S-94105A398 1/2"-20 x 3/8" 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
- Precision Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash
- High-strength Rockwell C45 hardness provides exceptional durability under heavy loads and repeated adjustments
- 1/4" hex drive design enables easy installation and removal with standard tools while preventing cam-out
- Fine UNF 1/2"-20 threading delivers enhanced clamping force and superior resistance to loosening
- Compact 3/8" length offers space-saving installation in confined assembly areas
- Headless construction with flat tip provides flush mounting and consistent pressure distribution
Professional Applications & Engineering Value
Engineered for precision positioning and secure component retention, these black-oxide alloy steel set screws solve critical challenges in industrial machinery, automotive assemblies, and precision equipment. The Class 3A UNF fine threads maintain tight tolerances in high-vibration environments, while the Rockwell C45 hardness ensures dimensional stability under extreme mechanical stress. The headless design with 1/4" hex drive facilitates installation in space-constrained applications where protruding fastener heads are impractical. Ideal for securing gears, pulleys, and collars onto shafts, these industrial set screws provide reliable, long-term performance in demanding right-hand thread applications requiring repeated adjustments and maintenance.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications and ASTM F912 standards, these set screws feature Class 3A thread fit precision with UNF 1/2"-20 fine threading. The black-oxide surface treatment enhances corrosion protection while maintaining dimensional accuracy. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global industrial markets.
