Lawn Mower Blades for 21 inch Cut Replacement Part Number Craftsman Husqvarna Poulan 165833 175064 176135 189028 33275 33524 406712 532406712 594893001 331737B 917175064,2 Pack

What It Is

This is a 2-pack of replacement lawn mower blades designed for 21-inch cutting decks, compatible with Craftsman, Husqvarna, and Poulan mowers. They are intended for standard residential mowing on grass and light turf.

Fitment & Compatibility

Before buying, verify three things: deck size must be exactly 21 inches (measure from blade tip to blade tip on your current blade). OEM cross-reference numbers include Craftsman 165833, 175064, 176135, 189028, 33275, 33524, 406712, 532406712, 594893001, 331737B, and 917175064—if your model uses any of these, these blades fit. Physical check: measure your existing blade’s length (21”), center hole diameter (typically 1” or 7/8”), and thickness (usually 0.125”–0.140”). These are aftermarket replacements, not genuine OEM, so confirm your mower brand and model number against the list above. Avoid assuming fit based on brand alone—some 21-inch decks use offset or different hole patterns.

Key Things to Know

• Quality: Aftermarket steel, likely pre-balanced and sharpened. Expect slightly shorter lifespan than OEM, but adequate for typical home use. Check for burrs on the cutting edge and balance before installing (use a blade balancer or nail-in-wall test).
• Installation difficulty: Easy—remove spark plug, tip mower, unbolt old blade (left-hand thread on some models), replace with new blade (sharp edge facing up toward deck). Torque bolt to 30–50 ft-lbs.
• Common gotchas: Verify blade orientation—the sail (lift) should point up toward deck. If your mower uses a “star” or “oval” center hole instead of round, these won’t fit. Also check if your deck requires a specific blade offset (flat vs. curved) for proper grass discharge.
• Pack size: 2-pack is cost-effective if you need spares or have two compatible mowers, but single-blade mowers only need one.

Should You Buy It

Buy this if you have a 21-inch Craftsman, Husqvarna, or Poulan mower that matches the listed OEM numbers, and you want an affordable, ready-to-install aftermarket blade set for regular lawn care. Skip it if you need a premium, longer-life blade (e.g., for heavy mulching or rough terrain), or if your mower uses a non-standard hole pattern.