S-91381A615 3/8"-16 x 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 Component Positioning – The brass soft tip prevents surface damage while maintaining firm grip, ideal for delicate assemblies.
- High Torque Application – Hex drive design allows for easy installation with standard tools, ensuring tight fastening in confined spaces.
- Superior Thread Engagement – Class 3A fit and coarse UNC threads provide reliable holding power with minimal risk of cross-threading.
- Enhanced Durability – Black-oxide coating on alloy steel resists corrosion and extends service life in harsh industrial environments.
- Consistent Performance – Rockwell C28 hardness ensures the set screw maintains shape and strength under repeated use.
- Headless Design Advantage – Flush mounting enables seamless integration where protruding fasteners are not feasible.
- Regulatory Compliance – Meets ASME B18.3, RoHS 3, and REACH standards for safe, globally accepted usage.
Professional Applications & Engineering Value
This 3/8"-16 UNC set screw is engineered to address common industrial challenges like vibration loosening and component misalignment. The black-oxide alloy steel construction offers excellent resistance to wear and environmental factors, while the brass soft tip eliminates marring on shafts or gears—critical in precision machinery, automotive systems, and rotating equipment. Its coarse thread design ensures quick assembly and robust clamping force, reducing maintenance downtime. With a Class 3A thread fit, it delivers tight tolerances for high-stress applications, making it a reliable choice for engineers seeking longevity and compliance in industrial set screws.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 specifications, with precise UNC coarse threads and Class 3A fit for optimal thread engagement. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental safety and material integrity. Dimensions include a thread diameter of 0.375", length of 1/4", and tip diameter of 0.188", all manufactured to consistent industrial standards for reliable performance.
