S-90600A784 5/16"-18 x 1 1/2" ASME B18.3, ASTM F879 Stainless Steel Button Head Torx Screws
Stainless Steel Button Head Torx 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
- Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments and extended service life.
- Superior torque transmission and reduced cam-out thanks to the T40 Torx drive, ensuring secure fastening and minimal tool wear.
- High tensile strength of 60,000 psi provides reliable load-bearing capacity and structural integrity in demanding applications.
- Precise Class 3A thread fit with UNC coarse threads ensures tight, vibration-resistant connections and easy assembly.
- Fully threaded design offers consistent holding power along the entire length for uniform clamping force.
- Rounded button head profile delivers a low-profile, aesthetically clean finish while reducing snagging risks.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 5/16"-18 x 1-1/2" T40 Torx rounded head screw is engineered from 18-8 stainless steel with a passivated finish, providing outstanding resistance to corrosion, chemicals, and oxidation in industrial settings. Its UNC coarse threading and Class 3A fit deliver superior grip and vibration resistance, making it ideal for machinery, automotive assemblies, and electronic enclosures where loosening under stress is a concern. The T40 Torx drive enhances torque efficiency, reducing slippage and damage during installation. Fully threaded for consistent clamping, this screw ensures reliable performance in high-stress applications, supported by compliance with ASME B18.3 standards for dimensional accuracy and durability.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with Class 3A fit for precise tolerance, a length of 1-1/2 inches, and full threading. It meets ASME B18.3 specifications (referencing ASTM F879) for consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it ensures environmental safety and material reliability in industrial use.
