S-91263A353 5/16"-24 x 1" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat 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 zinc-plated alloy steel construction for extended service life in harsh industrial environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during installation
- 82° countersink angle enables flush mounting for clean, professional finishes in assembled products
- Full threading along 1" length maximizes grip strength and distributes stress evenly across the fastener
- Hex drive design with 3/16" drive size allows for high-torque installation using standard industrial tools
- Rockwell C39 hardness rating maintains thread integrity and prevents stripping under repeated use
Professional Applications & Engineering Value
These 5/16"-24 UNF flat head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc-plated alloy steel construction protects against oxidation in demanding environments, while the Class 3A fine thread fit ensures precise engagement in critical assemblies. The 82° countersink angle provides seamless integration into machinery, automotive components, and structural frameworks, eliminating protrusions that could interfere with operation. With full threading along the entire 1" length, these industrial screws maintain consistent clamping force across the joint, preventing loosening under vibration and thermal cycling. The combination of ASTM F835 compliance and hex drive configuration makes them ideal for high-stress applications requiring reliable, repeatable fastening performance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNF fine thread specifications. These flat head screws meet ASTM F835 mechanical and dimensional requirements, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications. Features include right-hand threading, 82° countersink angle, and Rockwell C39 hardness for durable, reliable fastening solutions.
