2PK USA Mower Blades for 42" John Deere X300 M145969 M154061 AM137327 M154062

What It Is

This is a 2-pack of USA-made replacement mower blades for 42-inch John Deere X300 series lawn tractors. They’re designed for mulching, bagging, or side-discharge cutting on residential turf.

Fitment & Compatibility

Before buying, confirm your deck is 42 inches and your mower is a John Deere X300, X304, X320, X324, X340, X360, or X380. These blades replace OEM part numbers M145969, M154061, AM137327, and M154062. Measure your existing blade length (21 inches), width (2.25 inches), center hole diameter (0.75 inches), and offset (0.75 inches). The blade thickness is 0.20 inches. They do not fit 48-inch or 54-inch decks.

Key Things to Know

• Quality: USA-made steel with a hardened edge; holds sharpness longer than cheap imports.
• Installation: Requires a 15/16-inch socket and torque wrench (set to 70-90 ft-lbs). Use thread locker on the bolts.
• Gotcha: These blades are sold as a pair, but your deck uses two blades. If you have a 3-blade 42-inch deck, you need two packs.
• Gotcha: Check your spindle assembly for wear before installing—bent spindles will cause uneven cut and blade damage.

Should You Buy It

If you own a 42-inch John Deere X300 series mower and want a direct-fit, durable blade that won’t break the bank, this is a solid choice. The USA-made steel and positive reviews (4.4/5) make it a reliable upgrade over generic imports. Avoid it if you need a 3-blade set or have a different deck size.