S-91770A865 1/4"-20 x 1 1/8" 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 security through wide truss head design that distributes pressure and resists pull-through
- Quick installation efficiency with No. 3 Phillips drive that prevents cam-out and maintains tool engagement
- Precision thread compatibility with Class 2A UNC coarse threads ensuring consistent engagement and vibration resistance
- Full-threaded design providing maximum grip length and uniform stress distribution across applications
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global use
Professional Applications & Engineering Value
These 1/4-20 UNC fully threaded screws deliver critical performance where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against rust and chemical exposure in manufacturing, marine, and outdoor applications. The rounded truss head with wide profile offers superior clamping force distribution, preventing surface damage while the No. 3 Phillips drive ensures efficient installation without stripping. With 70,000 psi tensile strength and Class 2A thread fit, these industrial screws maintain secure fastening under vibration and heavy loads, making them ideal for machinery assembly, electrical enclosures, and structural frameworks where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with 1/4"-20 UNC coarse threads and Class 2A thread fit tolerance for consistent performance. Fully compliant with ASME B18.6.3 manufacturing specifications, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety standards. Features right-hand threading and fully threaded design for maximum engagement across the entire 1-1/8" length.
