S-90600A132 1/4"-20 x 1 1/2" 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 from 18-8 Stainless Steel with passivated finish, ideal for harsh environments
- Enhanced torque transmission with T27 Torx drive, reducing cam-out and tool wear
- Precise thread engagement with Class 3A fit and UNC coarse threads for reliable fastening
- Optimized load distribution through rounded button head design, minimizing surface damage
- High mechanical strength with 60,000 psi tensile strength and Rockwell B55 hardness
- Controlled thread application via partial threading, preventing over-tightening in critical assemblies
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 18-8 Stainless Steel rounded head screws deliver exceptional performance where corrosion resistance and mechanical reliability are paramount. The T27 Torx drive system provides superior torque transfer compared to conventional drives, significantly reducing fastener damage during installation in automated assembly lines. With Class 3A thread fit and UNC coarse threading, these fasteners ensure rapid installation and vibration resistance in machinery, electrical enclosures, and structural frameworks. The partially threaded design allows precise clamping force control, making them ideal for applications requiring specific engagement lengths without compromising joint integrity. The passivated finish enhances the natural corrosion resistance of stainless steel, extending service life in chemical processing, marine, and outdoor applications.
Specification Summary & Compliance
This 1/4"-20 x 1-1/2" rounded head screw features precision Class 3A thread fit with UNC coarse thread spacing and partial threading up to 1" minimum thread length. Manufactured to ASME B18.3 specifications with confirmed compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include Rockwell B55 hardness and 60,000 psi tensile strength, ensuring consistent performance across industrial applications.
