S-91375A563 1/4"-28 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, extending service life in demanding industrial environments.
- Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies.
- High mechanical strength from alloy steel and Rockwell C45 hardness prevents stripping and deformation under heavy loads.
- Secure, non-slip installation via hex drive and cup point design, providing excellent grip and positioning accuracy.
- Optimized for fine-thread applications with 1/4"-28 UNF threads, ideal for precise adjustments and thin materials.
- Space-saving headless construction allows flush mounting where clearance is limited.
- Comprehensive regulatory compliance with ASME, ASTM, RoHS 3, and REACH ensures safety and environmental responsibility.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component slippage, corrosion-induced failure, and assembly inaccessibility. The cup point tip bites securely into shafts and collars, preventing rotational movement in machinery, while the Class 3A UNF fine threads deliver superior clamping force in high-vibration environments like motors and precision equipment. The headless hex drive design allows installation in confined spaces, and the corrosion-resistant coating ensures longevity in humid or outdoor settings. Ideal for securing gears, pulleys, and knobs, this screw meets the demands of automotive, aerospace, and heavy machinery applications where reliability and thread accuracy are non-negotiable.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNF standards, ensuring precise engagement and minimal backlash. Manufacturing complies with ASME B18.3 and ASTM F912 specifications for dimensional consistency and mechanical properties. The product is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.
