S-90636A114 3/8"-16 Locknuts

Locknuts

1174FA00021 Locknuts
1174FA00021 Locknuts

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

Part No.
Part No. 1174FA00021
Equivalent to mcmaster :
90636A114

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 Black-Oxide Steel
Strength Class Grade 8

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

  • Exceptional vibration resistance through center-lock distorted thread design, preventing loosening in high-stress environments
  • Superior durability with Grade 8 steel construction, ensuring reliable performance in heavy-duty applications
  • Enhanced corrosion protection from black-oxide coating, extending service life in industrial conditions
  • Easy installation and removal with standard external hex drive design, compatible with common tools
  • Precise thread engagement with UNC coarse 3/8"-16 threads and Class 2B fit, providing secure fastening
  • Regulatory compliance assurance meeting REACH and RoHS 3 standards for safe industrial use
  • Optimal dimensional stability with 9/16" width and 21/64" height for consistent performance across applications

Professional Applications & Engineering Value

This Grade 8 black-oxide steel locknut delivers critical vibration resistance where conventional fasteners fail. The center-lock distorted thread technology creates controlled interference along the UNC coarse thread profile, maintaining clamp force under extreme dynamic loads. Engineered for heavy-duty industrial applications including machinery, automotive assemblies, and construction equipment, the external hex drive ensures straightforward installation while the black-oxide surface treatment provides essential corrosion protection in demanding environments. The combination of distorted thread locking mechanism and high-strength Grade 8 material addresses common failure points in vibration-prone systems, delivering reliable performance where safety and durability are paramount.

Specification Summary & Compliance

This 3/8"-16 UNC locknut features Class 2B thread fit for precise dimensional accuracy and reliable engagement. Manufactured to industry standards with right-hand coarse threads and center-lock distorted thread configuration. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental safety and industrial suitability. Dimensions include 9/16" width and 21/64" height for consistent performance across applications requiring vibration-resistant locking solutions.

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