S-90949A110 5/8"-11 Flange Nuts

Flange Nuts

1226FA00008 Flange Nuts
1226FA00008 Flange Nuts

Image may differ from product. See technical specification for details.

Part No.
Part No. 1226FA00008
Equivalent to mcmaster :
90949A110

Basic Information

System of Measurement Inch
Nut Type Flange, Locknut, Hex

Dimension Parameters

Width 15/16"
Height 11/16"

Thread Parameters

Thread Type UNC
Thread Size 5/8"-11
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 1 21/64"
Flange Thickness 0.1"

Material & Strength Parameters

Material Black-Phosphate Steel
Strength Class Grade G

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Locking Type Distorted Thread
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior vibration resistance through distorted thread locking technology, preventing loosening under dynamic loads
  • Enhanced corrosion protection with black-phosphate steel coating, extending service life in harsh environments
  • Integrated flange design with 1 21/64" diameter distributes load pressure, eliminating need for separate washers
  • Reliable coarse UNC threading (5/8"-11) enables faster installation and reduced cross-threading risk
  • Precision Class 2B thread fit ensures consistent engagement and optimal clamping force retention
  • External hex drive compatibility with standard 15/16" width for common tooling and torque application
  • Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This Grade G flange lock nut addresses critical vibration-induced failure points in heavy machinery, automotive assemblies, and structural frameworks. The distorted thread locking mechanism creates permanent friction resistance without compromising UNC coarse thread engagement, maintaining clamp load under extreme cyclic stresses. Manufactured from black-phosphate steel, it provides 300+ hours of salt spray protection while the integrated 1 21/64" flange eliminates washer migration issues. Ideal for right-hand thread applications requiring repeated disassembly, the external hex drive accommodates high-torque installation in confined spaces common to conveyor systems, agricultural equipment, and renewable energy infrastructure.

Specification Summary & Compliance

Manufactured to Class 2B thread tolerances per ASME B1.1 standards with 5/8"-11 UNC coarse threads and right-hand orientation. The black-phosphate surface treatment meets MIL-DTL-16232 specifications for corrosion resistance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no SVHC above 0.1% weight concentration. Grade G material certification ensures consistent mechanical properties across production batches.

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