To join two pieces of threaded material, use Hex Coupler Nuts. Right-hand threading is used for hex and heavy hex couplers. If a right-left coupler is required, a sleeve nut can be an option.
For information on the appropriate hex coupler for a certain grade of bolt, consult our nut compatibility chart. Galvanized couplers are tapped oversize to account for the corrosion-resistant coating on the bolts since hot-dip galvanising generally adds 2.2 to 5 mils of thickness to the threaded part of a fastener.
When joining two threaded rods or pipes, particularly those of various diameters, coupling nuts, also known as extension nuts, are employed. The most typical uses for coupling nuts include tightening rod assemblies or pushing a finished rod assembly outward. They are often made in a hex form for wrench grip.
Since the two ends are tapped independently, a continuous thread may not always form where they meet. This implies that except by accident, you usually can’t attach the coupling nut to a fastener past the coupling nut’s center line. Just so happens that the internal threads are aligned.
| Nominal Size | F | C | H | Part Numbers | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Width Across Flats | Width Across Corners | Length/Thickness | Import | |||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | Plain | Galvanized | |
| 1⁄2 | 11⁄16 | 0.688 | 0.663 | 0.794 | 0.756 | 13⁄4 | 1.760 | 1.690 | 12338 | 17525 |
| 5⁄8 | 13⁄16 | 0.813 | 0.782 | 0.939 | 0.891 | 21⁄8 | 2.135 | 2.067 | 12559 | 18195 |
| 3⁄4 | 1 | 1.000 | 0.963 | 1.155 | 1.097 | 21⁄4 | 2.260 | 2.190 | 12557 | 17526 |
| 7⁄8 | 11⁄4 | 1.250 | 1.212 | 1.443 | 1.382 | 21⁄2 | 2.510 | 2.440 | 12558 | 19504 |
| 1 | 13⁄8 | 1.375 | 1.325 | 1.588 | 1.511 | 23⁄4 | 2.760 | 2.690 | – | 18494 |
| 11⁄8 | 11⁄2 | 1.500 | 1.450 | 1.732 | 1.653 | 3 | 3.010 | 2.940 | 18394 | – |
| 11⁄4 | 15⁄8 | 1.625 | 1.575 | 1.876 | 1.825 | 3 | 3.010 | 2.940 | 18994 | 17529 |
| 11⁄2 | 2 | 2.000 | 1.950 | 2.309 | 2.275 | 31⁄2 | 3.510 | 3.440 | – | – |
| Dimensions per ASME B18.2.2 2010 Some dimensions may vary by supplier |
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To link any two threaded fasteners, such as threaded rod, hex coupling nuts or hex spacers are lengthy nuts that are typically three times the size of the nut.
Metric: Dia M5 – M48
Imperial: Dia 1/4″ – 7/8″
Threads: Metric Coarse & Imperial BSW
Strength: Mild Steel, Class 5, 8, Grade 2 & A4-70
Material/Finish: Zinc Plated, Zinc Yellow, Hot Dip Galvanised & Stainless Steel
Compliance: DIN 6334
Sample Time: Available in 5-10 days for different items.
Drawing Format: CAD / PDF / DWG / IGS / STEP.
Packaging: Standard package, Carton box or Pallet, As per customized specifications
Shipping: DHL, FEDEX, UPS and By Sea or as per client’s requirements.
We can manufacture and export Brass Products as per specifications (custom drawing and samples) for more information, please
