S-92316A554 1/4"-20 x 3" 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 load-bearing capacity with 150,000 psi tensile strength for heavy-duty applications requiring maximum reliability.
- Superior corrosion resistance thanks to the black-phosphate steel coating, extending service life in harsh industrial environments.
- Enhanced durability and wear resistance from Rockwell C32 hardness, reducing fastener failure and maintenance needs.
- Secure and stable fastening with the integrated flange design, eliminating the need for separate washers and distributing load evenly.
- Easy installation and removal using the external hex drive and coarse UNC threading, ideal for high-vibration settings.
- Precise thread engagement with Class 2A thread fit, ensuring consistent performance and reducing cross-threading risks.
- Versatile partial threading allowing for adjustable clamping force and secure fastening in varied material thicknesses.
Professional Applications & Engineering Value
Engineered for demanding industrial and mechanical assemblies, this Grade 8 hex head flange screw addresses critical challenges like vibration loosening and corrosion-induced degradation. The black-phosphate steel construction provides a robust barrier against rust and chemical exposure, making it suitable for outdoor equipment, automotive frames, and machinery subjected to harsh conditions. Its UNC coarse thread and partial threading design enhance grip in softer materials and allow for precise tension control, reducing the risk of strip-out under high stress. By integrating a flange, it simplifies assembly, cuts down on component count, and improves joint integrity—key for heavy-duty fastening in construction, manufacturing, and transportation sectors where reliability is non-negotiable.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit tolerances for consistent engagement and meets SAE J429 specifications for Grade 8 mechanical properties. It is manufactured with UNC coarse threading (1/4"-20) and partial threading up to a 3/4" minimum length. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory acceptance in global industrial markets.
