4 Pack Lawn Mower Blade Replaces OEM 21546095 138498 532138971 Compatible with 42 inch Deck Craft sman Pou Pro LT1000 LT2000 T110 YT3000 PP19A42 Husqv Arna YTH18542 Lawn Mower(5 Point Star)

What It Is

This is a 4-pack of replacement lawn mower blades designed for 42-inch cutting decks. They feature a 5-point star center hole and are intended for medium-duty residential mowing on Craftsman, Poulan Pro, Husqvarna, and similar tractors.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Your mower must have a 42-inch deck. Measure the blade length—these are 20.5 inches tip-to-tip.
• Center hole: The 5-point star pattern fits spindles with a 5-sided star drive. This is common on many Craftsman and Husqvarna models but not universal. If your mower uses a round or oval hole, these will not fit.
• OEM cross-references: Replaces OEM part numbers 21546095, 138498, and 532138971. Compatible with Craftsman LT1000, LT2000, T110, YT3000; Poulan Pro PP19A42; Husqvarna YTH18542. Check your mower’s model number against the seller’s list.

Key Things to Know

• Quality: Aftermarket steel, not OEM. Users report they are slightly thinner than factory blades but cut well for residential use. Expect to sharpen them mid-season.
• Installation: Straightforward—remove old blades, install new ones with the lift wings pointing up toward the deck. Use a torque wrench to tighten bolts to 70–90 ft-lbs.
• Common gotcha: The star hole may be a tight fit on some spindles. If it doesn’t slide on easily, lightly file the hole edges. Do not force it or you risk damaging the spindle.
• Balance: These are not pre-balanced. Check balance on a blade balancer before installing to avoid vibration and bearing wear.

Should You Buy It

Buy this if you own a 42-inch Craftsman or Husqvarna tractor with a star-drive spindle and want a budget-friendly 4-pack for regular blade changes. Skip it if you need OEM-grade thickness or have a round-hole spindle—look for a different blade pattern.