Lock
Specifications Met ASME B18.21.1

Dimension Parameters

ID 0.512"
OD 0.869"
Thickness 0.125"

Material & Strength Parameters

Material Black-Oxide Steel
Hardness Rockwell C38

Installation & Application Parameters

For Screw Size 1/2"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant

Special Type Parameters

Split Lock Washer Type Standard
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior vibration resistance prevents fastener loosening in high-stress industrial environments
  • Black-oxide steel construction provides excellent corrosion resistance and durability
  • Rockwell C38 hardness rating ensures long-lasting performance under heavy loads
  • Precision 0.512" ID and 0.869" OD dimensions guarantee perfect fit for 1/2" screw applications
  • ASME B18.21.1 compliance delivers reliable performance meeting industry standards
  • 0.125" thickness provides optimal spring tension without compromising space requirements
  • Environmental compliance with RoHS 3 and REACH regulations for safe industrial use

Professional Applications & Engineering Value

This split lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. The black-oxide steel construction provides superior corrosion protection while maintaining the necessary spring tension to prevent loosening under continuous vibration. Engineered with Rockwell C38 hardness, this washer maintains its structural integrity in heavy machinery, automotive assemblies, and construction equipment requiring 1/2" screw compatibility. The split design creates constant upward pressure against the bolt or nut head, effectively countering rotational forces that cause conventional fasteners to fail. Ideal for maintenance, repair, and OEM applications where reliable vibration resistance cannot be compromised.

Specification Summary & Compliance

This heavy-duty split lock washer features precise dimensional specifications with 0.512" inner diameter, 0.869" outer diameter, and 0.125" thickness, engineered for perfect compatibility with 1/2" screw sizes. Manufactured to ASME B18.21.1 standards for consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial applications worldwide.

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