S-91375A126 5-40 x 3/8" 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 holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
- Exceptional durability and corrosion resistance provided by the black-oxide coating on alloy steel, extending service life
- High-strength performance with Rockwell C45 hardness, ensuring reliable torque transmission and resistance to wear
- Secure, flush installation thanks to the headless design and cup point tip, preventing component movement and damage
- Efficient installation and removal with the 1/16" hex drive, allowing for quick assembly in confined spaces
- Wide industrial compatibility due to UNC coarse threading and right-hand direction, suitable for various machinery and equipment
- Regulatory compliance assurance meeting ASME B18.3 standards, RoHS 3, and REACH for safe, global use
Professional Applications & Engineering Value
This 5-40 UNC set screw is engineered to address common industrial challenges like component slippage and vibration-induced loosening. The headless design and cup point tip create a firm, flush grip on shafts or collars, minimizing protrusion and enhancing safety in rotating assemblies. Made from black-oxide alloy steel, it offers excellent resistance to rust and wear, ideal for harsh environments in machinery, automotive, and aerospace sectors. The Class 3A thread fit and coarse UNC threads ensure quick, reliable fastening, reducing assembly time while maintaining high torque strength. Its compliance with ASME B18.3 standards guarantees consistent quality, making it a trusted choice for engineers seeking durable, precision fasteners.
Specification Summary & Compliance
This set screw features precise Class 3A thread fit with 5-40 UNC coarse threads and a diameter of 0.125", ensuring tight tolerances for secure fastening. It adheres to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial use.
