S-91251A921 10-24 x 6 3/4" 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 coating on alloy steel extends service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, ideal for critical assemblies.
• Partially threaded design allows for controlled clamping force and easier alignment in complex machinery.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity over repeated use.
• Coarse UNC threading enables quick installation and removal, saving time in maintenance and production.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 10-24 UNC thread socket head cap screw addresses common challenges like vibration loosening and corrosion. The black-oxide alloy steel construction offers a durable barrier against moisture and chemicals, making it suitable for automotive, aerospace, and heavy machinery applications where exposure to harsh conditions is frequent. Its partially threaded rod design concentrates stress on the engaged section, reducing the risk of stripping in soft materials. With a coarse thread spacing and hex drive, it allows for rapid assembly using standard tools, minimizing downtime. The high tensile strength and precise Class 3A fit ensure that these screws maintain clamp load under dynamic loads, providing long-term reliability in critical fastening points.

Specification Summary & Compliance

This socket head cap screw features a 10-24 UNC thread with Class 3A thread fit for high precision, and a coarse thread spacing to facilitate easy engagement. Dimensions include a length of 6 3/4", head diameter of 5/16", and drive size of 5/32". It is manufactured in compliance with ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.