Caltric Blade Bolts with Castle Nut Kit Compatible with King Kutter Rotary Cutter L40 L48 L60 L72 P48 P60 P72 501001

What It Is

This Caltric Blade Bolts with Castle Nut Kit is a replacement fastening set for King Kutter rotary cutters, securing the blade to the spindle. It’s designed for medium-to-heavy-duty mowing decks, including models L40, L48, L60, L72, P48, P60, and P72.

Fitment & Compatibility

Before buying, verify your King Kutter model number (e.g., L60, P72) and deck size. This kit replaces OEM part 501001. Check that your blade spindle uses a castle nut and cotter pin setup (not a lock nut). Measure the bolt diameter (typically 5/8") and length (usually 2-3/4") to confirm—these bolts are standard for these models, but older or modified decks may differ. Aftermarket fit is exact for most King Kutter rotary cutters from the 2000s onward.

Key Things to Know

• Quality: Caltric bolts are heat-treated and grade 8 equivalent, matching OEM strength. Castle nuts and cotter pins are included.
• Installation: Easy—use a wrench and torque to 90-100 ft-lbs. No special tools needed, but a torque wrench is recommended to prevent blade loosening.
• Gotcha: The kit includes four bolts and nuts, but some models may need only two. Check your deck’s blade count before ordering.
• Safety: Always replace cotter pins with new ones—never reuse old pins, as they can fatigue and fail.

Should You Buy It

If you own a King Kutter L-series or P-series rotary cutter and need a reliable, affordable blade bolt replacement, this kit is a solid choice. It’s cheaper than OEM, meets grade 8 specs, and fits most standard models. Skip it if you have a different brand or a non-castle nut spindle.