S-91831A133 7/16"-14 Locknuts

Locknuts

1146FA00025 Locknuts
1146FA00025 Locknuts

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

Part No.
Part No. 1146FA00025
Equivalent to mcmaster :
91831A133

Basic Information

System of Measurement Inch
Nut Type Locknut, Hex

Dimension Parameters

Width 5/8"
Height 29/64"

Thread Parameters

Thread Type UNC
Thread Size 7/16"-14
Thread Direction Right Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Material & Strength Parameters

Material 18-8 Stainless Steel

Temperature & Environment Parameters

Insert Maximum Temperature 220°F

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Locking Type Nylon Insert
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 the nylon insert, maintaining secure fastening in high-motion environments
  • Excellent corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh or outdoor applications
  • Reliable performance at elevated temperatures with nylon insert rated up to 220°F (104°C)
  • Precise thread engagement with UNC Class 2B thread fit ensuring consistent installation and removal
  • Easy installation and removal using standard wrench tools with the external hex drive design
  • Reusable locking capability allowing multiple installations without significant performance degradation
  • Environmental compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 7/16"-14 nylon insert locknut delivers critical vibration resistance where traditional fasteners fail. Engineered from 18-8 stainless steel, it provides exceptional corrosion resistance for demanding environments including marine, chemical processing, and outdoor equipment. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening under dynamic loads while allowing for multiple installations. With UNC coarse threads and Class 2B thread fit, these locknuts ensure reliable engagement in automotive assemblies, machinery, and structural applications where thermal cycling and vibration are constant challenges. The external hex drive facilitates quick installation with standard tools, reducing assembly time while maintaining secure locking performance up to 220°F.

Specification Summary & Compliance

This locknut features 7/16"-14 UNC coarse threads with Class 2B thread fit for precision engagement. Manufactured to industry standards with 5/8" width and 29/64" height in standard hex profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial fastener applications.

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