Brand: Canton Racing Products
These O-ring boss adapters all fit 1 1/16 x 12 (12AN) O-ring ports. They will fit Canton oil and fuel filters as well as some brands of oil tanks. Sold in pairs, complete with O-rings.
We also offer AN920 Straight O-Ring Boss Adapters (Part No. 3603) in a wider variety of size combinations, including equal size O-ring boss / AN male sizes.