S-90910A492 1/4"-20 x 3/8" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh industrial environments
• Enhanced torque transmission through Torx Plus IP27 drive system, reducing cam-out and tool wear during high-torque applications
• Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance under heavy loads
• Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
• Low-profile rounded head design providing smooth surface finish while maintaining adequate drive engagement
• Full threading capability allowing complete penetration through materials for maximum holding power
• Regulatory compliance assurance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

These 1/4"-20 Torx Plus zinc-plated alloy steel rounded head screws deliver critical engineering advantages in demanding applications. The combination of high-strength alloy steel and zinc plating provides exceptional corrosion protection for outdoor equipment, machinery assemblies, and automotive components. The Torx Plus drive system eliminates common installation issues like screw head stripping, particularly valuable in automated production environments where consistent torque application is crucial. With UNC coarse threads and Class 3A fit, these fasteners ensure rapid assembly while maintaining vibration resistance in heavy machinery, electrical enclosures, and structural frameworks. The fully threaded design maximizes pull-out strength across varying material thicknesses, making them ideal for applications requiring uniform clamping force distribution.

Specification Summary & Compliance

These industrial-grade screws feature precision UNC 1/4"-20 coarse threads with Class 3A fit for superior dimensional accuracy. Manufacturing specifications comply with ASME B18.3 and ASTM F835 standards, ensuring consistent quality and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. The mechanical properties meet 120,000 psi tensile strength and Rockwell C39 hardness requirements, providing verified performance data for engineering calculations and safety-critical applications.