S-92311A566 1/4"-28 x 1 1/4" ASME B18.3 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 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
- Exceptional thread precision with Class 3A fit and UNF fine threads, ensuring tight, secure fastening and vibration resistance.
- High mechanical strength backed by Rockwell B80 hardness, providing excellent durability under load.
- Secure, flush installation thanks to the headless hex drive and cup tip, preventing protrusion and offering reliable torque transmission.
- Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.
- Right-hand thread design for standard installation and ease of use in common assembly processes.
- Precise 1 1/4" length for accurate positioning and secure component fastening in confined spaces.
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A set screw is engineered to address critical industrial fastening challenges, such as component slippage and corrosion-induced failure. Made from 18-8 Stainless Steel, it offers excellent resistance to rust and chemical exposure, making it suitable for machinery, automotive, and electronics where environmental factors are a concern. The fine thread spacing and Class 3A thread fit provide superior holding power, reducing the risk of loosening under vibration—common in motors and precision equipment. The hex headless design with a cup tip ensures a flush mount, preventing interference and enabling secure fastening in tight assemblies. Ideal for applications demanding high-performance industrial fasteners, this screw enhances equipment longevity and operational safety.
Specification Summary & Compliance
This set screw features a 1/4"-28 UNF thread with Class 3A thread fit for high precision and fine thread spacing. It complies with ASME B18.3 manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
