S-94831A680 9/16"-12 Flange Nuts

Flange Nuts

1215FA00048 Flange Nuts
1215FA00048 Flange Nuts

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

Part No.
Part No. 1215FA00048
Equivalent to mcmaster :
94831A680

Basic Information

System of Measurement Inch
Nut Type Flange, Locknut, Hex

Dimension Parameters

Width 7/8"
Height 1/2"

Thread Parameters

Thread Type UNC
Thread Size 9/16"-12
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 3/16"
Flange Thickness 0.05"

Material & Strength Parameters

Material Zinc-Plated Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Locking Type Serrations
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 with serrated locking technology that prevents loosening under dynamic loads
  • Enhanced load distribution through 1 3/16" flange diameter, reducing surface pressure and material damage
  • Corrosion-resistant zinc-plated steel construction for extended service life in harsh industrial environments
  • Quick installation with standard external hex drive and coarse UNC threads for efficient assembly
  • Reliable thread engagement with Class 2B thread fit ensuring consistent performance in right-hand applications
  • Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable operations
  • Heavy-duty locking capability combining flange stability with positive locking serrations

Professional Applications & Engineering Value

This 9/16"-12 UNC serrated flange lock nut delivers critical vibration resistance where conventional fasteners fail. The zinc-plated steel construction provides corrosion protection while maintaining structural integrity in demanding environments like heavy machinery, automotive assemblies, and construction equipment. The serrated locking mechanism bites into mating surfaces, creating permanent friction locking that eliminates the need for additional locking components. With its 1 3/16" flange diameter, it distributes clamp load over a wider area, preventing surface damage to soft materials. The coarse UNC threads and external hex drive enable rapid installation in high-volume production settings, while the Class 2B thread fit ensures reliable engagement without galling or cross-threading issues.

Specification Summary & Compliance

This flange lock nut features 9/16"-12 UNC coarse threads with Class 2B thread fit for standard industrial applications. The external hex drive (7/8" width) and right-hand thread direction follow conventional installation practices. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring hazardous substance restriction compliance. The zinc-plated steel material and serrated locking design meet industry specifications for vibration-resistant fastening solutions in mechanical systems and structural applications.

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