S-91309A624 3/8"-16 x 1" 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, heavy-duty fastening for critical applications
• Class 2A thread fit provides consistent, smooth assembly with standard UNC coarse threads
• External hex drive design allows for high-torque installation with common tools
• Full threading along the 1" length offers maximum grip and adjustability in assemblies
• Rockwell B69 hardness maintains structural integrity under mechanical stress
• Compliance with ASME B18.2.1 and ASTM A307 guarantees dimensional accuracy and material quality

Professional Applications & Engineering Value

Engineered for industrial reliability, these 3/8"-16 UNC hex head screws address common fastening challenges in machinery, structural frameworks, and equipment assembly. The steel construction with zinc plating combats rust and oxidation, reducing maintenance in humid or corrosive settings. With a coarse thread profile and Class 2A fit, they resist vibration loosening and enable quick installation in steel, aluminum, or composite materials. The external hex drive supports high clamping forces, making them ideal for applications requiring 60,000 PSI tensile strength and repeatable disassembly. These screws are trusted in construction, automotive, and manufacturing sectors where ASME B18.2.1 compliance ensures interchangeability and safety.

Specification Summary & Compliance

This hex head screw features a 3/8"-16 UNC coarse thread with Class 2A tolerance for precise fit. It meets ASME B18.2.1 and ASTM A307 specifications, ensuring dimensional consistency and material performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.