S-95355A294 1 1/2"-6 Hex Nuts

Hex Nuts

0890FA00021 Hex Nuts
0890FA00021 Hex Nuts

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

Part No.
Part No. 0890FA00021
Equivalent to mcmaster :
95355A294

Basic Information

System of Measurement Inch
Nut Type Hex

Dimension Parameters

Width 2 1/4"
Height 1 9/32"

Thread Parameters

Thread Type UNC
Thread Size 1 1/2"-6
Thread Direction Left Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Material & Strength Parameters

Material 316 Stainless Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
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 corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments including marine and chemical applications
  • Reliable reverse-thread security through left-hand threading prevents loosening in counter-rotating machinery and equipment
  • Optimized load distribution with UNC coarse thread profile ensures secure fastening in high-vibration industrial settings
  • Precision thread engagement with Class 2B fit provides consistent clamping force and reduces cross-threading risks
  • Easy installation and removal using standard wrench tools thanks to the external hex drive and standard profile design
  • Heavy-duty performance with 2 1/4" width and 1 9/32" height dimensions for demanding structural applications
  • Environmental compliance assurance with RoHS 3 (2015/863/EU) compliance for safe use in regulated industries

Professional Applications & Engineering Value

This heavy-duty left hand thread hex nut delivers critical engineering solutions where standard right-hand threads would compromise safety. The 316 Stainless Steel composition provides exceptional corrosion resistance against chlorides and industrial chemicals, making it ideal for marine equipment, chemical processing plants, and offshore installations. The UNC coarse thread with Class 2B fit ensures rapid assembly in high-vibration environments while maintaining precise thread engagement. The external hex drive allows for high-torque installation using common industrial tools, while the reverse threading prevents accidental loosening in rotating machinery, conveyor systems, and pump assemblies where counter-rotation occurs. This combination of material properties and thread design addresses common failure points in demanding industrial applications.

Specification Summary & Compliance

This hex nut features 1 1/2"-6 UNC left hand thread with coarse spacing and Class 2B thread fit per ASME B1.1 standards. Dimensions include 2 1/4" width across flats and 1 9/32" height. Manufactured from 316 Stainless Steel with standard hex profile and external drive style. The product is RoHS 3 (2015/863/EU) compliant and meets industry standards for inch system fasteners in industrial applications.

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