S-91770A866 1/4"-20 x 1 5/8" 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
- Enhanced load distribution from the wide truss head design, reducing surface pressure and material damage
- High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical stress
- Easy installation and removal with Phillips No. 3 drive, compatible with standard tools
- Secure coarse UNC threading provides excellent grip and vibration resistance in various materials
- Partial threading design allows for precise clamping force control in assembly applications
- Consistent dimensional accuracy with Class 2A thread fit for reliable interchangeability
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4-20 UNC rounded truss head screws deliver exceptional value in assembly operations where corrosion resistance and structural integrity are critical. The passivated 18-8 stainless steel material prevents oxidation in humid or chemical-exposed environments, while the wide truss head profile distributes clamping force over a larger surface area—preventing damage to soft materials and reducing the risk of loosening under vibration. With partial threading and coarse UNC threads, these screws provide superior holding power in metal, plastic, and composite assemblies, making them ideal for machinery, electrical enclosures, and automotive components where ASME B18.6.3 compliance ensures consistent quality and performance.
Specification Summary & Compliance
This 1/4-20 UNC screw features a Class 2A thread fit for standard tolerance applications, with a minimum thread length of 1-1/2" and overall length of 1-5/8". Manufactured in accordance with ASME B18.6.3 specifications and fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use across global industrial markets.
