S-94779A820 1/4"-20 x 1/2" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and extended service life.
• Enhanced load distribution from the wide truss head design, reducing surface pressure and preventing material damage.
• High tensile strength of 70,000 psi ensures reliable fastening under heavy-duty mechanical stress.
• Rockwell B70 hardness provides excellent wear resistance and durability for repeated use.
• Secure and efficient installation with Phillips No. 3 drive, minimizing cam-out and ensuring tight fastening.
• Wide compatibility due to UNC coarse thread and Class 2A fit, facilitating easy assembly in various industrial applications.
• Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel Truss Head Screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and high-load demands. The Black-Oxide coating on 18-8 stainless steel significantly enhances corrosion resistance, making these truss head screws suitable for outdoor, marine, and chemical-exposed environments. The wide truss head design distributes clamping force over a larger area, reducing the risk of surface damage in softer materials like plastics or composites. With a UNC coarse thread and Class 2A fit, these screws offer quick installation and reliable holding power in applications such as machinery assembly, electrical enclosures, and automotive components. The Phillips drive ensures straightforward manual or automated driving, improving efficiency in high-volume production settings while maintaining consistent performance under 70,000 psi tensile strength conditions.

Specification Summary & Compliance

This screw features precise 1/4"-20 UNC coarse threads with a Class 2A thread fit for standard industrial tolerances and easy assembly. It is fully threaded for maximum grip and manufactured in compliance with ASME B18.6.3 specifications. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring it is free from hazardous substances and safe for various applications.