S-90045A455 5/16"-24 Locknuts

Locknuts

1172FA00020 Locknuts
1172FA00020 Locknuts

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

Part No.
Part No. 1172FA00020
Equivalent to mcmaster :
90045A455

Basic Information

System of Measurement Inch
Nut Type Locknut, Hex

Dimension Parameters

Width 1/2"
Height 17/64"

Thread Parameters

Thread Type UNF
Thread Size 5/16"-24
Thread Direction Right Hand
Thread Spacing Fine
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 Top 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 distorted top lock thread design, preventing loosening in high-stress environments
  • Excellent corrosion resistance with 18-8 stainless steel construction, ensuring long-term durability in harsh conditions
  • Precise thread engagement with Class 2B fit and UNF fine thread spacing for reliable, secure fastening
  • Easy installation and removal using standard tools thanks to the external hex drive design
  • Compliance with environmental regulations including RoHS 3 and REACH, meeting industrial safety standards
  • Right-hand thread direction for standard application compatibility and straightforward assembly
  • Consistent performance in demanding applications due to standardized dimensions (1/2" width, 17/64" height)

Professional Applications & Engineering Value

This 5/16"-24 UNF stainless steel locknut with distorted thread technology addresses critical vibration-induced loosening in industrial machinery, automotive assemblies, and heavy equipment. The 18-8 stainless steel material provides exceptional corrosion resistance, making it ideal for harsh environments where moisture or chemicals are present. The fine UNF thread spacing and Class 2B thread fit ensure precise engagement with mating components, reducing the risk of cross-threading and providing consistent clamping force. With its external hex drive design, maintenance and installation are streamlined using common tools, minimizing downtime in production or repair scenarios. This locknut delivers reliable locking performance while meeting stringent industrial compliance requirements.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards, ensuring dimensional accuracy and compatibility. It adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial applications. The manufacturing follows inch system specifications with a 5/16"-24 UNF fine thread and right-hand direction, providing reliable performance in vibration-prone assemblies.

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