S-91465A140 3/8"-16 x 1 1/2" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• Enhanced torque application with external square drive for secure installation in high-vibration environments
• Reliable coarse threading (UNC) provides superior grip in softer materials and faster assembly times
• ASTM Grade A strength rating ensures consistent performance for low to medium-duty industrial applications
• 60,000 psi tensile strength delivers dependable load-bearing capacity without premature failure
• Partial threading design allows for precise clamping force control and reduced material stress
• RoHS 3 compliance guarantees environmental safety and regulatory acceptance in global markets
• Rockwell B69 hardness maintains thread integrity and resistance to wear during repeated use

Professional Applications & Engineering Value

This 3/8"-16 UNC square head screw addresses critical fastening challenges in industrial machinery, construction, and equipment assembly. The steel construction combined with ASTM A307 specifications provides optimal durability where high-strength fasteners are unnecessary but reliability is paramount. The coarse UNC thread prevents cross-threading in field applications while the external square drive withstands high torque requirements without cam-out. Partial threading ensures maximum grip length where full engagement isn't required, making it ideal for bracket mounting, structural connections, and maintenance applications requiring periodic disassembly.

Specification Summary & Compliance

Manufactured to Unified Standard Class 2A thread tolerances for consistent fit with standard nuts. Complies with ASTM A307 specifications for low-carbon steel fasteners and maintains RoHS 3 (2015/863/EU) environmental compliance. Features 3/8"-16 UNC coarse threads with 1" minimum thread length on a 1 1/2" overall shank. Mechanical properties include 60,000 psi tensile strength and Rockwell B69 hardness as verified per ASTM standards.