S-90600A131 1/4"-20 x 1 1/4" 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 construction and passivated finish, ideal for harsh industrial environments
- Enhanced torque transmission and reduced cam-out through T27 Torx drive design for secure, efficient installation
- Precision assembly and vibration resistance ensured by Class 3A thread fit with UNC coarse threading
- High mechanical strength with 60,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Optimized partial threading allows for precise clamping force control and material clearance
- Rounded button head profile provides a low-profile, finished appearance while minimizing snagging
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety standards
Professional Applications & Engineering Value
Engineered for industrial fastening solutions requiring reliability and precision, these 18-8 stainless steel rounded head screws deliver exceptional performance in demanding environments. The T27 Torx drive prevents tool slippage during high-torque applications, while the Class 3A thread fit ensures tight tolerances that resist loosening under vibration. With a passivated finish enhancing corrosion resistance, these screws are ideal for machinery, electronics, and outdoor equipment where moisture and chemical exposure are concerns. The partially threaded UNC design provides superior grip in assembled components, making them perfect for applications requiring both secure clamping and easy disassembly.
Specification Summary & Compliance
This 1/4"-20 x 1-1/4" screw features UNC coarse threading with Class 3A precision thread fit and partial threading up to 1" minimum. Manufactured to ASME B18.3 specifications with Rockwell B55 hardness and 60,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
