S-91772A553 1/4"-20 x 2 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan 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 from passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance in demanding applications
- Excellent durability with Rockwell B70 hardness for long service life under mechanical stress
- Precise Class 2A thread fit provides smooth assembly and secure fastening
- Optimized drive engagement with Phillips No. 3 drive for efficient installation and reduced cam-out
- Versatile partial threading allows for adjustable clamping force in various material thicknesses
- Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH standards for global supply chain integration
Professional Applications & Engineering Value
This 1/4-20 UNC threaded screw delivers exceptional engineering value through its passivated 18-8 stainless steel composition and rounded pan head design. The material's inherent corrosion resistance combined with the passivation surface treatment provides critical protection against chemical exposure and atmospheric conditions, making it ideal for industrial equipment, marine applications, and food processing machinery where moisture resistance is paramount. The coarse UNC thread pattern ensures rapid installation in various substrates, while the partial threading allows engineers to optimize grip range without compromising structural integrity. With its Phillips No. 3 drive delivering reliable torque transmission, this fastener solves common assembly challenges in maintenance operations and production lines where speed and reliability are crucial.
Specification Summary & Compliance
This rounded head screw maintains Class 2A thread fit tolerance per UNC standards, ensuring consistent threading performance. Manufacturing specifications strictly adhere to ASME B18.6.3 dimensional requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, validated through current compliance documentation.
