M6 x 18mm Coupling Nut – DIN 6334 (Long) Zinc Plated

Long hex coupling nuts for joining threaded rods and studs, providing deep thread engagement and secure connections in mechanical and structural assemblies.

Key Benefits & Features

• Long hex design: DIN 6334 coupling nuts are long hex nuts with internal machine screw threads; their length is roughly three times the nominal size.
• Joins threaded fasteners: Used to couple two like sized externally threaded fasteners, such as hanger bolts with threaded rod, to form a longer assembly.
• Right hand coarse threads: Both ends have right hand threads and coarse pitch is standard; thread tolerance for plated nuts is 6H.
• Versatile material options: Available in Class 6 steel with zinc plated.
• Hex shape for easy tool access: The elongated hexagonal shape accommodates a spanner or wrench for tightening and loosening.
• Acts as spacer/standoff: Because of their length, coupling nuts can also function as spacers or standoffs in assemblies.
• Wide size range: Metric sizes.

Use Cases

• Extending threaded rods in construction and scaffolding
• Joining studs or hanger bolts in machinery and equipment
• Creating tie rod assemblies and adjustable braces
• Acting as spacers or standoffs in fabrication projects
• Repairing or adapting threaded components in automotive, and DIY tasks

Compatibility / Fittings

• Matches threaded rods, studs and bolts of the same diameter and pitch; ensure both male threads are clean and free of burrs.
• Suitable for use with flat washers to distribute load or with jam nuts for added security.
• Compatible with standard spanner or socket sizes.

Installation & Tips

• Select the correct size to match your threaded rod or bolt; the inner thread diameter and pitch must be identical.
• Deburr the ends of rods before threading into the coupling nut to prevent cross threading.
• Hand start each rod to ensure proper alignment, then tighten with a spanner.
• Thread each rod into the coupling nut at least equal to its diameter for maximum strength.
• For long assemblies or vibration prone applications, consider applying a thread locking compound.