S-91375A613 1 1/4"-7 x 1 1/2" 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, extending service life in harsh industrial environments.
- Exceptional holding power from Class 3A thread fit, ensuring reliable, vibration-resistant fastening in high-stress applications.
- High-strength durability with Rockwell C45 hardness alloy steel, resisting deformation under heavy loads.
- Secure and easy installation via 5/8" hex drive, allowing high torque application without slippage.
- Effective component positioning with cup tip design, providing positive gripping on shafts and collars.
- Optimized for coarse threading with 1 1/4"-7 UNC, enabling quick assembly and disassembly in general-purpose uses.
- Headless design for flush mounting in confined spaces, maintaining a clean and unobstructed assembly surface.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial machinery, automotive, and heavy equipment applications. Its Class 3A thread fit and coarse UNC threads deliver maximum clamping force and vibration resistance, preventing loosening in dynamic environments. The Rockwell C45 hardness ensures the screw maintains integrity under repetitive stress, while the cup tip securely bites into components, eliminating slippage in shaft collars, gears, and pulleys. Ideal for precision set screw uses where space is limited, the headless design and robust 5/8" hex drive facilitate reliable installation in demanding assemblies, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNC standards, ensuring precise dimensional accuracy. It meets ASME B18.3 and ASTM F912 specifications for consistent manufacturing quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence for global industrial use.
