S-96870A228 5/16"-18 x 1" ASME B18.2.1, ASTM F593 Grade 630 High-Strength 17-4 PH Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 17-4 PH Stainless Steel, ideal for harsh industrial environments and extended service life.
• High tensile strength of 130,000 psi ensures reliable performance under significant loads and stress, preventing fastener failure.
• Rockwell C28 hardness provides superior durability and resistance to wear, galling, and deformation during installation and use.
• Coarse UNC thread and Class 2A fit offer easier, faster assembly and reduced risk of cross-threading compared to fine threads.
• Fully threaded design allows for maximum grip length and adjustability in a wide range of material thicknesses.
• External hex drive and hex head enable high-torque installation with standard tools, ensuring a secure and tight fit.
• Compliance with major standards including ASME B18.2.1 and material grade ASTM F593 Grade 630 guarantees consistent quality and interchangeability.

Professional Applications & Engineering Value

This 5/16"-18 UNC Hex Head Screw is engineered to solve critical challenges in demanding applications. The 17-4 PH Stainless Steel construction provides excellent resistance to corrosion and oxidation, making it a superior choice for marine, chemical processing, and outdoor equipment where environmental factors degrade ordinary fasteners. The coarse thread spacing and Class 2A thread fit facilitate quick and reliable assembly, even in less-than-ideal field conditions, reducing installation time and labor costs. Its high tensile and yield strength ensures structural integrity in heavy-duty machinery, construction frameworks, and transportation systems, preventing loosening under vibration and dynamic loads. The combination of a fully threaded body and an external hex drive offers versatility and a secure, wrench-friendly installation, making it a go-to industrial hex screw for engineers prioritizing longevity and performance.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread with a Class 2A fit, ensuring standard-compliant dimensional accuracy and ease of assembly. It is manufactured in accordance with ASME B18.2.1 and is made from ASTM F593 Grade 630 material. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for hazardous substances.