S-92979A157 5/16"-18 x 7/8" 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
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Exceptional load-bearing capacity with 110,000 psi tensile strength, ideal for heavy-duty industrial applications
- Precision thread engagement with Class 3A fit and UNC coarse threading for reliable, vibration-resistant connections
- Enhanced installation efficiency with external hex drive and flanged design that eliminates the need for separate washers
- Consistent hardness performance with Rockwell C25 rating ensuring dimensional stability under stress
- Full-threaded design providing maximum grip length and uniform stress distribution along the entire fastener
- Regulatory compliance assurance meeting both industry standards and environmental regulations for global supply chain compatibility
Professional Applications & Engineering Value
These Grade 5 zinc-plated steel hex head screws deliver critical performance in industrial assembly where vibration resistance and corrosion protection are paramount. The UNC coarse threading combined with Class 3A thread fit ensures rapid installation and secure fastening in machinery, structural frameworks, and equipment manufacturing. The flanged design provides distributed bearing pressure, reducing surface damage while the external hex drive accommodates high-torque applications. With 110,000 psi tensile strength and Rockwell C25 hardness, these fully threaded fasteners maintain integrity in high-stress environments, making them ideal for automotive, construction, and heavy equipment applications where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse threading (5/16"-18). Complies with IFI 111/SAE J429 specifications for Grade 5 fasteners. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features include: 7/8" length, 1/2" head width, 11/16" flange diameter, and right-hand thread orientation.
