S-91236A635 3/8"-16 x 2 3/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
• Coarse UNC threads enable faster installation and better performance in softer materials
• External hex drive design allows for high torque application with standard tools
• Partial threading offers optimal grip strength while reducing material usage
• Class 2A thread fit ensures smooth assembly and consistent performance across applications

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers exceptional engineering value for industrial assembly applications where high tensile strength and corrosion resistance are critical. The steel construction with zinc plating provides reliable protection against environmental factors, making it ideal for outdoor equipment, machinery frames, and structural applications. The coarse UNC thread design ensures secure fastening in various materials while the external hex drive enables efficient installation with standard wrenches. With partial threading optimizing clamping force distribution, this fastener solves common challenges of joint integrity and vibration resistance in heavy-duty applications, from construction to manufacturing equipment assembly.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with UNC coarse threads (3/8"-16) and meets ASME B18.2.1 dimensional specifications. Manufactured to ASTM A307 standards, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental responsibility and safety standards for industrial use worldwide.