S-92979A249 5/16"-18 x 3/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws
Medium-Strength Grade 5 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
- Enhanced corrosion resistance with zinc-plated steel construction, extending service life in demanding environments.
- Superior load-bearing capacity thanks to Grade 5 strength rating and 110,000 PSI tensile strength for reliable performance under high stress.
- Efficient installation and removal with external hex drive and hex head design, allowing for high torque application with standard tools.
- Excellent thread engagement and vibration resistance from fully threaded UNC coarse pattern, ensuring a secure and durable hold.
- Increased stability and distributed load due to the integrated flange, reducing the risk of surface damage and loosening.
- Consistent dimensional accuracy with Class 2A thread fit, providing reliable interchangeability and ease of assembly.
- Compliance with rigorous industry standards including SAE J429, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel hex head screw is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and corrosion in harsh conditions. The UNC coarse thread and fully threaded design deliver maximum grip and pull-out resistance, making it ideal for heavy machinery, automotive frames, and structural steel connections. The external hex drive facilitates quick, high-torque fastening, reducing installation time while the flanged feature distributes clamping force evenly, preventing damage to softer materials. With a tensile strength of 110,000 PSI and Rockwell C22 hardness, it ensures long-term reliability in high-stress applications, from construction to manufacturing, where failure is not an option.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and adheres to UNC thread standards with a 5/16"-18 thread size and 3/4" length. It meets manufacturing specifications per IFI 111 (SAE J429) for Grade 5 fasteners and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
