S-91251A301 3/4"-16 x 4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications without failure.
• Precision Class 3A thread fit provides tight, secure fastening with minimal risk of loosening or vibration-induced issues.
• Fine UNRF threads offer improved load distribution and resistance to stripping in critical assemblies.
• Rockwell C37 hardness enhances durability and wear resistance, reducing maintenance needs over time.
• Partially threaded design allows for precise clamping force control and easier alignment in complex setups.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards for safety and environmental responsibility.

Professional Applications & Engineering Value

These socket head cap screws are engineered from black-oxide alloy steel to address common industrial challenges like corrosion and mechanical stress. The Class 3A thread fit and UNRF fine threads ensure precise, vibration-resistant connections in heavy machinery, automotive systems, and structural frameworks. With a tensile strength of 170,000 psi and Rockwell C37 hardness, they prevent stripping and deformation under dynamic loads, making them ideal for high-torque applications. The partially threaded configuration allows for optimal grip in assemblies requiring controlled clamping, while the hex drive facilitates easy installation in confined spaces, enhancing efficiency and reliability in demanding engineering projects.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and UNRF thread standards with fine spacing. It meets ASTM A574 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.