.

.

These are nice and 316ss with wire gate.

https://team-tough.com/10-mm-closed-eye-wire-gate-carabiners

And rams horn (pig tail) is another option, with no moving parts.

https://team-tough.com/10mm-pig-tail-lower-off 

These are being used at RRG
Notice that the gate is wire gate

https://climbtech.com/products/top-anchor-hook/

Edit  - it's been pointed out that I can't read too good - request was for SS, this is not. Here is another link, definitely not as beefy, but still captive eye with the insert
https://trango.com/collections/carabiners/products/steel-wiregate

https://climbtech.com/products/top-anchor-hook/ 

+1 

These things are certainly a good choice and seem to hold up really well in moist environments and are superb in high use/wear areas.  But they are not stainless and are currently out of stock (says they should be available by 9/30). 

I bought some of the US Stainless 3/8 wiregates. Seem great. Gates are very stiff though. Maybe best for anchors that have good stances/holds to clip from? Dont think they would be suitable for perma draws.

For low(er) wear routes where corrosion is a top issue, the Ramshorn option is BY FAR the best and most cost efficient way to do things.  No moving parts, 316SS and no need for QLs which also saves on costs significantly.  If I could choose just one anchor, it would be an inline ramshorn with 4 link chain setup from Team-Tough/Bolt Products.  Note you can also rig this for normal mech bolts.   

The US Stainless 3/8 options seems to be your best best cost wise that I've run into in the "curved eye" style we typically see.  AustriaAlpin makes a really nice SS wire gate with captive pin but they're more expensive and, AFAIK, not available in the US. I looked for some fixed chain draws but never could find a source.  13Euro  

A THIRD Option would be the Euro Anchor from Raumer, again, sourcing not easy.  These are essentially 13mm 316SS quality Drop Ins.

Fixe also sells the draco in stainless iirc might be pricey though 

Zackswrote:

Fixe also sells the draco in stainless iirc might be pricey though 

Pricey and solid gate which would certainly be a weak point given OPs location description.  Wire Gates only if outside IMO.

Lil Man, how much does one of those setups cost? (US SS biner+QL)?

I upgraded the bolts on "Just another pretty Face" at the Lower Meadow couple of weeks ago. 100 % hole re-use. I would not choose that spacing for side to side, but its been ok for 30 years so I guess its ok. The sandstone is quite good at the meadow. BTW the protection bolts are all glue ins. I used stainless five piece for the anchor to help do the rest of the work.

Those biners are long relative to a ring or something else. A real advantage on a side by side.

Little Man wrote:

Andy, I have been away from this site for a while. I bought the 5/16 316 stainless chain for a little over a $1 per foot. That price is way less than normal so I bought up 200ft. It was from a liquidation seller. Watch different market sites and look for industrial/construction overstock or liquidations. I think the quicklinks came out to $2 a piece when I bought in bulk from another liquidation type seller. The US Stainless carabiners were $4-5 if I remember correctly. I'd say roughly $10-12 in this set up per chain anchor (excluding bolt and hanger). In this specific location, I used two chain anchors as pictured above with one shorter than the other with offset bolts (not horizontal) and had one just a little longer than the other so that the rope really only wears on one carabiner while the other is there for redundancy and you get zero rope twist. With 5" x 1/2" KB-TZ SS bolts, Climbtech SS Hangers, and the chains, a full anchor station was roughly $40. It's definitely more costly than other set ups I most often do, but given the steepness of the routes and the theoretical longevity of the anchor, I think it was worth the cost.   

Yeah, a little pricey but sounds long term bomber. Down here in the not so sandy Tucson desert that setup sounds nearly eternal