942-05056A Mower Blades with 712-0417A Hex Flange Nuts for Cub Cadet Ultima ZT1 54, ZT2 54, RZT L54, RZT S54 Zero Turn Mowers Replaces 942-05056A Cub Cadet 54 inch Mower Blades 742-05056A

What It Is

This is a set of three 54-inch mower blades plus three hex flange nuts (part 712-0417A) designed for Cub Cadet Ultima ZT1 54, ZT2 54, RZT L54, and RZT S54 zero-turn mowers. It replaces OEM part numbers 942-05056A and 742-05056A for standard cutting and mulching on residential/commercial turf.

Fitment & Compatibility

• Deck size: Only for 54-inch cutting decks. Do not use on 50-inch or 60-inch decks.
• Model fit: Cub Cadet Ultima ZT1 54, ZT2 54, RZT L54, RZT S54. Also compatible with some Craftsman and Troy-Bilt 54-inch zero-turns using the same spindle pattern.
• OEM vs aftermarket: This is a genuine Cub Cadet set, not an aftermarket knockoff. Direct bolt-on replacement for 942-05056A and 742-05056A.
• Measurements: Check blade length (approx. 18.5 inches), center hole diameter (5/8 inch), and thickness (0.25 inch). Nuts are 5/16-24 thread hex flange.
• Before buying: Confirm your deck spindle uses three blades (not two) and that your existing blade part number matches one of the OEM numbers listed.

Key Things to Know

• Quality: OEM-grade steel with heat-treated edge. Holds sharpness better than budget brands but will still need annual replacement if mowing frequently.
• Installation: Moderate difficulty – requires a socket wrench and possibly a blade removal tool. Torque nuts to 70-90 ft-lbs. Do not overtighten.
• Gotcha: The included hex flange nuts are self-locking; do not reuse old nuts. Always replace nuts when swapping blades.
• Balance: Blades come balanced from factory. If you sharpen, re-balance to avoid vibration and spindle wear.

Should You Buy It

Buy this if you own a Cub Cadet 54-inch zero-turn (Ultima or RZT series) and want a direct OEM replacement with correct fit, balanced blades, and included hardware. Skip if you have a different deck size or brand – measure first. At $28.99 with a 4.8 rating, it’s a solid value for a genuine part that avoids fitment headaches.