S-90409A137 3/8"-16 x 2 1/4" 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 load-bearing capability with 150,000 PSI tensile strength, ideal for high-stress industrial assemblies.
- Superior durability and wear resistance due to Rockwell C32 hardness, extending service life in demanding environments.
- Reliable fastening with coarse UNC threads that resist loosening under vibration and allow for quicker installation.
- Enhanced grip and load distribution from the integrated flange, reducing the need for separate washers.
- Secure and precise thread engagement with Class 2A thread fit, ensuring consistent performance and ease of assembly.
- Robust external hex drive design for high-torque application using standard tools, minimizing stripping risks.
- Compliance with stringent industry standards including SAE J429 and IFI 111, guaranteeing quality and interoperability.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where high tensile strength and vibration resistance are paramount. The steel construction combined with a Rockwell C32 hardness ensures it withstands extreme loads and repetitive stress without deformation. Featuring a 3/8"-16 UNC coarse thread and partial threading, it provides superior holding power in brittle materials and resists loosening in dynamic environments. The external hex drive and flanged head simplify installation while distributing clamp load evenly, reducing point stress and preventing surface damage. Ideal for industrial applications requiring reliable, long-term fastening solutions, this screw delivers consistent performance under rigorous conditions, minimizing maintenance downtime and enhancing structural integrity.
Specification Summary & Compliance
This fastener adheres to precise Class 2A thread fit tolerances and UNC coarse thread standards, ensuring compatibility and ease of assembly. It meets IFI 111 SAE J429 specifications for material and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety for use in regulated environments without hazardous substances.
