S-91375A550 1/4"-20 x 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 holding power with Class 3A thread fit for reliable, vibration-resistant fastening in demanding applications.
- Exceptional durability provided by alloy steel construction and Rockwell C45 hardness, ensuring long service life under high stress.
- Enhanced corrosion resistance from the black-oxide finish, protecting the screw in various industrial environments.
- Secure, flush installation thanks to the headless design and hex socket drive, ideal for confined spaces.
- Effective grip and marking prevention with the cup point tip, which bites into surfaces without causing excessive damage.
- Broad compatibility with UNC coarse threads, facilitating quick assembly and disassembly in right-hand applications.
- Regulatory peace of mind by meeting ASME B18.3 standards and being RoHS 3 & REACH compliant for global use.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges like component slippage and fastener failure. The headless design and hex socket drive allow for a secure, low-profile installation in tight spaces, while the Class 3A UNC coarse thread ensures a precise, robust fit that resists loosening under vibration. The cup point tip provides excellent grip on shafts and collars, minimizing movement without severe surface damage. Ideal for machinery, automotive assemblies, and precision equipment, this screw delivers consistent performance where high-strength fastening and reliability are critical, supported by its compliance with major industry standards.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for high precision and strength. It is manufactured from alloy steel with a black-oxide finish and meets ASME B18.3 specifications. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for international industrial use.
