MTD 742-04308-X684 21.23" Xtreme 2-in-1 Mower Blade – Replacement Blade for 42" Riding Mower Decks

Part Number: 742-04308-X684
Category: MTD Lawn & Garden Equipment Replacement Parts
Type: Replacement 21.23" Xtreme 2-in-1 Mower Cutting Blade

The MTD 742-04308-X684 Xtreme Mower Blade is a genuine OEM replacement cutting blade designed for compatible riding lawn mowers and zero-turn mowers equipped with 42-inch cutting decks. Measuring 21.23 inches long, this blade features a star-shaped center mounting hole and an Xtreme 2-in-1 cutting design that supports effective side discharge and bagging of grass clippings. Designed for select MTD, Cub Cadet, Troy-Bilt, Craftsman, and other compatible lawn mowers, the 742-04308-X684 provides a replacement for worn, dull, bent, or damaged cutting blades.

Product Specifications

• Part Number: 742-04308-X684

• Brand: MTD

• Product Type: Lawn Mower Cutting Blade

• Component Type: Replacement Mower Deck Blade

• Part Classification: Genuine OEM Replacement Part

• Blade Series: Xtreme

• Blade Design: 2-in-1

• Blade Length: 21.23"

• Center Hole Pattern: Star

• Compatible Cutting Deck Size: 42"

• Blades Required per Deck: 2

• Cutting Functions: Side Discharge & Bagging

• Compatible Equipment: Select Riding Lawn Mowers & Zero-Turn Mowers

• Compatible Brands: MTD, Cub Cadet, Troy-Bilt, Craftsman, Yard Machines & Huskee

• Replaces Part Numbers: 742-04126-X, 742-04308-X, 742-04360, 742-04410, 742-0616-X, 742-0616A-X, 942-04126-X, 942-04308-X, 942-04312-X, 942-04360, 942-04360-0684, 942-04410, 942-04410-0684, 942-0616-X & 942-0616A-X

• Application: Lawn Mower Cutting Deck Maintenance

• Quantity: 1 Mower Blade

• Condition: New

Features & Benefits

• Genuine MTD 742-04308-X684 replacement Xtreme mower blade

• Features a 21.23-inch blade length

• Designed for compatible 42-inch cutting decks

• Xtreme 2-in-1 design supports side discharge and bagging

• Star-shaped center hole fits compatible mower blade spindles

• Helps maintain consistent grass cutting performance

• Supports proper airflow and grass clipping discharge

• OEM replacement design provides dependable fit in specified applications

• Suitable for replacing worn, dull, bent, or damaged mower blades

Applications

• Select MTD riding lawn mowers with 42-inch decks

• Compatible Cub Cadet lawn tractors

• Select Troy-Bilt riding lawn mowers

• Compatible Craftsman lawn tractors

• Select Yard Machines riding lawn mowers

• Compatible Huskee LT 4200 lawn tractors

• Select Craftsman Z6000 zero-turn mower configurations

• Compatible 42-inch RZT mower decks

• Riding mower cutting blade replacement

• Equipment specifying MTD 742-04308-X684 mower blades

Important Information

• Verify MTD part number 742-04308-X684 before ordering.

• This listing includes one replacement mower blade, not a complete two-blade set.

• Compatible 42-inch mower decks typically require two blades for a complete replacement.

• The individual blade measures 21.23 inches long.

• Features a star-shaped center mounting hole.

• Classified by MTD as an Xtreme 2-in-1 blade for side discharge and bagging.

• Replaces several earlier MTD Xtreme mower blade part numbers.

• Confirm compatibility using your mower model number, deck configuration, and illustrated parts diagram.

• Not every MTD, Cub Cadet, Troy-Bilt, or Craftsman mower uses the same cutting blade.

• Verify the original blade dimensions and mounting pattern before purchasing.

• Inspect the blade spindle, mounting bolt, and cutting deck for wear or damage before installation.

• Replace blades that are cracked, bent, excessively worn, or improperly balanced.

• Shut off the engine, remove the ignition key, and disconnect the spark plug or isolate the battery before servicing.

• Follow the mower manufacturer's blade installation, tightening torque, and safety instructions.