S-90909A526 1/4"-20 x 3/8" 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 thanks to 316 stainless steel construction and passivated finish, ideal for harsh chemical and marine environments.
- High-strength performance with a 70,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable load-bearing capability.
- Precise and secure fastening achieved with a Class 3A thread fit and UNC coarse threading, reducing the risk of cross-threading and vibration loosening.
- Efficient installation and removal provided by the 5/32" hex drive and flanged button head design, which eliminates the need for a separate washer.
- Enhanced durability and longevity from the fully threaded, right-hand design, offering consistent clamping force across the entire length.
- Compliance with strict environmental regulations, being RoHS 3 and REACH compliant for use in regulated industrial sectors.
Professional Applications & Engineering Value
This 316 stainless steel flanged button head screw is engineered to solve critical challenges in demanding industrial settings. Its passivated finish and 316 grade material provide exceptional resistance to chlorides and acidic conditions, preventing failure in chemical processing, marine, and food industry equipment. The integrated flange distributes clamping pressure over a wider area, protecting soft materials and reducing assembly components. Combined with the UNC coarse thread and Class 3A fit, it ensures rapid, vibration-resistant installations in machinery, structural frames, and outdoor enclosures where reliability and corrosion resistance are non-negotiable.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensions include a 1/4"-20 thread size with coarse spacing, 3/8" length, and 0.56" flange diameter. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances for safe use in global industrial applications.
