A straight AN8 to M20 x 1.5 adapter. M20 x 1.5 is a genuinely large metric port and is typically encountered on oil filter housings and cooler take-off plates, gearbox and differential drain and fill points, and larger hydraulic and pressure-sender bosses. This adapter lets you convert that oversized metric port down to a workable AN8 hose run, which is usually what you actually want – a hose you can route and clamp sensibly rather than a heavy large-bore line. The AN8 end seals dry on its 37-degree flare cone with no sealant required. The M20 x 1.5 end is a parallel metric thread sealing at the seat or port face rather than on the threads, so tape and pipe dope are unnecessary and can foul the seal. Confirm your port pitch before ordering.