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Rubber Blind Rivet Nut (Well Nut)

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  • Blind Rivet Nuts
  • Rubber Wall Plug

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From $10 a week. Learn more.

Shop now. Enjoy now. Pay Later.
4 interest-free payments of fortnightly. More info


 Product Description

Manufactured from themoplastic EPDM (a rubber-like material), these clever toggle fasteners have numerous applications. Most often used to secure hardware and other objects to thin steel, aluminium, plywood or fibreglass surfaces where there is no access to the cavity.

With a captive brass nut, the toggle expands within the cavity as it is tightened.  The rubber-like compound provides a seal against water and salt penetration while insulating against vibration.

  • Available in a range of sizes to suit many applications onboard your vessel.
  • Sold individually, with automatic discounts for purchases over 50 units.
  • Note that the nuts have metric threads and the bolt is not supplied.
  • M10 & M12 also available by special order.


SKUThreadGrip (mm)Hole Diam. (mm)Flange Diam. (mm)Flange Height (mm)Overall Length (mm)Torque (Nm)
CBS-360010 M3 0.4 to 4.0 6.2 11.0 1.4 12.6 0.25 - 0.5
CBS-360015 M3 9.5 to 13.0 6.2 14.0 0.9 24.9 0.25 - 0.5
CBS-361015 M4 0.4 to 4.4 8.0 19.1 1.5 14.2 0.25 - 0.4
CBS-361020 M4 8.5 to 15.0 8.0 11.0 1.2 24.0 0.25 - 0.4
CBS-361510 M5 0.4 to 4.9 9.7 12.7 0.9 14.1 0.34 - 0.5
CBS-361520 M5 7.9 to 16.0 9.7 14.0 1.3 26.5 0.3- 0.7
CBS-362010 M6 0.4 to 2.8 12.8 TBC TBC TBC 0.8 - 1.0
CBS-362015 M6 0.8 to 4.7 12.8 19.0 4.75 21.1 0.8 - 1.0
CBS-362020 M6 6.4 to 11.5 12.8 14.0 2.0 26.7 0.8 - 1.0
CBS-362025 M6 11.5 to 23.0 13.1 14.0 1.3 35.0 0.8 - 1.0
CBS-362030 M8 0.4 to 4.0 16.0 21.5 3.2 18.3 1.0 - 1.5
CBS-362035 M8 2.0 to 18.0 18.1 20.5 2.0 30.0 3.0 - 4.0

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 Product Reviews

  1. Good Quality product great service

    Posted by Unknown on 30th May 2022

    I haven't used them yet in my project, but on examination they are of good quality and should achieve the end result.

  2. Great Service

    Posted by Lecia Spaight on 10th Feb 2022

    Needed the product in a hurry - team had it ready within 10 minutes ready for pick up - Thank you

  3. M5 Wellnuts

    Posted by Graham on 25th Jun 2021

    Purchased 10 M5 wellnuts some time ago to check the product, I had purchased simalar ones from Ebay and they were a disaster. The brass wellnut was poorly vulcanised to the rubber and they all failed, all 10 of them.

    I came across the Boat Warehouse with trepidation and they were excellent, very well made and worked superbly on the rebuild of a motorbike adjustable windshield.

    The price was excellent, shipping was awesome so it was a great experience all round. Highly recommended.

    Well done to all at the Boat Warehouse.

  4. 5MM Wellnut

    Posted by Ian Lowcock on 12th Mar 2021

    this item fills it's very well. I needed four of them to replace the originals on my motorbike as the originals polymer bushes had degraded and could no longer secure my windscreen. I rang Boat Warehouse and they dispatched them the same day. I received them the next day. You can't ask for better expedetion than that - and the wellnuts are functioning beautifully.

  5. First Use. Best Use.

    Posted by Henry Milanovic on 5th Feb 2021

    Order delivered promptly and exactly as per order. Great service.

    First time use of this product for fitting extras onto a new kayak.

    Operated exactly as they should and I am a happy kayaker.

  6. Try for my model boats and big fibreglass boat

    Posted by Tony on 13th Jan 2020

    Looks like a nice device for doing some waterproofing screw holes and holding some light things where you want to

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