S-91381A537 1/4"-20 x 1/2" ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide alloy steel construction, extending service life in harsh industrial environments.
- Enhanced gripping power and component protection thanks to the integrated brass soft tip, preventing damage to shafts and hubs.
- High-strength, precision threading with Class 3A UNC coarse threads ensuring reliable, vibration-resistant fastening in high-stress applications.
- Easy installation and high torque capability via the 1/8" hex drive and headless design, ideal for confined spaces.
- Consistent performance and durability backed by Rockwell C28 hardness, maintaining integrity under repeated use.
- Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use.
- Optimized for right-hand, coarse-thread applications providing quick assembly and strong holding force in machinery and equipment.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common challenges in precision assemblies, such as slippage and component wear. The Class 3A UNC coarse thread and right-hand thread direction deliver exceptional clamp load and vibration resistance, crucial for industrial machinery, automotive systems, and power transmission units. The brass soft tip minimizes marring on shafts and gears, while the hex drive and headless profile allow for secure tightening in limited-access areas. With Rockwell C28 hardness and a robust black-oxide finish, it withstands corrosive conditions and heavy-duty cycles, ensuring long-term reliability and reduced maintenance costs in B2B procurement scenarios.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit and UNC coarse thread standards with precise dimensions: 1/4"-20 thread size and 1/2" length. Manufactured in compliance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial applications.
