S-90600A130 1/4"-20 x 1" ASME B18.3 Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish for extended service life in harsh environments
• Enhanced torque transmission through T27 Torx drive system, reducing cam-out risk and tool wear during high-torque applications
• Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant connections in critical assemblies
• Optimized head design featuring a rounded button profile that provides a finished appearance while minimizing protrusion
• Exceptional mechanical strength delivering 60,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Full threading capability allowing complete engagement along the entire 1" length for maximum holding power
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial acceptance

Professional Applications & Engineering Value

These 1/4"-20 UNC Torx rounded head screws provide engineering solutions where corrosion resistance and high-strength fastening are critical. The 18-8 Stainless Steel composition with passivated finish creates a protective oxide layer that withstands chemical exposure and atmospheric conditions, making them ideal for marine, food processing, and outdoor equipment applications. The T27 Torx drive system ensures superior torque transfer compared to conventional drives, preventing stripping in high-vibration environments while the rounded button head design offers a low-profile installation that reduces snagging hazards. With Class 3A thread fit and coarse thread spacing, these fasteners deliver rapid assembly and disassembly while maintaining precision alignment in machinery, electronic enclosures, and structural frameworks.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications. These fully threaded screws feature a 1/4"-20 thread size with right-hand thread direction and comply with ASME B18.3 manufacturing specifications. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for global industrial markets and restricted substance requirements.