Original MTD adapter 45031-AF (listed as AF-45031) — a direct replacement adapter that joins a 1/2" NPT pipe thread to a flexible spray/hose connection. It’s the exact MTD part used where a tapered 1/2" NPT inlet needs to be routed to the hose on sprayer and accessory plumbing.

Threading and size details: the adapter mates to a standard 1/2" NPT tapered thread (major diameter ≈ 21.3 mm, 14 TPI) and provides a hose outlet sized to accept the machine’s spray hose. If you need the correct fit for a threaded inlet, this is the part built to the same thread standard as common garden fittings.

Typical fitment: this adapter is listed in MTD parts lists for sprayer/accessory assemblies and is commonly used on MTD sprayer models such as 45-02931 and 45-02933 (and related sprayer assemblies where AF-45031 / 45031 is shown in the parts diagram). It’s the part you’d reach for when a hose or inlet connection has cracked or leaked and you want an original MTD replacement to restore the seal and routing.

Sold individually as original MTD replacement AF-45031 (45031‑AF), this small adapter is straightforward to swap in with basic hand tools and thread sealant as required — a simple way to get a sprayer or accessory back in service using genuine MTD spare parts.