S-5185N123 1.28" ID x 2.036" OD ASME B18.21.1 Split Lock Washers
Split Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance due to the split lock design that maintains tension under dynamic loads
- Enhanced corrosion protection from the black-oxide steel finish, extending service life in harsh environments
- Exceptional durability with Rockwell C38 hardness to withstand high-stress applications without deformation
- Reliable performance ensured by compliance with ASME B18.21.1 standards for dimensional accuracy and function
- Safe for industrial use with RoHS 3 and REACH compliance, free from hazardous substances
- Perfect fit for 1 1/4" screws with precise 1.28" ID and 2.036" OD for secure fastening in inch-system assemblies
- Consistent spring action from the standard split lock washer type, preventing loosening under cyclic loads
Professional Applications & Engineering Value
This black-oxide steel split lock washer is engineered to address critical challenges in industrial settings, such as fastener loosening due to vibration and thermal cycling. The split lock design provides continuous spring tension, compensating for material relaxation and maintaining clamp load in machinery, automotive, and construction assemblies. Made from high-strength steel with a Rockwell C38 hardness, it resists wear and deformation under heavy loads, while the black-oxide surface treatment offers mild corrosion resistance, reducing maintenance needs. Ideal for use with 1 1/4" screws in inch-based systems, it ensures reliable performance in equipment subject to dynamic stresses, enhancing safety and longevity in demanding applications like engine mounts, structural frameworks, and heavy-duty manufacturing.
Specification Summary & Compliance
This washer features precise dimensions: 1.28" ID, 2.036" OD, and 0.312" thickness, designed for 1 1/4" screw sizes in inch measurement systems. It conforms to ASME B18.21.1 standards for split lock washers, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted substances and safe for industrial use.
