S-90909A650 5/16"-18 x 1 1/2" 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 with passivated finish
- High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precise thread engagement ensured by Class 3A coarse UNC threads and full threading for maximum holding power
- Integrated flange design eliminates need for separate washers while distributing load evenly
- Secure hex drive installation with 3/16" drive size providing reliable torque transmission
- Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance
- Right-hand coarse threading enables quick assembly and disassembly in industrial settings
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this 316 stainless steel flanged button head screw delivers exceptional performance where corrosion resistance and mechanical integrity are critical. The combination of Class 3A UNC coarse threads and full threading ensures maximum thread engagement in materials prone to vibration loosening. The integrated flange design provides superior load distribution while eliminating separate washers, reducing assembly time and component count. With its hex drive compatibility and passivated finish, this fastener maintains structural integrity in chemical processing, marine applications, and food equipment where exposure to corrosive elements is common. The rounded button head profile offers a low-profile installation while maintaining high torque capability.
Specification Summary & Compliance
This precision fastener features 5/16"-18 UNC coarse threads with Class 3A fit for superior thread engagement and meets standard dimensional requirements. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The fully threaded design ensures consistent performance across the entire 1-1/2" length, while the 0.688" flange diameter provides optimal bearing surface. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance in structural applications.
