Bolt Hole Centres For Hull Anodes

Bolt Hole Centres For Hull Anodes

Trying to work out which anode you need based on your bolt hole centres? These are the most common formats with their corresponding part numbers and the size stud that can be fitted. This list is not exhaustive and there are many other variations available. We can accommodate most requirements, so please get in touch if you can’t find what you need.

Commonly Used Bolt Hole Centres For Hull Anodes

The following anodes are predominantly in zinc, with their counterparts in aluminium or magnesium listed where available.  These are listed in ascending weight order wherever possible. CLICK ON THE ORANGE HIGHLIGHTED LINKS OR ENTER THE PART NUMBER IN THE SEARCH BOX TO FIND THE ANODE YOU NEED.


00220 – M10 studs required. Zinc
00220AL – aluminium


00231 – M16 studs required
00385/1 – 100-135mm MID POINT 117MM – 7mm holes

110mm – 4 inches

00386 – 113-150mm MID POINT 132MM
MINI EURO OR 00269E – Bolt hole length up to 110mm – M10 studs required
00269EMG – magnesium
00269EAL – aluminium
EURO OR 00270E – Bolt holes between 110-210mm – M10 studs required
00270EAL – aluminium
00270EMG – magnesium
00238 – M16 studs required
00236 – M10 studs required

127mm (5 inches)



00221 – M10 studs required. Zinc
TEC-DIVERS-AL – aluminium



200-205mm – 8 inches

00350/B – zinc
00350/BMG – magnesium
00351/2/B – M10 studs required
00351/BAL – aluminium
00351/2/BMG – magnesium
00222 – M10 studs required
EURO OR 00270E – Bolt holes between 110-210mm – M10 studs required – as above
00271E – M10 studs required. Zinc
00271EAL – aluminium
00271EMG – magnesium
00274E – 200-229mm hole centres – M10 studs required for the 200mm fixing
00274EAL – aluminium

229mm – 9 inches (Sunseeker, Fairline, Princess, large yacht type size)

00272E – M16 studs required
00272E – 200-229mm hole centres – M16 studs required for the 229mm fixing
00272EAL – aluminium
00272EMG – magnesium
00273E – M16 studs required
00273EAL – aluminium
00273EMG – magnesium
NACA08-230AL – streamlined aluminium
00274E – 200-229mm hole centres – M10 studs required for the 200mm fixing
00274EAL – aluminium


M10 Bolts

01007 – galvanised steel version
01007SS – stainless steel version

M10 Nuts and Washers

M10NW– bright zinc. These come as standard with the kits above but if you require more or any other other accessory, please contact us

M16 Bolts

01016 – galvanised steel version
01017  – stainless steel version

M16 Nuts and Washers


Bolt on Versus Weld On

Weld On Anodes

Weld on anodes are recommended on vessels where a long life span is required or where the anodes are subject to significant vibration, agitation, abrasion or other physical impact. To ensure continuity and a 100% secure fixing, welded anodes are best.

The welding strap is commonly cast in steel core to the anode for easy fixing. It also has the added advantage of turning into a bolt on anode if you wished to drill your own bolt holes at bespoke bolt centres.

Bolt On Anodes

Bolt on anodes have a wide variety of stud centre and hole diameters to suit all European and American designed boats. Bolt on anodes are a quick and effective way to secure anodes without the need for specialist tools.

When using bolt on anodes it’s good practice to use serrated or fan disc washers. This type of washer ensures there is a good electrical connection between the anode and the structure. As with any fitting, the quality of the studs and metal type should be the best available.

If you can’t find what you’re looking for, please contact us as we have access to over 3000 different types of anode.

Sources and more information can be found here.


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