[Jacques Reed]

Hi Ian,

You may know this, but be careful when buying grease nipples as there are a few types of threads available. Society of Automotive Engineers- Lubrication Thread (SAE-LT) is the type mainly used on cars and trucks. It has a tapered thread to form a tight seal and is screwed into a parallel sided UNF tapped hole.

There are also Metric threads, BSP threads and NPT threads available. Some are not tapered either. Some are close in size but will not seal or tighten up, and more likely strip the threaded hole. Australia prefers BSP pipe sizes with Metric sizes on Chinese stuff, and the US prefers NPT pipe sizes.

If you have an original sample best to match the thread type up to that.

Hope this is of some help to you and others. I learnt this the hard way ordering grease nipples on my Korean built ship with British, Chinese, and Japanese machinery on board. Think she went to the breakers with a few boxes of unused wrong type grease fittings on board!

Cheers,