S-90652A040 3/8"-16 Locknuts

Locknuts

1155FA00003 Locknuts
1155FA00003 Locknuts

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

Part No.
Part No. 1155FA00003
Equivalent to mcmaster :
90652A040

Basic Information

System of Measurement Inch
Nut Type Locknut, Hex

Dimension Parameters

Width 11/16"
Height 13/32"

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 Extra-Wide Thin

Material & Strength Parameters

Material Zinc-Plated Steel

Temperature & Environment Parameters

Insert Maximum Temperature 250°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 with a nylon insert that maintains locking force in high-motion applications
  • Enhanced durability in harsh environments due to zinc-plated steel construction providing corrosion resistance
  • Easy installation and removal with an extra-wide thin hex profile offering better tool grip and accessibility
  • Reliable performance up to 250°F, making it suitable for moderate temperature industrial settings
  • Precise thread engagement with Class 2B fit ensuring consistent, secure fastening without cross-threading
  • Broad compatibility with UNC coarse 3/8"-16 threads for common right-hand assembly systems
  • Compliance with environmental standards, including RoHS 3 and REACH, for safe, sustainable use

Professional Applications & Engineering Value

This 3/8"-16 UNC nylon insert lock nut is engineered to address critical challenges in industrial and mechanical assemblies where vibration loosening can compromise safety and performance. The zinc-plated steel material offers excellent corrosion protection, extending service life in demanding conditions like automotive, machinery, and construction equipment. The extra-wide thin hex profile allows for efficient torque application with standard wrenches, reducing installation time and improving reliability. By incorporating a nylon insert locking mechanism, it effectively dampens vibrations and maintains clamp load, preventing unintentional loosening in dynamic applications. Ideal for heavy-duty fastening in sectors requiring consistent, long-term performance, this lock nut ensures operational integrity while meeting stringent RoHS and REACH compliance for environmental safety.

Specification Summary & Compliance

This lock nut features a 3/8"-16 UNC coarse thread with Class 2B thread fit for precise dimensional accuracy and smooth assembly. It adheres to standard manufacturing specifications for external hex drive and right-hand thread direction, ensuring broad compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industries without hazardous substances.

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