Purchased some fin bolts from these guys recently bloody great value.


http://www.ebay.com.au/itm/Stainless-Steel-PAN-Machine-Bolt-Screws-Nuts-Washers-M6-300pce-G304-Kit/230951618204?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D163%26meid%3D2361937370401981883%26pid%3D100005%26prg%3D1088%26rk%3D2%26rkt%3D4%26sd%3D230947970939%26

You didn't get 304 stainless did you ?

Doesn't 304 corrode in salt water ? Especially if you screw them into brass.

I am sure you need 316 grade to not corrode ??

Nah ideally 408, but don't know where you get them.

From working on sea water plants I can tell you 316 isn't that brilliant, I know there is different qualities.

408 is speced for sea water

Select to expand quote

Carantoc said..

You didn't get 304 stainless did you ?

Doesn't 304 corrode in salt water ? Especially if you screw them into brass.

I am sure you need 316 grade to not corrode ??

I had this question from the local stainless supplier. I ended up buying some 304 and some 316. The price difference was too much for me.

The screws are only in the brass insert for a day at a time, so I doubt there will be much corrosion if any. On the other hand, I have used zinc plated steel a few times, and they don't take too long to corrode at all. Usually in my sail bag after a few days, but I would never leave them in a fin unless I never wanted to get it out.

I sail mainly in fresh water but even if they do corrode got plenty of them

I brought some 6mm zink plated barrel nuts from Bunnings about $3.50 for 4 nuts , used them in one fin and so far so good after 2 months, even if you use them as a quick replacement there better than nothing

This Ebay seller from Greece has plenty of handy parts including boomgrip,batten tensioners,oversized footstrap screws(for stripped inserts),footstrap plugs and europins

chocko thanks for sharing , my box of goodies arrived today and a good match for the zink coated barrel nuts, just have to see which will be the first to corrode first