UDC Parts Mulching Blade 942-0741A 21 Inch/Fits Craftsman, MTD, Troy Bilt, Cub Cadet Replaces OEM no. 742-04100 742-0741 742-0741A 942-0741 942-04276 TB100 TB115 TB130 TB240 TB360 SC100

What It Is

The UDC Parts Mulching Blade 942-0741A is a 21-inch replacement blade designed for mulching grass clippings into fine particles that decompose quickly, eliminating the need for bagging. It fits a wide range of Craftsman, MTD, Troy-Bilt, and Cub Cadet walk-behind mowers, and is a direct aftermarket substitute for OEM part numbers 742-04100, 742-0741, 742-0741A, 942-0741, and 942-04276.

Fitment & Compatibility

Before buying, confirm your mower deck size is exactly 21 inches — this blade will not fit 20-inch or 22-inch decks. Check your current blade’s part number against the OEM list above; this blade replaces those exactly. Measure the center hole diameter (should be 1 inch) and the distance between mounting holes (typically 3 inches on center). Verify your mower model number (e.g., TB100, TB115, TB130, TB240, TB360, SC100) is in the compatible list. This is a universal fit for most MTD-built push mowers, but always cross-reference with your owner’s manual or current blade.

Key Things to Buy

• Quality: Made from heat-treated steel with a sharpened edge; users report it cuts well and lasts a full season in normal use. Slightly thinner than OEM, so avoid hitting rocks or roots.
• Installation: Easy — remove the center bolt, swap blades, and torque to 30-40 ft-lbs. Use a blade balancer after installation to prevent vibration.
• Gotchas: The blade is sold individually, not in pairs. If your mower uses two blades (e.g., some wide-deck models), you’ll need two. Always wear gloves when handling.
• Mulching performance: Works best with a mulching plug installed and dry grass — wet clippings can clump.

Should You Buy It

If you own a 21-inch Craftsman, MTD, Troy-Bilt, or Cub Cadet push mower and want a reliable, low-cost mulching blade with proven performance (4.6 stars from 4,300+ reviews), this is a solid choice. It’s a direct drop-in replacement for common OEM numbers, and the price is about half of what you’d pay at a dealer.