S-90949A226 5/16"-18 Flange Nuts
Flange Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Flange Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Vibration-resistant locking: Distorted thread design ensures secure, permanent fastening under high-vibration conditions.
- Integrated flange eliminates washers: 11/16" flange diameter distributes load evenly, reducing assembly time and component count.
- Corrosion-resistant black-oxide finish: Steel surface treatment provides durable protection in demanding industrial environments.
- High-strength Grade G construction: Reliable performance for heavy-duty applications requiring consistent clamping force.
- Standard external hex drive: Compatible with common tools for straightforward installation and removal.
- Coarse UNC thread engagement: Faster assembly and reduced cross-threading risk in rugged applications.
- Precision Class 2B thread fit: Ensures smooth, consistent engagement with mating components.
Professional Applications & Engineering Value
This Grade G black-oxide steel flange lock nut delivers critical vibration resistance through its distorted thread technology, preventing loosening in machinery, automotive, and construction equipment where dynamic loads are prevalent. The integrated 11/16" flange acts as a built-in washer, distributing clamp load over a wider surface area to protect soft materials and reduce stress concentrations. Manufactured with UNC coarse threads and Class 2B fit, it ensures rapid installation and reliable performance in high-volume assembly operations. The external hex drive accommodates standard wrenching tools, making it suitable for both maintenance and production environments requiring durable, permanent fastening solutions.
Specification Summary & Compliance
This flange lock nut features 5/16"-18 UNC coarse threads with Class 2B thread fit and right-hand direction. The black-oxide steel construction meets Grade G strength requirements, while the 1/2" width and 23/64" height provide standard dimensional compatibility. Compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental and safety standards are met for industrial applications.
