S-94779A880 1/4"-20 x 1 1/4" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws
Stainless Steel Truss Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and extending 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 performance under significant stress and vibration.
- Excellent drive engagement with a No. 3 Phillips drive, providing secure installation and reducing cam-out risks.
- Precise and reliable threading with UNC coarse threads and Class 2A fit for quick assembly and consistent fastening.
- Full threading along the 1-1/4" length offers versatile fastening depth and strong hold across the entire shank.
- Compliance with major industry standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
Professional Applications & Engineering Value
This Black-Oxide 18-8 Stainless Steel Truss Head Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. The Black-Oxide surface treatment on the 18-8 stainless steel provides an extra layer of protection against rust and chemical exposure, making it suitable for outdoor, marine, and chemical processing equipment. The wide truss head offers a larger bearing surface, which is critical for securing softer materials or sheet metal without indentation. Combined with UNC coarse threads and a Class 2A thread fit, it ensures rapid installation and reliable performance in industrial assembly lines, automotive frameworks, and machinery where corrosion-resistant screws are essential for long-term durability and reduced maintenance.
Specification Summary & Compliance
This screw adheres to precise dimensional standards with a 1/4"-20 UNC coarse thread and Class 2A thread fit for consistent accuracy. It meets the ASME B18.6.3 specification for mechanical and dimensional requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and consumer applications.
