Adapters for grease gun - where to find, sizes, etc.

Mar 08, 2025 Last reply: 1 year ago 1 Replies

I want to replace the clumsy and difficult to use screw down greaser on my boat with a simple, bog-standard, grease gun.



The existing greaser is somewhat like this one (maybe I should sell mine!).

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It has a flexible pipe on it with a connection that screws onto the greaser with a 19mm (or a tiny fraction under according to my calipers) nut. There's a reducing adapter on the side of the greaser reducing the size of the greaser outlet to match the connection on the end of the flexible pipe.



I'd like to simply attach a standard, cartridge refillable, grease gun to the end of the flexible pipe.



What is the likely thread on that nut on the end of the flexible pipe? (Yes, I know, how long ias a piece of string). It's quite likely to be a non-metric size I think but I'm not really sure. I can detach the pipe and measure but it would be nice to know what my measurements might be and what they indicate. It's rather inaccessible so a close look is decidedly awkward.



Where am I likely to be able to get an adapter to go from the grease gun to the pipe?



This isn't particularly high pressure application, it just pushes grease into the stuffing box that stops (hopefully) water coming up round the prop shaft into the boat.


I've measured a few more things.

I'm pretty certain the grease gun I'm going to use (and most grease guns in fact) is 1/8" NPT (or is it more likely to be the UK equivalent, it is made in UK).

The connection on the pipe has, as I said, a 19mm AF nut. The thread onto which that connects is 15.85mm outside diameter according to my calipers. I can't really come up with a pipe thread that matches that, any ideas anyone? It is a parallel thread and it's a union type connection, not a 'pipe' thread one.

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