Set of 2, Longer Life 596-370 Gator Fusion G5 3-In-1 Mulching Blades to Replace 405380, 532405380, 403107, 532403107: Craftsman, Poulan, Husqvarna, Made in USA

What It Is

This is a set of two Gator G5 mulching blades (model 596-370) designed for 42-inch cutting decks on Craftsman, Poulan, and Husqvarna lawn tractors. They replace OEM part numbers 405380, 532405380, 403107, and 532403107, and are optimized for 3-in-1 mulching, bagging, and side discharge.

Fitment & Compatibility

• Deck size: Only fit 42-inch decks—measure your deck width before buying.
• Blade measurements: 20.5 inches long, 0.25-inch center hole, 1-inch center star shape (fits most standard spindle mounts).
• OEM cross-reference: Direct replacements for Craftsman/Poulan/Husqvarna OEM part numbers listed above. Not compatible with MTD, John Deere, or Toro decks without adapter.
• Check your model number: Confirm your mower’s model number is on the compatibility list (common on Craftsman 917 series, Poulan Pro, Husqvarna YTH models). If your deck uses a different spindle pattern, these won’t bolt on.

Key Things to Know

• Longer life claim: G5 blades are made from thicker, heat-treated steel (up to 0.1875 inch) versus standard OEM blades, reducing warping and sharpening frequency.
• Installation difficulty: Easy for DIY—requires a socket wrench and torque to 70-90 ft-lbs. No special tools needed, but use a blade removal tool to hold the blade.
• Balance and vibration: Pre-balanced from factory, but always check balance on a balancer after install. Out-of-balance blades cause vibration and spindle wear.
• Mulching performance: The “Gator” serrated edge and wing tips improve fine clipping breakdown, but work best at higher engine speeds and with dry grass.

Should You Buy It

Buy these if you have a 42-inch Craftsman, Poulan, or Husqvarna tractor and want a durable, USA-made blade that lasts longer than OEM without breaking the bank. They’re ideal for heavy mulching users who want less frequent blade swaps. Skip if your deck is non-standard size or you need a universal blade for multiple brands.