S-92316A589 5/16"-18 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged 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
- Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance from black-phosphate steel coating extends service life in demanding environments
- Precise Class 2A thread fit provides consistent engagement and reduces installation issues
- Integrated flange design eliminates the need for separate washers while distributing load effectively
- Grade 8 certification guarantees consistent mechanical properties and material quality
- Rockwell C32 hardness maintains thread integrity and prevents stripping during repeated use
- Coarse UNC threading enables faster installation and better performance in vibration-prone applications
Professional Applications & Engineering Value
These Grade 8 hex head screws with black-phosphate coating deliver critical corrosion protection where environmental factors threaten fastener integrity. The partially threaded design with integrated flange provides superior clamping force distribution while eliminating component count. Engineered with coarse UNC threads and Class 2A tolerance, these screws maintain secure fastening in high-vibration machinery, construction equipment, and heavy-duty assemblies. The external hex drive ensures positive torque transmission, preventing tool slippage during high-torque applications. Ideal for structural connections, industrial machinery, and automotive systems requiring 150,000 psi tensile strength with consistent performance under extreme loads.
Specification Summary & Compliance
Manufactured to IFI 111/SAE J429 specifications with Class 2A thread fit tolerance for precise engagement. The 5/16"-18 UNC coarse thread configuration ensures compatibility with standard components. These screws are RoHS 3 (2015/863/EU) compliant and meet REACH (EC 1907/2006) environmental standards. The Grade 8 classification verifies consistent mechanical properties including hardness, tensile strength, and material composition according to established industrial specifications.
