S-91251A445 0-80 x 5/32" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies, minimizing loosening over time.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
• Fine UNF threads deliver improved load distribution and sealing capabilities compared to coarse threads, ideal for precision applications.
• Fully threaded design allows for maximum adjustability and consistent clamping force along the entire fastener length.
• Rockwell C37 hardness ensures excellent wear resistance and durability, maintaining thread integrity through repeated use.
• Hex socket drive enables high-torque installation with secure tool engagement, preventing cam-out and damage to the fastener head.

Professional Applications & Engineering Value

These 0-80 UNF socket head cap screws are engineered to address critical challenges in precision machinery, aerospace components, and electronic enclosures where space constraints and vibration are major concerns. The black-oxide alloy steel construction combined with Class 3A fine threads provides exceptional resistance to loosening under dynamic loads, while the fully threaded design ensures uniform stress distribution across the entire engagement length. This makes them particularly valuable in applications requiring repeated disassembly, as the hardened surface maintains thread form integrity. The hex drive socket head profile allows for compact installation in confined spaces where traditional wrench access is limited, solving common assembly challenges in industrial fastener applications.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications, these screws maintain precise dimensional accuracy with Class 3A thread fit tolerances and UNF fine thread form. The 0-80 thread size with right-hand direction and 5/32" length provides standardized compatibility across inch-system applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and material safety in global supply chains.