S-90910A712 4-40 x 1/4" ASME B18.3 Stainless Steel Button Head Torx Plus Screws

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 Torx Plus IP8 drive system for secure fastening and extended tool life
• Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent performance and easy assembly
• High mechanical strength with 60,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Low-profile rounded head design provides smooth finished appearance while maintaining structural integrity
• Full regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH requirements for global industrial use
• Complete threading coverage across the 1/4" length ensures maximum grip and load distribution

Professional Applications & Engineering Value

These 4-40 UNC Torx Plus screws deliver exceptional performance in critical assembly applications where vibration resistance and corrosion protection are paramount. The combination of 18-8 stainless steel material and passivated surface treatment creates a robust barrier against chemical exposure and environmental degradation, significantly extending service life in manufacturing equipment, electronic enclosures, and precision instruments. The Torx Plus drive system addresses common installation challenges by eliminating cam-out issues that can damage fastener heads and compromise joint integrity. With their rounded head profile and coarse thread spacing, these fasteners provide reliable clamping force while minimizing stress concentration points, making them ideal for repeated disassembly and maintenance cycles in industrial machinery and automotive components.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread spacing ensuring consistent mating with corresponding components. These 1/4" length screws feature complete compliance with ASME B18.3 specifications for dimensional accuracy and mechanical properties. The product meets stringent regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence for international industrial applications.