S-91251A419 1"-14 x 3" 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.
• Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
• Precision Class 3A fine threading provides tighter tolerances and improved vibration resistance for secure, long-lasting assemblies.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Fully threaded design allows for maximum grip and adjustability across the entire 3" length, enhancing assembly flexibility.
• 3/4" hex drive compatibility enables easy installation with standard tools, speeding up assembly processes.
• Compliance with ASTM A574 and environmental regulations ensures consistent quality and safe use in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these socket head cap screws deliver critical performance where reliability is non-negotiable. The black-oxide alloy steel construction provides enhanced corrosion resistance, making them ideal for machinery, automotive, and heavy equipment applications exposed to moisture and chemicals. The UNRF fine thread design ensures superior clamping force and vibration resistance, preventing loosening in dynamic systems. With a fully threaded 3" length and Class 3A thread fit, these fasteners offer precise alignment and maximum load distribution, solving common issues of joint failure and misalignment in high-stress assemblies. Their compliance with ASTM A574 guarantees material consistency, while the 170,000 psi tensile strength supports heavy-duty applications without compromising durability.

Specification Summary & Compliance

This socket head cap screw features a 1"-14 UNRF fine thread with Class 3A tolerance for precision fit, manufactured according to ASTM A574 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The product maintains consistent dimensions including a 1 1/2" head diameter, 1" head height, and 3/4" hex drive, supporting reliable performance in standardized industrial applications.