S-91375A134 5-40 x 1" ASME B18.3, ASTM F912 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 coating on alloy steel, extending service life in harsh industrial environments.
- Exceptional holding power due to Class 3A thread fit, ensuring tight, reliable fastening with minimal backlash.
- High durability and strength from Rockwell C45 hardness, resisting wear and deformation under heavy loads.
- Secure, non-slip installation with hex drive and cup tip design, providing positive engagement and preventing component slippage.
- Optimized for quick assembly with coarse UNC threads and right-hand direction, reducing installation time in production lines.
- Space-saving headless design allowing flush mounting in confined applications where protrusion is not feasible.
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use.
Professional Applications & Engineering Value
This 5-40 UNC set screw in black-oxide alloy steel is engineered to address critical challenges in machinery assembly, such as shaft securing, pulley retention, and precision alignment. The Class 3A thread fit and coarse thread spacing deliver consistent clamping force, preventing loosening under vibration—a common issue in motors and rotating equipment. The cup tip design concentrates pressure on a small area, enhancing grip without damaging components, while the hex drive allows high-torque installation with standard tools. Ideal for industrial set screws applications in automotive, aerospace, and heavy machinery, it combines corrosion resistance with Rockwell C45 hardness to withstand demanding conditions, reducing maintenance downtime and ensuring long-term reliability.
Specification Summary & Compliance
This set screw adheres to inch system dimensions with a 5-40 UNC thread size, 1" length, and Class 3A thread fit for precise tolerances. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global supply chains.
