S-5185N141 1.28" ID x 2.036" OD ASME B18.21.1 Split Lock Washers

Split Lock Washers

1307FA00027 Split Lock Washers
1307FA00027 Split Lock Washers

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

Part No.
Part No. 1307FA00027
Equivalent to mcmaster :
5185N141

Basic Information

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

Dimension Parameters

ID 1.28"
OD 2.036"
Thickness 0.312"

Material & Strength Parameters

Material Zinc-Flake Coated Steel
Hardness Rockwell C38

Installation & Application Parameters

For Screw Size 1 1/4"

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 applications
  • Zinc-flake-coated steel construction provides excellent corrosion protection and extended service life
  • Rockwell C38 hardness rating ensures maximum durability and resistance to deformation under load
  • ASME B18.21.1 compliance guarantees precise dimensional accuracy and reliable performance
  • Perfect fit for 1 1/4" screws with 1.28" ID and 2.036" OD for secure fastening applications
  • RoHS 3 and REACH compliant meeting strict environmental regulations for industrial use
  • 0.312" thickness provides optimal spring tension and locking force in demanding environments

Professional Applications & Engineering Value

Engineered for critical industrial applications where vibration-induced loosening poses significant operational risks, these split lock washers deliver exceptional vibration resistance through their precision-crafted design. The zinc-flake-coated steel construction provides superior corrosion protection in harsh environments, while the Rockwell C38 hardness ensures the washer maintains its spring tension and locking capability under continuous stress. Ideal for heavy machinery, automotive assemblies, and structural applications requiring 1 1/4" screw fastening, these washers prevent costly downtime and maintenance by maintaining secure connections. The split design creates constant upward pressure on the fastener, effectively countering rotational forces that typically cause conventional fasteners to loosen over time.

Specification Summary & Compliance

This standard split lock washer features precise inch system dimensions with 1.28" internal diameter, 2.036" outer diameter, and 0.312" thickness, manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The zinc-flake coating provides enhanced surface protection while maintaining the mechanical properties required for effective locking performance in demanding applications.

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