S-91251A009 1"-14 x 2 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, maintaining tight tolerances in critical assemblies.
• Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
• Fine UNRF threads deliver improved clamping force and better load distribution compared to coarse threads, ideal for precision equipment.
• Fully threaded design allows for maximum adjustability and uniform stress distribution along the entire length of the screw.
• Hex socket drive with 3/4" size enables high-torque installation and removal, minimizing stripping and improving assembly efficiency.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties, ensuring dependable performance in demanding applications.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to address critical challenges in heavy-duty machinery, automotive, and aerospace sectors where high tensile strength and vibration resistance are paramount. The Black-Oxide Alloy Steel construction, combined with a Rockwell C37 hardness, provides exceptional durability against wear and environmental exposure. The UNRF fine thread with Class 3A fit ensures precise alignment and secure fastening in components subject to dynamic loads, preventing loosening and maintaining structural integrity. Its fully threaded design offers versatile installation options, making it suitable for applications requiring consistent clamping force across the entire fastener length, from engine blocks to precision instruments.

Specification Summary & Compliance

This socket head cap screw features a 1"-14 UNRF fine thread with Class 3A dimensional accuracy, ensuring tight tolerances for precision assemblies. It is manufactured in accordance with ASTM A574 specifications, guaranteeing consistent mechanical properties and performance. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.