S-91007A641 0.385" ID x 0.688" OD ASME B18.21.1 Oversized Split Lock Washers

Oversized Split Lock Washers

1312FA00007 Oversized Split Lock Washers
1312FA00007 Oversized Split Lock Washers

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

Part No.
Part No. 1312FA00007
Equivalent to mcmaster :
91007A641

Basic Information

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

Dimension Parameters

ID 0.385"
OD 0.688"
Thickness 0.115"

Material & Strength Parameters

Material 18-8 Stainless Steel
Hardness Rockwell C35

Installation & Application Parameters

For Screw Size 3/8"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/14/2023, 235 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
  • 18-8 stainless steel construction provides excellent corrosion resistance and durability
  • Rockwell C35 hardness ensures long-lasting performance under repeated loading
  • Precise dimensional fit with 0.385" ID and 0.688" OD for reliable 3/8" screw applications
  • ASME B18.21.1 compliance guarantees consistent quality and engineering standards
  • RoHS 3 and REACH compliant meeting international environmental and safety regulations
  • Standard split lock design delivers proven locking performance across industrial applications

Professional Applications & Engineering Value

These 18-8 stainless steel split lock washers are engineered to solve critical vibration-induced loosening problems in industrial settings. The standard split lock washer type creates continuous spring tension against both the bearing surface and fastener head, maintaining clamp force despite dynamic loads. The corrosion-resistant properties of 18-8 stainless steel make these washers ideal for harsh environments including chemical processing, marine applications, and outdoor equipment. With precise dimensions (0.385" ID, 0.688" OD) specifically designed for 3/8" screw sizes, they provide reliable locking performance in machinery assembly, automotive components, and structural frameworks where vibration resistance is critical to operational safety and equipment longevity.

Specification Summary & Compliance

This split lock washer features inch system measurements with 0.385" inner diameter, 0.688" outer diameter, and 0.115" thickness, engineered for 3/8" screw applications. Manufactured to ASME B18.21.1 specifications with standard split lock design and Rockwell C35 hardness rating. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial supply chains.

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