O-ring question from an Old Noob

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graycrait

graycrait

Member
Oct 9, 2015
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Iowa, USA
I tried to ferret out an indexed website that provides source and size of various air rifle O-rings and aftermarket part o-rings. As an air rifle NOOB this has and is not an easy task even though O-rings are the lifeblood of air guns.

Here is my latest issue. I have a Huma Quick Fill adapter for an S200 that the O-ring failed. The adapter does not come with a replacement o-ring. I find it off putting that sourcing a replacement is a time consuming issue.
 
graycrait said:
I tried to ferret out an indexed website that provides source and size of various air rifle O-rings and aftermarket part o-rings. As an air rifle NOOB this has and is not an easy task even though O-rings are the lifeblood of air guns.

Here is my latest issue. I have a Huma Quick Fill adapter for an S200 that the O-ring failed. The adapter does not come with a replacement o-ring. I find it off putting that sourcing a replacement is a time consuming issue.
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Just go on amazon i an o-ring kit i think it was like 15 bucks and i got 300 of them all diffrent sizes with a chart bin using them for a long time with no problems hope this helps
 
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I have two assortments of O-rings I bought off Amazon. They come in handy sometimes but most are not the size my guns need. I've ordered many O-rings from the O-ring store (www.theoringstore.com). Their website is a little daunting at first because they have a wide variety of O-rings. But it is well organized. They also have explanations of the different materials. I use some digital calipers to measure the outside of the old O-ring and the thickness of the O-ring. From that I order.

A caution, however. I have ordered the wrong size more than once because I was thinking OD and missed that the vendor was talking about ID. I hate this kind of nonsense but it is what it is. My other tip is if I don't have exactly what I think I need I will try the closest I have. I think that has always worked. It is not the kind of thing where a tenth of a millimeter matters in my experience. I'm sure sometimes it matters but it doesn't always. If you have an O-ring that is a little small but thicker than you want it will stretch and may become exactly what you need.
 
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I'm trying to keep a stash of various sizes, I have too many airguns and ordering kits for each gun is practically impossible and very expensive. Each size, I would have at least 10 pieces stashed. If it drops down below 5 I put it "on the list" for the next batch order. If I don't have a size I need, I'd order 10 (plus whatever is on the list) and add it to my stash. This way I sort of keep rotating inventory and my costs are relatively low. But yeah, as @marflow 777 said - "if you think find Orings are PITA you are in the wrong hobby" :ROFLMAO:.
 
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