S-90047A125 3/8"-16 Locknuts

Locknuts

1178FA00005 Locknuts
1178FA00005 Locknuts

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

Part No.
Part No. 1178FA00005
Equivalent to mcmaster :
90047A125

Basic Information

System of Measurement Inch
Nut Type Locknut, Hex

Dimension Parameters

Width 9/16"
Height 21/64"

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

Installation & Application Parameters

Distorted Thread Type Center Lock

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 center lock distorted thread technology that maintains tension under extreme conditions
  • Exceptional corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
  • Reliable thread engagement with Class 2B thread fit ensuring consistent, secure fastening across applications
  • Industry-standard compatibility with 3/8"-16 UNC coarse threads for broad application across equipment and machinery
  • Easy installation and removal using standard external hex drive for efficient maintenance and serviceability
  • Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial use
  • Optimized dimensional stability with precise 9/16" width and 21/64" height for consistent performance in assembly applications

Professional Applications & Engineering Value

This 18-8 stainless steel locknut with center lock distorted thread technology addresses critical vibration-induced loosening challenges in industrial environments. The distorted thread design creates controlled interference that maintains clamping force under continuous stress, making it ideal for machinery, automotive assemblies, and equipment subjected to dynamic loads. The corrosion-resistant properties of 18-8 stainless steel ensure reliable performance in moisture-prone applications while the UNC coarse thread profile provides quick assembly and disassembly. Engineered for industrial locknut applications requiring dependable, long-term fastening solutions, this component delivers consistent performance in manufacturing, transportation, and heavy equipment sectors where vibration resistance is paramount.

Specification Summary & Compliance

This locknut features Class 2B thread fit tolerance for reliable engagement with mating components and complies with UNC coarse thread standards (3/8"-16). The manufacturing process adheres to strict quality controls ensuring dimensional accuracy with specified 9/16" width and 21/64" height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial fasteners. The right-hand thread direction and external hex drive style provide industry-standard installation compatibility across various applications.

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