S-95355A293 1 1/4"-12 Hex Nuts

Hex Nuts

0890FA00020 Hex Nuts
0890FA00020 Hex Nuts

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

Part No.
Part No. 0890FA00020
Equivalent to mcmaster :
95355A293

Basic Information

System of Measurement Inch
Nut Type Hex

Dimension Parameters

Width 1 7/8"
Height 1 1/16"

Thread Parameters

Thread Type UNF
Thread Size 1 1/4"-12
Thread Direction Left Hand
Thread Spacing Fine
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

  • Exceptional corrosion resistance in harsh environments thanks to 316 Stainless Steel construction
  • Secure and precise fit with Class 2B thread tolerance ensuring reliable engagement and vibration resistance
  • Superior performance in specialized applications due to the left-hand thread direction, preventing loosening under counter-clockwise rotation
  • Optimized for fine-thread requirements with a 1 1/4"-12 UNF thread, offering increased strength and better adjustment in precision assemblies
  • Easy installation and removal with a standard external hex drive profile and 1 7/8" width for common tool compatibility
  • Durable and robust design with a 1 1/16" height providing a solid, stable connection in demanding industrial settings
  • Compliance with environmental standards through RoHS 3 compliance, ensuring safety and regulatory adherence for global markets

Professional Applications & Engineering Value

This left-hand thread hex nut is engineered to address critical challenges in machinery and equipment where reverse rotation is a concern. The 316 Stainless Steel material provides outstanding resistance to corrosion from chemicals, saltwater, and extreme temperatures, making it ideal for marine, chemical processing, and food industry applications. The UNF fine thread and Class 2B fit deliver enhanced clamping force and reduced risk of thread stripping, ensuring long-term reliability in high-vibration environments like automotive assemblies or rotating shafts. By incorporating a left-hand thread, it prevents unintended loosening in systems with counter-clockwise motion, offering a dependable fastening solution for specialized industrial and engineering needs.

Specification Summary & Compliance

This hex nut adheres to UNF (Unified National Fine) thread standards with a Class 2B thread fit for consistent dimensional accuracy. Manufactured to standard industrial specifications for inch system components, it ensures compatibility with corresponding left-hand threaded bolts. The product is RoHS 3 (2015/863/EU) compliant, confirming it is free from hazardous substances and suitable for use in regulated industries.

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