S-90910A518 8-32 x 1 1/4" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
• Enhanced torque transmission and reduced cam-out with Torx Plus IP15 drive for reliable, efficient fastening
• Exceptional tensile strength (120,000 psi) and hardness (Rockwell C39) for high-load applications
• Precise Class 3A thread fit ensures secure, vibration-resistant connections in coarse UNC threading
• Fully threaded design provides consistent holding power along the entire 1-1/4" length
• Low-profile rounded button head offers a finished appearance while minimizing protrusion
• Comprehensive regulatory compliance meets ASME B18.3, ASTM F835, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These 8-32 UNC zinc-plated alloy steel screws deliver critical performance in industrial assembly where vibration resistance and durability are paramount. The Torx Plus IP15 drive system prevents tool slippage, reducing installation errors and component damage in high-torque applications. With Class 3A thread fit and coarse thread spacing, they provide rapid assembly and superior holding power in machinery, automotive components, and electrical enclosures. The combination of 120,000 psi tensile strength and Rockwell C39 hardness ensures reliable performance under sustained mechanical stress, while the zinc plating protects against corrosion in harsh operating conditions.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit tolerances with UNC coarse threading (8-32 size) and right-hand thread direction. Complies with ASME B18.3 and ASTM F835 manufacturing specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards.