Blue Anodized Aluminum Adapter (AN 815), -12 Male JIC 37 deg Flare To -12 Male JIC 37 deg Flare, Straight

It's got -12 male JIC 37-degree flare fittings on both ends, so as long as your components match that, you should be good to go.

Correct on both counts. Each end is a -12 male JIC 37-degree flare, so you're looking at a straight male-to-male adapter with identical fittings on either side. That configuration is built for joining two female JIC ports in a straight line without any offset or angle involved.