S-91770A896 1/4"-28 x 1 1/2" 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 and outdoor applications.
- Enhanced load distribution from the wide truss head design, reducing surface damage and preventing pull-through in softer materials.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration, minimizing failure risks.
- Precise Class 2A thread fit with fine UNF threading for secure, tight fastening and improved resistance to loosening.
- Easy installation and removal with Phillips No. 3 drive, providing efficient torque transfer and reducing tool slippage.
- Full threading along the 1 1/2" length allows for adjustable grip depth and consistent holding power across various material thicknesses.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global supply chain integration.
Professional Applications & Engineering Value
These 1/4-28 UNF rounded truss head screws are engineered to address common industrial challenges, such as corrosion-induced failure and assembly instability. The passivated 18-8 stainless steel offers excellent resistance to moisture, chemicals, and oxidation, extending service life in demanding settings like marine equipment, food processing machinery, and structural frameworks. The fine thread spacing and Class 2A fit ensure tight seals and reduced vibration loosening, critical for precision assemblies. With a Rockwell B70 hardness and robust Phillips No. 3 drive, these screws provide dependable fastening in applications requiring repeated adjustments or high-stress conditions, enhancing overall equipment reliability and reducing maintenance downtime.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit per UNF standards, ensuring dimensional accuracy and interchangeability. It meets ASME B18.6.3 specifications for mechanical and dimensional requirements, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in various industries.
