4 Way Structural Pipe Connector Joint

(11 customer reviews)


  • HJ-3 is a 4 way black painted metal joint set that consists of (x2) H-2K, (x1) H-4, (x3) M6-25B bolts and (x3) M6-N nuts
  • Often used in the center of structures the HJ-3 allows you to create a four-way pipe intersection when combined with our 28mm pipes with just a 5 mm Allen key
  • This is an ideal choice when making tables and any cube-like structure
  • All our Joint sets are made of steel with E-coated paint which not only is environmentally friendlier, it also creates a lasting finish that will stand up to outdoor environments
  • Don’t forget all our joint sets are 100% Re-tinkable!
  • Fits on 3/4″ EMT conduits (act as an EMT coupling connector) with the use of a EMT-ADPTR34 for every connection. Select the option to automatically add them to your purchase.
In stock, ships next day!
Weight 0.7 lbs
Intended usage

For tinktube pipes (1-1/16 inch), For 3/4" EMT conduits (Adaptor included)

Length inches

2 9/16 in (65 mm)

Width inches

1 5/16 in (33 mm)

Steel thickness inches

1/8 in (2.5 mm)


Hot rolled steel (SPHC)

Steel treatment

Black cathodic electrodeposition (Ecoating)





UV resistance


Corrosion resistance




System operational temperature

-148°F to 572°F (-100°C to 300°C)

3/4'' EMT compatibility

Yes, with an EMT-ADPTR34

1/2'' EMT compatibility


1'' EMT compatiblity


11 reviews for 4 Way Structural Pipe Connector Joint

  1. English

    Michael Finnegan (verified owner)

    usGeorgia, United States

    Excellent products

  2. English

    Gabriel (verified owner)

    usCalifornia, United States

    The tolerances of these fittings are great for allowing adjustment before tightening. Assembly was fast and accurate

  3. English

    Dennis E. (verified owner)

    Able to complete my project easily with this connector.

  4. English

    Andrew S. (verified owner)

    Just what I needed, can’t wait to finish my project.

  5. English

    juvenal cerda (verified owner)


  6. French

    Michel Croteau (verified owner)

  7. English

    Anonymous (verified owner)

  8. French

    Nicolas B. (verified owner)

    Image #1 from Nicolas B.
    Image #2 from Nicolas B.
  9. English

    Michael (verified owner)

    This comment covers all the pieces I bought. Pros: 1 – Well made, 2 – A hybrid of other connectors out there each of which does not do the job by itself, and so corners a fertile market. 3 – Quality is good to very good Cons: 1 – Ease of use: because of trying to balance getting the tube in, interlacing the connector parts tongues, getting the nut and bolt in and staying together, it is a chore. A way to go / option, would be to lengthen the available bolt by 0.25 to 0.3 inches, with or without an option to have the connector ship with the bolts pre-fitted into the connector, opened to their max, so that the throats of the connector would be easily wide enough to accept the EMT without the wings of the connector, or the bolt, falling all over the place 2 – Use: I had to find out by search-and-try that the nuts/bolts used a 5 mm Allen wrench as their method of tightening. I did not find it easily on the website. Mentioning it more boldly to allow the end user to prepare for it either with hand Allen wrenches or ratchet drive bits would be helpful 3 – Cost: a relatively minor quibble. definitely in the most upper decile for hardware of this nature; nice materiel is like that. 4 – The demonstration pictures / videos for some of your more complex items, like hinges, slides, and backstops, etc., do no justice to you and seem not to adequately explain how to use them. At least a couple of detailed you-tubes are in order.

    • English

      Éric (store manager)

      Thank you so much for that comprehensive review Michael. Your points will definitely help us to get better.

  10. French

    Martin B. (verified owner)

    Versatile, solide et facile à installer

  11. English

    Claro Zabala (verified owner)

    Very good product.

Show only reviews in English (8)

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