S-94105A414 1/2"-20 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
- 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 tensile strength from alloy steel and Rockwell C45 hardness prevents stripping and deformation under heavy loads.
- Secure installation with hex drive design allows for high torque application without head interference in confined spaces.
- Fine thread engagement (20 TPI) provides increased clamping force and improved resistance to loosening.
- Regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance.
- Standardized dimensions per ASME B18.3 guarantee consistent performance and interchangeability in OEM applications.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering advantages in precision machinery, automotive components, and permanent industrial assemblies. The headless hex drive design enables flush mounting where protruding fasteners are impractical, while the Class 3A UNF fine threads maintain clamping force in high-vibration environments. The combination of Rockwell C45 hardness and alloy steel construction prevents thread galling and withstands severe mechanical stress, solving common failure points in heavy-duty equipment. Ideal for securing gears, pulleys, and collars where reliable set screw performance is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with 1/2"-20 UNF Class 3A precision threads ensuring exact dimensional consistency. The right-hand fine threads provide optimal engagement in hardened materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for hazardous substance restrictions. The 1-1/4" length and flat tip design deliver consistent surface contact for secure component positioning.
