S-91375A534 1/4"-20 x 5/16" 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 harsh industrial environments.
- Exceptional thread engagement and holding power from UNC coarse threads, ideal for vibration-prone applications.
- Precise and reliable torque transmission with a 1/8" hex drive, ensuring secure installation without slippage.
- High-strength and durability provided by alloy steel with a Rockwell C45 hardness, resisting wear and deformation.
- Secure and flush mounting due to the headless design and cup tip, preventing component movement and surface damage.
- Tight-tolerance Class 3A thread fit for consistent, high-quality fastening in precision assemblies.
- Broad compliance with industry standards including ASME B18.3 and ASTM F912, ensuring reliability and interchangeability.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to solve critical challenges in industrial fastening, such as component slippage and corrosion-induced failure. The UNC coarse thread design provides excellent grip and resistance to loosening under vibration, making it ideal for machinery, automotive, and heavy equipment applications. The headless construction and cup tip allow for flush installation, securing pulleys, gears, and collars without protruding parts. Manufactured from high-strength alloy steel and treated with a protective black-oxide finish, it delivers long-term performance in demanding conditions, reducing maintenance needs and downtime. This 1/4"-20 set screw is a reliable choice for engineers seeking precision, durability, and compliance in their assembly processes.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for high precision and consistent performance. It complies with ASME B18.3 and ASTM F912 manufacturing specifications, ensuring dimensional accuracy and reliability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety standards for use in various industrial markets.
