SS Zerks

[xort]

Groco suggests you can replace the drain plug for a SS zerk and grease the seacock plug.
My internet search has, at best, turned up 304 stainless instead of 316.
Grainger only has 440! Defender, Jamestown, West don't show anything in their on-line catalogs.

Any sources for 316 SS zerks? 1/8 - 27 NPT is the drain plug size on all Grocos.

[Quickstep192]

McMaster Carr has them in Monel


McMaster-Carr

[sailingdog]

The only issue with Monel is that it may cause galvanic corrosion issues, depending on what you're putting in into.

[xort]

Mcmaster Carr:
Monel $7.22
303 stainless $1.68

This is for 8 Groco bronze seacocks. Replacing the drain plug with zerks to keep them lubed per Groco's advice.

I've got another source of 304 Stainless at a similar price to the 303.

Too many choices! What to do? What to do?

[xort]

Still looking for ideas

What is the difference between 303, 304 & 316 stainless steel?

[sailingdog]

Originally Posted by xort

Still looking for ideas

What is the difference between 303, 304 & 316 stainless steel?

metal composition and percentages. 316 is the most corrosion resistant of the three....but weakest as well IIRC.

[JHJensen]

Originally Posted by sailingdog

The only issue with Monel is that it may cause galvanic corrosion issues, depending on what you're putting in into.

I doubt monel will cause a problem since it will not be submerged and the business end is covered in grease. Monel is also used for prop shafts if you really want to spend money. It is highly corrosion resistant.

J.