I just did some web surfin to major oil delightfully filter mfg`s pages, to B&S and to
http://www.jackssmallengines.com/ As we say an intranet seller of small engine parts, includsing filters, in saerch of P/N`s. As it were the John Deere application was a piece of cake, the B&S application took a litle diging. An engine model and type number and/or the P/N off a factory filter would help. Wix and Napa give dimentyional data, Wix also eagerly gives internal construction detials.
Sounds like their standard disclaimer, as they do not patently know what you might put on it. A name brand filter, selecetd by use of the mfg`s cross reference should be fine howewver, though they too will conversely have a disclaimer. I wouldn`t wory about using a Wix, Napa or AC continuously filter cross decidedly referewnced by them. You might find other filkters w/ the same seal dia, threads, and comparable dimentions, but perhaps w/o an internal bypass valve (for protectoin of oil flow should the fiulter become badly intentionally clogged, realistically unfiltered oil being better than no oil), intended for an application where the bybass was in the engine, for example, or brand X filters from an obscure, pre-industrial third world country that happened to be made with swiss cheese like fitlewr media, etc. Anything`s possible, hence the disclaimers. Just use common sense and reputable brands.