Author Topic: .25 caliber, Benjamin Breach O-ring (Read 566 times)

Alan · « **on:** October 22, 2018, 12:46:05 PM »

I think the standard number is 020, but I can't find my notes. It is .25 ID, and .375 OD. Turns out, this is the same o-ring that fits inside a female Foster fitting. And I don't know if Viton or Nitrile is the best material is use.

A little help if you don't mind.

sixshootertexan · « **Reply #1 on:** October 22, 2018, 01:18:45 PM »

#10 Some say a buna last longer than the OEM. I don't know I don't own a Mrod.

Alan · « **Reply #2 on:** October 22, 2018, 03:31:30 PM »

I knew I liked you!

Thanks rick.

sixshootertexan · « **Reply #3 on:** October 23, 2018, 04:05:11 AM »

I know I'm running a buna oring in my .308 and have had no issues. I just keep a little silicon oil on it. I use rc shock oil.

caniborrowsomeammo · « **Reply #4 on:** October 23, 2018, 08:39:09 AM »

Urethane will last longer and stay in place better than Buna when it comes that day you pull the trigger on an open bolt.

Alan · « **Reply #5 on:** October 23, 2018, 11:46:28 AM »

I don't know what Benjamin uses, but I assume Nitrile. Since I got the correct-sized pellet probe, I haven't lost an o-ring. As I said above, this one was for the Foster fitting. I did use a Benjamin, and it is working well. I bought 100 Buna ones from Amazon, for the same price as I buy about 10 from Benjamin.

And again, thanks guys!