M10 Cable Penetrator for 8mm Cable


This cable penetrator makes a waterproof, high-pressure seal to pass the Fathom Tether or other thick cable into a watertight enclosure. Each set includes a bolt, nut, and O-ring. Some assembly required.

In stock

HS Code: 7616.10.7030

Product Description

This cable penetrator is a simple solution to waterproofing your robot. It’s basically a bolt with a hole that the tether or other thick cable can be glued (potted) into to provide a waterproof, removable connection through watertight enclosures, boxes, panels, etc.

This particular penetrator has a extended length head and nut to make it easy to install and remove on an enclosure, even on densely packed end caps like the 4″ Series 18-Hole end cap. That’s perfect for a tether or other cables that you would like to install and remove frequently.

We primarily recommend the WetLink Thixotropic Potting Compound, which can be applied in one step and provides a depth rating up to 1000 meters. Alternatively, we recommend Loctite Marine Epoxy and the Potting Kit to complete assembly.


  • Extended length head and nut for easy installation/removal
  • Anodized aluminum construction for corrosion resistance and high strength
  • Captive O-ring face seal that works on any smooth surface
  • Wrench flats for easy tightening
  • Multiple inner diameters to secure the cable jacket but leave room for potting compound
  • Works for cables smaller than 8mm as well


  • 1 x 8mm Cable Penetrator Bolt
  • 1 x Cable Penetrator Nut
  • 1 x O-Ring


Recommended Through-Hole Diameter10 mm
Bolt ThreadingM10 x 1.5
Bolt Length25 mm 0.98 in
Bolt Head/Nut Diameter18 mm 0.71 in
Wrench Flats16 mm 5/8 in
O-ringNBR70 AS568-013

3D Models

PENETRATOR-M-BOLT-8MM-10-25-R1 (.zip)

PENETRATOR-M-NUT-10-16-R1 (.zip)

Revision History

4 May 2016

  • R2 – Initial release


Potting a Cable Penetrator

Learn to pot the perfect penetrator to pass a cable into your watertight enclosure!

Watertight Enclosure (WTE) Assembly

Learn the basics of assembling a Watertight Enclosure (WTE)!

Support Community

Blue Robotics Forums – Potting

Blue Robotics Forums – Watertight Enclosures