Stainless Steel Threaded Couplings

All Stainless Steel Threaded Couplings for connecting, splicing, or repairing round hollow tube and rod of the corresponding sizes.

Pay close attention to the ID and OD listed below once you make a size selection. Precise measurements are list on the products after making the size selection.

Fits On: select the size of tube or rod the coupling fits on the end of.


Stainless Steel Threaded Couplings for connecting, splicing, or repairing round tube and rod of the corresponding sizes. These all Stainless Steel Couplings are extremely strong. If you require a longer tube or rod and do not want to sacrifice strength these couplings are the solution.

If using these couplers on another manufacturer’s tubes or rods, pay close attention to the ID and OD of the coupler which is listed once you make a nominal size selection.

Many uses include, but not limited to:

  • Shallow Water Anchor
  • Boating Push Pole
  • Mooring Whip
  • Extension Poles

MGS Fiberglass Sizes that work best with our Stainless Couplers:


The best adhesive to use to attach the painters pole attachments to then ends of the fiberglass tubing (or any tube or rod that is smaller than the ID these will accept) is JB Weld, Original Cold-Weld Formula. Mix the epoxy then apply a generous layer around the end of the tubing or rod. Slide on the coupling and allow time to set.

JB Weld Original Cold-Weld Formula, Steel Reinforced 2 part epoxy

One additional method could be used and that is the “pinning” method. Place the part on the end of the tube or rod. With the part “seated” drill a 9/64″ hole through the overlap area. Insert a #6:32 machine screw of the corresponding length to the largest diameter piece being drilled. An illustration of this method is below:

Part Assembly Pinning Method

Wholesale Quantities & Assemblies

Large quantity (wholesale quantities), custom length, custom colors, and limited fabrication services available. Inquire and let us quote on your needs. Contact us with Tube or Rod, outer diameter, lengths, color request or stock color, and what fabrication services you may need (drilling holes through, angle cuts, chamfered ends, pencil points). Please also include your name, organization (if any), address, phone number, email address, and any other information you may wish to provide to help us better quote your needs. Save time and money by letting us deliver your assemblies ready for production. We can help you determine what rod or tube best meets your needs and determine a production time based on when the product is scheduled, any fabrications, etc…

About Max-Gain Systems, Inc.

Max-Gain Systems, Inc. is the number one supplier of fiberglass round hollow tube, square tube and round solid rod to the antenna manufacturing industry. We produce millions of feet a year for hundreds of different industries including but not limited to:  marine / boating, aeronautical, agriculture, construction, emergency services, etc….  We have the unique ability to sell one piece or even a semi-truck full. Feel free to prototype using our fiberglass tube and rod then contact us for a quote on a production run. At production run quantities we can cut to your desired lengths at no additional charge, and we can also perform several different fabrications (example: drilling holes in precise locations along a tube) to ensure your delivered material is ready for assembly. We have several accessory items designed for our fiberglass including but not limited to: couplers, telescoping clamps, ferrules, etc…

Additional information

Shipping Weight N/A
Shipping Dimensions N/A
Female Side Fits

3/4 inch OD Fiberglass, 1 inch OD Fiberglass, 1-1/2 inch OD Fiberglass

Male Side Fits

3/4 inch OD Fiberglass, 1 inch OD Fiberglass, 1-1/2 inch OD Fiberglass


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