S-97646A251 5/16"-18 x 3/8" 18-8 Stainless Steel Serrated-Flange Hex Head Screws
18-8 Stainless Steel Serrated-Flange Hex Head 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 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced vibration resistance through serrated locking flange design, preventing loosening under dynamic loads
- High tensile strength of 100,000 psi ensures reliable performance in demanding mechanical applications
- Easy installation and removal with external hex drive and standard UNC coarse threading
- Precise Class 2A thread fit guarantees consistent engagement and reduced cross-threading risks
- Full threading along 3/8" length provides maximum grip and load distribution
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw delivers exceptional engineering value through its 18-8 stainless steel composition and flanged serrated design. The material offers excellent corrosion resistance, making it suitable for outdoor equipment, marine hardware, and chemical processing installations where moisture exposure is common. The serrated locking feature beneath the flange bites into mating surfaces, effectively resisting vibration-induced loosening in machinery, automotive assemblies, and structural frameworks. With coarse UNC threading and Class 2A fit, it ensures quick assembly and reliable fastening in both soft and hard materials. The external hex drive allows for high-torque installation using standard tools, while the 11/16" flange diameter distributes clamping force over a wider area, reducing surface damage and improving joint integrity.
Specification Summary & Compliance
This flanged hex head screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threads and fully threaded 3/8" length. Manufactured from 18-8 stainless steel with Rockwell B100 hardness and 100,000 psi tensile strength. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance for industrial and commercial applications.
