S-91770A540 1/4"-20 x 3/4" 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 load-bearing capacity with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance
- Enhanced fastening stability from the wide truss head design that distributes pressure and resists pull-through
- Quick installation efficiency with No. 3 Phillips drive and coarse UNC threads for rapid assembly
- Precise thread engagement ensured by Class 2A fit and full threading along the 3/4" length
- Broad compatibility with standard 1/4"-20 UNC components, reducing sourcing complexity
- Regulatory peace of mind through compliance with ASME B18.6.3, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These rounded truss head screws deliver critical engineering value by addressing common industrial challenges. The passivated 18-8 stainless steel provides excellent corrosion resistance, making them suitable for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive agents are present. The wide truss head design offers superior clamping force distribution, preventing surface damage on softer materials while maintaining secure fastening. With coarse UNC threads and No. 3 Phillips drive, installation is streamlined in high-volume assembly operations, reducing labor time. The combination of 70,000 psi tensile strength and full threading ensures reliable performance in vibration-prone environments, making these screws ideal for machinery, automotive components, and structural assemblies requiring durable, long-lasting fastening solutions.
Specification Summary & Compliance
This 1/4"-20 UNC screw features Class 2A thread fit for standard industrial applications, with precise dimensional control per ASME B18.6.3 specifications. The fully threaded 3/4" length and coarse thread spacing ensure consistent engagement. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances for safe industrial use.
