S-92205A588 5/16"-18 x 1 1/2" Sealing Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Reliable sealing under extreme conditions thanks to the silicone rubber O-ring, which performs from -80° to 400° F and withstands up to 20,000 psi pressure.
• High tensile strength of 80,000 psi ensures the screw can handle significant mechanical loads without failure.
• Easy installation and removal with the external hex drive and standard hex head, allowing for quick assembly with common tools.
• Secure and precise thread engagement due to the UNC coarse thread and Class 2A fit, reducing the risk of cross-threading in industrial applications.
• Optimized for high-pressure sealing applications with a partially threaded design that ensures effective performance in demanding systems.
• Compliance with environmental and safety standards, including RoHS 3 and REACH, making it suitable for regulated industrial and global markets.

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw is engineered to address critical challenges in high-pressure and temperature-variable environments, such as hydraulic systems, pneumatic equipment, and industrial machinery. The 18-8 stainless steel provides excellent resistance to corrosion and oxidation, extending service life in moist or chemically aggressive settings. Combined with the silicone rubber O-ring, it delivers reliable sealing that prevents leaks under pressures up to 20,000 psi and across a broad temperature range from -80° to 400° F. The partially threaded design and coarse UNC thread facilitate faster installation and better grip in coarse materials, reducing assembly time and enhancing joint integrity. Ideal for B2B procurement in sectors like oil and gas, automotive, and heavy equipment, this screw ensures durability and performance where failure is not an option.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threading with a size of 5/16"-18. It meets manufacturing specifications for tensile strength (80,000 psi) and hardness (Rockwell B85), ensuring reliability in mechanical fastening. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms it is free from hazardous substances, supporting safe and sustainable industrial applications.