S-94115A551 1/4"-20 x 1 1/4" ASME B18.3 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
- Secure anti-loosening performance with the nylon 6/6 plastic tip that provides vibration resistance and protects mating surfaces from damage.
- Exceptional durability in varied environments due to the black-oxide finish on alloy steel, offering good corrosion resistance.
- High-strength, precision fit with Class 3A UNC coarse threads ensuring reliable engagement and reduced cross-threading risk.
- Wide operational temperature range from -50°F to 250°F, making it suitable for diverse industrial applications.
- Optimized for high-torque installation using a 1/8" hex drive in a headless design, allowing for flush mounting and space-saving assembly.
- Consistent mechanical performance backed by a Rockwell C28 hardness, providing the necessary strength for demanding set screw functions.
- Compliance with major industrial standards including ASME B18.3, ensuring interchangeability and reliability in precision assemblies.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common challenges in industrial assembly, such as component slippage and thread wear. The nylon tip acts as a locking element, absorbing vibrations and maintaining clamp load without marring shafts or hubs, which is critical in power transmission systems and precision machinery. Its Class 3A UNC coarse thread facilitates quick installation and provides a secure fit even in high-vibration environments. The alloy steel construction with black-oxide coating ensures long-term durability, making it an ideal choice for automotive, aerospace, and heavy equipment applications where reliability and compliance with ASME B18.3 are paramount.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise dimensional accuracy, a length of 1-1/4", and a right-hand thread direction. It is manufactured in accordance with ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for global industrial use.
