S-91770A878 3/8"-16 x 2 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional holding power from the wide rounded truss head design, distributing load effectively to prevent surface damage
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Easy installation and removal with Phillips No. 4 drive, reducing tool slippage and assembly time
- Coarse UNC threading provides quick engagement and strong grip in various materials
- Partially threaded shank allows for precise clamping force control in demanding applications
- Compliance with ASME B18.6.3 guarantees consistent quality and interchangeability
Professional Applications & Engineering Value
This 3/8"-16 UNC coarse thread screw is engineered to address critical fastening challenges in industrial settings. The passivated 18-8 stainless steel offers excellent resistance to corrosion and oxidation, making it suitable for outdoor equipment, marine hardware, and chemical processing facilities where moisture and corrosive agents are present. The rounded truss head provides a larger bearing surface, reducing the risk of pull-through in softer materials like plastics or sheet metal. With a Rockwell B70 hardness and 70,000 psi tensile strength, it maintains integrity under dynamic loads, while the Phillips drive ensures efficient installation in confined spaces. Ideal for assembly lines, machinery frames, and structural supports, this screw delivers long-term reliability and reduces maintenance costs.
Specification Summary & Compliance
This screw features a Class 2A thread fit for consistent assembly tolerance and a partial thread length of 1 1/2" on a 2 1/4" overall length. It conforms to ASME B18.6.3 specifications for dimensional accuracy and performance. 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 use in various industrial and consumer applications.
