(3 Pack) Spindle Blade Nut for Cub Cadet Zero Turn Mower RZT 50 - RZT 54 - RZT42，Spindle Nut Fit for MTD Craftsman Troy Bilt Mower Replaces 912-0417A，712-0417A

What It Is

This is a 3-pack of replacement spindle blade nuts designed for Cub Cadet zero turn mowers and compatible MTD, Craftsman, and Troy-Bilt models. It secures the mower blade to the spindle assembly, preventing blade loosening during operation.

Fitment & Compatibility

• Direct fit for: Cub Cadet RZT 42, RZT 50, and RZT 54 zero turn mowers.
• Also fits: Select MTD, Craftsman, and Troy-Bilt mowers with the same spindle design.
• OEM cross-reference: Replaces Cub Cadet/MTD part numbers 912-0417A and 712-0417A.
• What to check before buying: Confirm your spindle shaft thread size (typically 5/8”-18 or 3/4”-16 on these models). Measure your existing nut’s hex size (usually 15/16” or 1-1/16”). Verify your deck model number (e.g., 50A-401-100) if unsure—some older RZT decks use a different nut. Not for standard walk-behind mowers.

Key Things to Know

• Quality: These are OEM-style stamped steel nuts with a nylon locking insert. They hold well but can strip if over-torqued—use a torque wrench (40-50 ft-lbs recommended).
• Installation: Easy swap with a socket and ratchet. No special tools required. Replace all three at once to ensure even wear and consistent blade retention.
• Common gotcha: The nylon insert can wear out after multiple removals. If the nut spins freely by hand, replace it immediately. Do not reuse old nuts—this is a safety-critical fastener.
• Pack size: 3 nuts per pack, enough for one full deck replacement (3 spindles). No extra for spares.

Should You Buy It

Yes, if you own a Cub Cadet RZT 42/50/54 or a compatible MTD/Craftsman/Troy-Bilt zero turn and need a reliable, direct-fit replacement. At $8.85 for three, it’s cheaper than buying OEM singles and avoids the headache of mismatched hardware. Ideal for routine blade changes or spindle rebuilds. Skip if your deck uses a different thread size or you need a bolt-style fastener.