S-91772A940 1/4"-20 x 5 1/2" 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 with passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term load-bearing performance.
- Easy installation and removal thanks to the Phillips No. 3 drive and UNC coarse threading, reducing assembly time.
- Secure and stable fastening with a rounded pan head design that provides a larger bearing surface and resists cam-out.
- Dimensional reliability with Class 2A thread fit ensuring consistent, precise engagement in tapped holes.
- Versatile partial threading allowing for effective clamping on a wide range of material thicknesses.
- Compliance with major industry standards including ASME B18.6.3, ensuring quality and interchangeability.
Professional Applications & Engineering Value
This 1/4"-20 x 5 1/2" rounded head screw is engineered to address common industrial challenges such as material degradation under stress and environmental exposure. The passivated 18-8 stainless steel offers excellent resistance to oxidation and corrosive elements, making it suitable for outdoor equipment, marine hardware, and food processing machinery. Its UNC coarse thread and partially threaded design ensure quick, secure fastening in applications where vibration resistance is critical, such as in assembly lines, structural frameworks, and heavy-duty enclosures. The combination of 70,000 psi tensile strength and a Phillips drive provides a balance of high clamping force and user-friendly installation, reducing the risk of fastener failure and maintenance downtime in demanding industrial applications.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard tolerance and reliable engagement. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring dimensional accuracy and performance consistency. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.
