S-91839A132 3/8"-16 Locknuts

Locknuts

1183FA00008 Locknuts
1183FA00008 Locknuts

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

Part No.
Part No. 1183FA00008
Equivalent to mcmaster :
91839A132

Basic Information

System of Measurement Inch
Nut Type Locknut, Hex

Dimension Parameters

Width 9/16"
Height 15/32"

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
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

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
Locking Type Flex-Top
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 innovative Flex-Top locking design that maintains clamp force under dynamic loads
  • Excellent corrosion resistance with 18-8 Stainless Steel construction for extended service life in harsh environments
  • Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
  • Industry-standard compatibility with 3/8"-16 UNC coarse threads for broad application across equipment and machinery
  • Secure locking performance without requiring additional locking elements, reducing assembly time and complexity
  • Standard external hex drive for compatibility with common wrenching tools and straightforward installation
  • Environmental compliance assurance meeting RoHS 3 and REACH standards for regulated industrial applications

Professional Applications & Engineering Value

This 3/8"-16 UNC Flex-Top locknut delivers critical vibration resistance in demanding industrial environments where thread integrity is paramount. The 18-8 Stainless Steel construction provides exceptional corrosion resistance for applications exposed to moisture, chemicals, or outdoor conditions. The innovative Flex-Top locking mechanism creates consistent friction along the thread engagement, effectively preventing loosening from vibration and thermal cycling without compromising Class 2B thread fit precision. This makes it ideal for industrial machinery, automotive assemblies, and vibration-prone equipment where reliable fastening is essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit tolerance for optimal engagement with mating components. Features 3/8"-16 UNC coarse threads with right-hand direction and standard hex profile (9/16" width, 15/32" height). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety for industrial applications worldwide.

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