Mulch Plate Cover Plug - Precision Fit for 42" & 46" Cub Cadet Decks, Compatible with #631-05195A, Reinforced Steel Mulching Kit

What It Is

This mulch plate cover plug (OEM #631-05195A) is a replacement part for the reinforced steel mulching kit on 42-inch and 46-inch Cub Cadet lawn tractor decks. It seals the side-discharge opening so grass clippings recirculate under the deck for finer mulching.

Fitment & Compatibility

Before buying, check three things:

• Deck size: Fits only 42-inch (e.g., 42A, 42B) and 46-inch (e.g., 46A, 46B) Cub Cadet fabricated decks. Not for 50-inch or 54-inch decks.
• Model series: Works with LT, XT1, XT2, XT3, and some RZT zero-turn models that use the reinforced steel mulching kit. Confirm your deck’s part number in the manual or under the deck.
• OEM vs aftermarket: This is a genuine Cub Cadet part—identical to the original. Aftermarket plugs may fit but often warp or crack faster. Measure the rectangular opening (roughly 6 x 3 inches) and compare to the plug’s dimensions if unsure.

Key Things to Know

• Quality: Reinforced steel is durable, but the rubber seal around the edge can degrade after 2-3 seasons in sun exposure. Inspect it before installing.
• Installation: Simple—no tools needed. Just slide the plug into the discharge chute until it clicks or locks. If it’s loose, the latch may be broken or the deck opening is distorted.
• Common gotcha: This plug is for the mulching kit only—it does not include the baffle or cover plate. If you’re missing those, you need the full kit (includes this plug).
• Rating context: The 3.4-star average reflects a small sample (4 reviews). Most complaints are about fit on non-Cub decks or missing hardware—not the plug itself.

Should You Buy It

Buy this if you have a 42" or 46" Cub Cadet deck with the reinforced steel mulching kit and need a direct OEM replacement. Skip it if your deck is a different size, you’re missing the full kit, or you want a cheaper aftermarket option—but expect lower durability.