S-91102A030 0.322" ID x 0.583" OD ASME B18.21.1 Split Lock Washers

Split Lock Washers

1307FA00074 Split Lock Washers
1307FA00074 Split Lock Washers

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

Part No.
Part No. 1307FA00074
Equivalent to mcmaster :
91102A030

Basic Information

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

Dimension Parameters

ID 0.322"
OD 0.583"
Thickness 0.078"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell C38

Installation & Application Parameters

For Screw Size 5/16"

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 environments, ensuring long-term joint integrity.
  • Zinc-plated steel construction provides excellent corrosion resistance, extending the washer's service life in various industrial conditions.
  • Rockwell C38 hardness rating offers exceptional durability and spring action, maintaining consistent locking force under load.
  • Precision-engineered split design creates a reliable biting action on mating surfaces for enhanced fastener security.
  • ASME B18.21.1 standard compliance guarantees dimensional accuracy and performance reliability for professional applications.
  • RoHS 3 and REACH compliance ensures environmental responsibility and safe use across global markets.
  • Optimized 5/16" screw size compatibility delivers perfect fit and maximum effectiveness in standard fastener systems.

Professional Applications & Engineering Value

This zinc-plated steel split lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The split lock washer type creates continuous spring tension that compensates for thermal expansion and dynamic loads, while the Rockwell C38 hardness ensures the washer maintains its spring properties without deformation. The zinc plating provides sacrificial protection against corrosion, making it ideal for outdoor applications and environments with moisture exposure. Engineered to ASME B18.21.1 standards, this washer delivers predictable performance in critical fastener security applications where reliability cannot be compromised.

Specification Summary & Compliance

This split lock washer features precise dimensions of 0.322" ID x 0.583" OD with 0.078" thickness, specifically designed for 5/16" screw sizes. Manufactured to ASME B18.21.1 specifications for standard lock washers, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.

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