S-90909A528 1/4"-20 x 5/8" Stainless Steel Flanged Button Head Hex-Drive Screws
Stainless Steel Flanged Button Head Hex-Drive 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 in harsh environments due to 316 stainless steel construction and passivated finish
- High tensile strength of 70,000 psi ensures reliable, long-lasting fastening under significant load and stress
- Precise Class 3A thread fit guarantees secure engagement and reduces the risk of cross-threading during assembly
- Integrated flange design eliminates the need for a separate washer, providing a larger bearing surface and faster installation
- Hex drive with 5/32" drive size allows for high-torque application and secure installation with standard tools
- RoHS 3 and REACH compliance ensures environmental safety and meets stringent international regulatory standards
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
Professional Applications & Engineering Value
This 316 stainless steel flanged button head screw is engineered to solve critical challenges in demanding industrial applications. The combination of UNC coarse threads and a Class 3A fit ensures rapid, reliable assembly in machinery, marine hardware, and chemical processing equipment where vibration resistance is paramount. The passivated finish on the 316 stainless steel significantly enhances its resistance to chlorides and acidic environments, preventing premature failure. The integrated flange distributes clamping force effectively, protecting sensitive materials from damage. This makes it an ideal fastener for assembly lines, structural frameworks, and outdoor installations that require a combination of high strength, corrosion resistance, and ease of installation.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with a precision Class 3A thread fit for accurate engagement. It is fully threaded with a length of 5/8" and a flange diameter of 0.56". Manufactured from 316 Stainless Steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring it is free from hazardous substances and safe for use in regulated industries.
