S-91251A324 1"-14 x 5 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads
• Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
• Fine UNRF threading offers enhanced clamping force and superior adjustment precision
• Optimized partial threading design allows for concentrated strength where needed while reducing material weight
• Rockwell C37 hardness rating maintains structural integrity and prevents deformation under pressure
• 3/4" hex drive compatibility enables high-torque installation with standard industrial tools

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this black-oxide alloy steel socket head cap screw addresses critical challenges in machinery assembly, automotive manufacturing, and structural frameworks. The 1"-14 UNRF fine thread configuration delivers superior clamping force distribution, preventing joint loosening in high-vibration environments. The partially threaded design concentrates strength at critical stress points while the black-oxide surface treatment provides essential corrosion protection without compromising dimensional accuracy. These socket head cap screws are particularly valuable in applications requiring precise alignment and reliable fastening in confined spaces where hex drive compatibility ensures efficient installation and maintenance operations.

Specification Summary & Compliance

This socket head cap screw features precision Class 3A thread fit with 1"-14 UNRF fine threading and right-hand thread direction. Manufactured to ASTM A574 specifications with Rockwell C37 hardness and 170,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global industrial markets. All dimensions conform to inch system measurements with 5 1/2" overall length and 2 1/2" minimum thread length.