UDC Parts M170642 UC22008 Mulching Blades for John Deere 42 Inch X330 X350 X354 X370 Z335E Z345M, 2 Pack

UDC Parts M170642 Mulching Blades are a direct bolt-on replacement for the John Deere 42 inch deck on X-Series riding mowers and Z-Trak zero-turn mowers. Mulching design chops grass clippings into fine particles that decompose and return nutrients to your lawn. No modifications required — remove old blades, install new ones, and mow. Important: This blade features a Circle center hole (13/16 inch diameter). Please confirm your mower deck uses a Circle center hole spindle pattern before ordering. Replaces OEM Part Numbers: M170642, UC22008, M170639, GY20683 Compatible Models — John Deere 42 Inch: X-Series Riding Mowers: X330, X350, X354, X370, X380 S-Series Riding Mowers: S220, S240 Z-Trak Zero-Turn Mowers: Z315E, Z320M, Z320R, Z335E, Z335M, Z345M, Z345R Blade Dimensions: Length 21-3/8 inch, Width 2-3/4 inch, Thickness 0.160 inch, Center Hole Circle 13/16 inch, Air Lift 1-19/64 inch, Cutting Edge Length 4-9/64 inch. Compatible Deck Size: 42 inch only. Blade length is measured diagonally from one end to the other. Important: Parts may differ between different configurations of the same mower model. Please confirm your complete model number and deck serial number before ordering to ensure a proper fit. This blade is NOT compatible with GY20850 or GX22151 deck configurations. Installation: Direct bolt-on fit using existing hardware. Remove old blades, align Circle center hole with spindle, secure with existing bolt, and mow. Place the curved side facing the mower deck when installing.

• Replaces John Deere OEM Part Numbers M170642, UC22008, M170639, GY20683. Package includes 2 blades — complete set for full 42 inch deck coverage.
• Blade Dimensions: Length 21-3/8 inch, Width 2-3/4 inch, Thickness 0.160 inch, Center Hole Circle 13/16 inch, Air Lift 1-19/64 inch, Cutting Edge Length 4-9/64 inch. Compatible with 42 inch deck only. Important: Circle center hole spindle required — confirm your hole pattern before ordering.
• Compatible with John Deere 42 inch: X-Series X330, X350, X354, X370, X380 — S-Series S220, S240 — Z-Trak Zero-Turn Z315E, Z320M, Z320R, Z335E, Z335M, Z345M, Z345R. 42 inch deck configurations only. NOT compatible with GY20850 or GX22151 deck configurations.
• Mulching blade design chops grass clippings into fine particles that decompose quickly and return nutrients to your lawn. Reduces bagging and produces a clean, even cut on John Deere 42 inch X-Series and Z-Trak decks.
• Direct bolt-on installation using existing hardware — no modifications, no adapters, no special tools required. Remove old blade, align Circle center hole with spindle, place curved side facing deck, secure with existing bolt, and mow.