S-91375A492 7/8"-14 x 1 1/4" 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
- Exceptional holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications.
- Superior corrosion resistance from the black-oxide finish, extending service life in harsh industrial environments.
- High tensile strength and durability due to alloy steel construction and Rockwell C45 hardness, preventing stripping and deformation.
- Secure, tool-friendly installation with a 1/2" hex drive, allowing for high torque application without head protrusion.
- Reliable grip and minimal surface damage from the cup tip design, ideal for frequent adjustments on shafts and collars.
- Wide compatibility with 7/8"-14 UNF fine threads, ensuring a tight fit and reduced loosening in right-hand assembly setups.
- Full regulatory compliance meeting ASME B18.3 and ASTM F912, plus RoHS 3 and REACH, for safe global industrial use.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial machinery, such as shaft slippage and component misalignment. The headless hex drive and fine UNF threads provide a flush, high-torque fastening solution that resists vibrational loosening in motors, pulleys, and coupling systems. With a Rockwell C45 hardness and cup tip, it ensures minimal marring on precision components while maintaining a firm grip under heavy loads. Ideal for right-hand thread applications in automotive, aerospace, and manufacturing equipment, this screw enhances assembly reliability and reduces maintenance downtime.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNF standards, ensuring precise engagement and strength. It meets ASME B18.3 and ASTM F912 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for international industrial markets.
