Oregon 48 Inch Lawn Mower Blades, Mower Blades for 48" Deck, 16-1/3" Length, Direct Replacement for Craftsman, Husqvarna, Poulan 173920, 173921, 512258301, 532173920, 532173921 and More (3 Pack)

What It Is

This is a 3-pack of 48-inch lawn mower blades designed to replace worn or damaged blades on 48" cutting decks. They are intended for residential or light commercial use on Craftsman, Husqvarna, and Poulan tractors, offering a direct replacement for OEM part numbers 173920, 173921, 512258301, 532173920, and 532173921.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Must be exactly 48 inches (not 42", 46", or 54").
• Blade length: Each blade is 16-1/3" long. Measure your current blade center hole to tip—if it’s 16-1/3", these fit.
• OEM cross-reference: These replace Craftsman 173920/173921, Husqvarna 532173920/532173921, and Poulan 512258301. If your model uses a different OEM number, double-check physical dimensions.
• Center hole: Typically 5/8" or 7/8" diameter. Measure yours; the listing doesn’t specify, so verify with a caliper.

Key Things to Know

• Quality: Oregon blades are known for good durability and sharpness out of the box, but they are not “premium” (no hardened steel edge or anti-scalp features). Expect reasonable lifespan for weekly mowing.
• Installation: Simple bolt-on replacement—no special tools beyond a socket wrench. Torque to manufacturer spec (usually 40–50 ft-lbs). Always lift the deck and disconnect the spark plug before working.
• Common gotcha: These are for 48" decks only. Some tractors with 48" decks use different blade lengths (e.g., 15" or 18"). Measure twice. Also, check if your deck uses a single long blade or two shorter ones—this 3-pack is for a 3-blade system.
• Balance: Store-bought Oregon blades are usually pre-balanced, but it’s wise to check with a blade balancer. An unbalanced blade can cause vibration and damage the spindle.

Should You Buy It

If you need a reliable, direct replacement for a 48" Craftsman, Husqvarna, or Poulan deck with 16-1/3" blades, this 3-pack is a solid value. It’s not the cheapest or the highest-end option, but it’s a safe, no-hassle choice for standard residential mowing. Skip it if you want premium mulching or high-lift blades—those are sold separately.