S-91465A296 1"-8 x 10" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Enhanced durability from ASTM Grade A steel construction, resisting wear in demanding industrial environments
• Reliable coarse threading with 1"-8 UNC design for faster installation and reduced cross-threading risk
• Secure external square drive providing superior torque transmission and slip resistance during tightening
• Optimized partial threading allowing precise clamping control where full-length threads aren't required
• Consistent performance with Unified Standard Class 2A thread fit ensuring proper mating with nuts and tapped holes
• Environmental compliance meeting RoHS 3 standards for safe use in regulated applications
• Cost-effective solution combining 60,000 psi tensile strength with ASTM A307 specifications for general purpose applications

Professional Applications & Engineering Value

This square head screw delivers critical mechanical advantages for industrial assembly and construction projects where vibration resistance and reliable fastening are paramount. The ASTM A307 Grade A steel composition provides sufficient tensile strength (60,000 psi) and Rockwell B69 hardness for structural connections without requiring high-strength alternatives. The 1"-8 UNC coarse thread configuration enables rapid installation in wood, metal, and composite materials, while the partial threading design concentrates thread engagement where clamping force is most needed. The distinctive external square drive head offers superior torque capability compared to standard hex designs, preventing tool slippage in high-torque applications. These characteristics make it particularly valuable for machinery bases, structural framing, and equipment assembly where right-hand threading and unified standard compatibility are essential.

Specification Summary & Compliance

This fastener maintains Unified Standard Class 2A thread tolerances for consistent fit with standard nuts and tapped holes. Manufacturing complies with ASTM A307 specifications for low carbon steel fasteners, ensuring material consistency and performance reliability. The 1"-8 UNC coarse thread with 2 1/2" minimum thread length provides standardized engagement characteristics. Environmental compliance is verified through RoHS 3 (2015/863/EU) adherence, confirming restriction of hazardous substances. The 10" length with partial threading offers flexibility for applications requiring specific unthreaded shaft sections.