S-90128A921 3/4"-10 x 3 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.
• Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in harsh industrial environments.
• Class 3A thread fit guarantees precise, secure mating with nuts and tapped holes, minimizing assembly issues and vibration loosening.
• 5/8" hex drive and standard socket head allow for high-torque installation with common tools, speeding up assembly and maintenance.
• Partially threaded design offers optimal grip and clamping force where needed, enhancing joint integrity in machinery and structural applications.
• Rockwell C37 hardness ensures excellent wear resistance and durability under repetitive loads and extreme conditions.
• Compliance with ASTM A574, RoHS 3, and REACH assures consistent quality and environmental safety, meeting global industry standards.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 3/4"-10 UNC Socket Head Cap Screw addresses critical challenges in heavy machinery, automotive, and construction applications. The zinc-plated alloy steel material combats corrosion and wear, while the coarse UNC thread and Class 3A fit provide rapid, secure fastening even in high-vibration environments. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands extreme mechanical stresses, reducing downtime and maintenance costs. Ideal for use in partially threaded configurations, it ensures precise clamping in assemblies where reliability is paramount, supporting efficient operations in sectors like manufacturing and equipment repair.

Specification Summary & Compliance

This screw features a 3/4"-10 UNC coarse thread with Class 3A thread fit for high precision, a length of 3 1/2", and a minimum thread length of 2 1/2". It adheres to ASTM A574 specifications for consistent manufacturing quality and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met in industrial supply chains.