S-91375A081 2-56 x 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 on alloy steel for extended service life in harsh industrial environments
- Exceptional holding power achieved through Class 3A thread fit precision, ensuring secure fastening in critical applications
- High-strength performance with Rockwell C45 hardness rating, providing reliable resistance to deformation under heavy loads
- Easy installation and removal with 0.035" hex drive design, allowing efficient maintenance with standard tools
- Optimized grip and positioning through cup tip design, preventing component slippage in assembled products
- Reliable coarse threading with UNC 2-56 specification, delivering quick assembly and strong engagement in various materials
- Space-saving headless construction enabling flush mounting where clearance is limited
Professional Applications & Engineering Value
This 2-56 UNC set screw delivers critical engineering solutions for industrial applications requiring precise component positioning and secure fastening. The black-oxide alloy steel construction provides essential corrosion protection while maintaining the Rockwell C45 hardness needed for high-stress environments. The hex drive design ensures reliable torque transmission during installation, while the Class 3A thread fit guarantees consistent engagement in precision machinery, automotive assemblies, and electronic enclosures. The cup tip configuration creates concentrated pressure points that prevent shaft slippage in power transmission systems, making these headless set screws ideal for permanent installations where vibration resistance is paramount.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features UNC 2-56 coarse threading with right-hand direction and 1/2" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
