S-90910A727 4-40 x 1" ASME B18.3 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
- Superior corrosion resistance with 18-8 stainless steel and passivated finish for extended service life in harsh environments
- Enhanced torque transmission and reduced cam-out thanks to the precision T8 Torx drive design
- Reliable thread engagement and high tensile strength of 60,000 psi for secure fastening in demanding applications
- Optimized material hardness at Rockwell B55 provides excellent durability and resistance to wear
- Precision Class 3A thread fit ensures consistent, high-quality assembly with minimal play
- Versatile partially threaded design allows for both clamping and alignment functions
- Full compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
Professional Applications & Engineering Value
This 4-40 UNC Torx screw with a rounded head is engineered to address critical industrial fastening challenges. The 18-8 Stainless Steel construction, combined with a passivated finish, provides exceptional resistance to corrosion and oxidation, making it ideal for electronics, machinery, and outdoor equipment where environmental factors are a concern. The T8 Torx drive offers superior torque transfer compared to traditional drives, reducing the risk of tool slippage and head stripping during high-torque assembly. The partially threaded design with coarse thread spacing ensures quick installation and reliable holding power, while the Class 3A thread fit guarantees precise alignment and vibration resistance in automated production lines. These features collectively enhance assembly efficiency, reduce maintenance costs, and improve the longevity of your products.
Specification Summary & Compliance
This screw features a 4-40 UNC thread with Class 3A precision fit and coarse thread spacing. It is manufactured in compliance with ASME B18.3 standards and is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence for global industrial use.
