S-91385A625 3/8"-16 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
- Permanent vibration resistance with nylon patch thread locker that maintains locking performance from -50°F to 250°F
- Superior corrosion protection through black-oxide coating on alloy steel for extended service life
- High-strength construction with Rockwell C45 hardness rating for reliable performance in demanding applications
- Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and easy installation
- Space-saving headless design with hex drive for flush mounting in confined spaces
- Secure gripping action from cup point tip that digs into mating surfaces to prevent component movement
- Industry compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in applications where vibration resistance and thermal stability are critical. The permanent nylon patch thread locker provides reliable locking performance across extreme temperature ranges from -50°F to 250°F, making it ideal for automotive, machinery, and industrial equipment subjected to thermal cycling. The UNC Class 3A coarse threads ensure quick installation and secure fastening in high-vibration environments, while the headless hex drive design allows for flush mounting in space-constrained assemblies. The cup point tip creates positive engagement with mating surfaces, preventing slippage in pulley systems, gear assemblies, and shaft collars where positional accuracy is paramount.
Specification Summary & Compliance
This 3/8"-16 x 1-1/4" set screw features precise UNC Class 3A thread fit with coarse thread spacing for optimal engagement. Manufactured to ASME B18.3 specifications and ASTM F912 standards, it ensures dimensional accuracy and performance reliability. The fastener is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. The Rockwell C45 hardness rating guarantees durability, while the black-oxide surface treatment on alloy steel provides corrosion resistance in demanding operating conditions.
