S-94135A585 5/16"-18 x 1 1/4" ASME B18.6.3 Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B87 hardness for demanding, high-stress applications.
• Enhanced load distribution thanks to the wide truss head profile, reducing surface pressure and preventing material damage.
• Secure and tamper-resistant installation enabled by the drilled spanner drive, ensuring precise torque application.
• Reliable and consistent threading with Class 2A fit and coarse UNC thread spacing for quick assembly and vibration resistance.
• Full compliance with industry standards including ASME B18.6.3, RoHS, and REACH, ensuring safety and environmental responsibility.
• Versatile right-hand thread design for standard installation in a wide range of industrial and construction settings.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 5/16"-18 UNC Rounded Truss Head Screw addresses critical challenges in assembly and maintenance. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for outdoor, marine, and chemical-exposed environments. Its wide truss head design distributes clamping force over a larger area, minimizing the risk of surface indentation on softer materials and enhancing joint integrity. The drilled spanner drive offers a secure grip for installation in tight spaces, reducing the chance of stripping and ensuring consistent torque. Fully threaded and with a coarse thread spacing, it allows for faster installation and improved holding power in wood, metal, and plastic components, commonly used in machinery, automotive, and structural frameworks.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse thread with a diameter of 0.313" and length of 1-1/4". It is manufactured in accordance with ASME B18.6.3 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its safety for use in various industries without hazardous substances.