This single O-Ring Boss Adapter fits 1 1/16 x 12 (-12) O-ring ports and has a male 6AN fitting on the other end. It will fit Canton oil and fuel filters as well as some brands of oil tanks. We normally sell this size and other sizes of -12 O-Ring Boss to AN Male Adapters in pairs, but this one is a single. A pair is shown in the photo.
We also offer AN920 Straight O-Ring Boss to AN Male Adapters (Part No. 3603) in a wider variety of size combinations, including equal size O-ring boss / AN male sizes.