S-91385A175 1/2"-20 x 1 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
- Vibration-resistant locking with permanent nylon patch thread locker that maintains secure fastening under dynamic loads
- Superior corrosion protection through black-oxide coating on alloy steel, extending service life in demanding environments
- Precise thread engagement with Class 3A UNF fine threads ensuring tight tolerances and reliable assembly fit
- High-strength performance backed by Rockwell C45 hardness for exceptional durability and load-bearing capacity
- Wide temperature compatibility with thread locker effective from -50°F to 250°F for diverse operating conditions
- Secure installation control through 1/4" hex drive design providing positive torque application in confined spaces
- Concentrated gripping force from cup tip design that minimizes surface damage while maximizing holding power
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and positional security are paramount. The UNF Class 3A thread system provides precise fitment in machinery, automotive components, and precision equipment, while the permanent nylon patch thread locker eliminates the need for secondary locking mechanisms. Engineered with Rockwell C45 hardness, this fastener maintains structural integrity under heavy loads, making it ideal for permanent assemblies in manufacturing equipment, power transmission systems, and high-vibration environments. The cup tip design concentrates clamping force without damaging shaft surfaces, preserving the integrity of expensive components while ensuring reliable positioning in critical applications.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNF 1/2"-20 fine thread configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The black-oxide alloy steel construction meets ASTM F912 standards, ensuring consistent performance and reliability across industrial applications.
