S-91101A013 0.227" ID x 0.377" OD ASME B18.21.1 Split Lock Washers

Split Lock Washers

1307FA00043 Split Lock Washers
1307FA00043 Split Lock Washers

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

Part No.
Part No. 1307FA00043
Equivalent to mcmaster :
91101A013

Basic Information

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

Dimension Parameters

ID 0.227"
OD 0.377"
Thickness 0.056"

Material & Strength Parameters

Material Steel
Hardness Rockwell C38

Installation & Application Parameters

For Screw Size No. 12

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 due to the split lock design, preventing fastener loosening in high-stress industrial environments
  • Exceptional durability and spring action provided by Rockwell C38 hardness steel, ensuring long-term performance under repeated loading
  • Precise fit for No. 12 screws with 0.227" ID and 0.377" OD, offering reliable installation and consistent clamping force
  • Guaranteed dimensional accuracy through compliance with ASME B18.21.1 specifications, ensuring interchangeability and reliability
  • Enhanced safety and environmental responsibility with full RoHS 3 and REACH compliance, meeting strict regulatory standards
  • Robust corrosion resistance from high-quality steel construction, suitable for demanding industrial applications
  • Cost-effective maintenance solution by reducing the need for frequent retightening and component replacements

Professional Applications & Engineering Value

This steel split lock washer delivers critical vibration resistance in demanding mechanical assemblies where dynamic loads and thermal cycling threaten joint integrity. Engineered with Rockwell C38 hardness and manufactured to ASME B18.21.1 standards, it provides consistent spring force that maintains bolt tension in machinery, automotive systems, and electrical enclosures. The 0.227" ID ensures perfect compatibility with No. 12 screws, while the split design creates continuous radial pressure that counters rotational loosening. This makes it ideal for industrial applications requiring reliable lock washers that meet both performance and regulatory requirements without compromising on durability or safety.

Specification Summary & Compliance

This standard split lock washer features precise inch dimensions (ID: 0.227", OD: 0.377", Thickness: 0.056") manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance consistency. 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 use.

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