S-93345A236 3/4"-10 x 2 1/4" Coupling Nuts

Coupling Nuts

0978FA00005 Coupling Nuts
0978FA00005 Coupling Nuts

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

Part No.
Part No. 0978FA00005
Equivalent to mcmaster :
93345A236

Basic Information

System of Measurement Inch
Nut Type Coupling, Hex

Dimension Parameters

Width 1"
Length 2 1/4"

Thread Parameters

Thread Type UNC
Thread Size 3/4"-10
Threading Fully Threaded
Thread Direction Left Hand
Thread Spacing Coarse
Thread Fit Class 2B

Head Parameters

Drive Style External Hex
Coupling Nut Profile Standard

Material & Strength Parameters

Material Zinc-Plated Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2022, 223 SVHC) 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

  • Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
  • Secure left-hand thread engagement for specialized applications requiring reverse-direction fastening to prevent loosening under counter-clockwise rotation
  • Precise Class 2B thread fit guarantees smooth assembly and consistent performance with mating components
  • External hex drive design enables easy installation and removal using standard tools, reducing labor time
  • Full threading along the 2 1/4" length provides maximum grip strength and uniform load distribution
  • Robust 1" width profile offers superior torque resistance for heavy-duty coupling applications
  • Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This 3/4"-10 UNC left-hand coupling nut delivers critical engineering solutions where standard right-hand threads would compromise safety. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, machinery, and automotive assemblies exposed to moisture. With coarse UNC threading and Class 2B fit, it maintains reliable connections in high-vibration environments while the external hex drive simplifies maintenance in confined spaces. Ideal for rotating shaft couplings, conveyor systems, and specialized machinery requiring left-hand thread fasteners that resist unintended disassembly under operational stresses.

Specification Summary & Compliance

Manufactured to precise inch system dimensions: 3/4"-10 UNC coarse thread with Class 2B tolerance for optimal fit. Features standard coupling nut profile with 1" width and 2 1/4" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting industrial safety standards for hazardous substance restrictions.

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