S-91251A465 1-72 x 1/16" 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.
• Precision Class 3A thread fit guarantees tight tolerances and secure mating with nuts or tapped holes, minimizing backlash and vibration loosening.
• Black-oxide finish on alloy steel provides enhanced corrosion resistance, extending service life in demanding industrial environments.
• Fine UNF thread design offers superior holding power and resistance to loosening in applications subject to dynamic loads or thermal cycling.
• Compact 1/16" length and standard socket head allow for easy installation in confined spaces using a hex key, streamlining assembly processes.
• Full threading along the entire length enables adjustable positioning and uniform clamping force distribution across the fastened joint.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and adherence to international quality standards.

Professional Applications & Engineering Value

Engineered for precision fastening in critical assemblies, these 1-72 UNF Class 3A socket head cap screws address common industrial challenges such as space constraints and vibration-induced loosening. The black-oxide alloy steel construction, combined with a fine thread profile, delivers superior clamp load retention and corrosion resistance in machinery, aerospace components, and electronic enclosures. The hex drive socket head facilitates secure tool engagement, reducing slip and damage during torque application. Ideal for applications requiring high tensile strength and repeatable accuracy, these screws ensure long-term reliability in precision fastener systems, minimizing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This screw features a Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. Manufactured in accordance with ASTM A574 specifications, it guarantees consistent mechanical properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting environmentally responsible sourcing.