Husqvarna Hardened Washer 3/4″ OEM #574824701

Maintain the integrity of critical blade and spindle fastener assemblies on your Husqvarna lawn equipment with this Genuine OEM Hardened Washer (Part #574824701). Precision-manufactured to exact Husqvarna factory specifications, this authentic 3/4″ hardened washer delivers the correct load distribution, clamping surface, and material hardness required for safe, secure blade bolt and spindle hardware assemblies on compatible Husqvarna mowers and outdoor power equipment.

Why Hardened Washers Are Critical:
Not all washers are created equal. Standard washers compress, deform, and lose clamping effectiveness under the extreme torque, vibration, and rotational stress present in lawn mower blade and spindle assemblies. A hardened washer is specifically heat-treated to resist deformation under high-torque fastener loads — maintaining consistent clamping force, preventing fastener loosening, and protecting the mating surfaces of the blade bolt, spindle shaft, and blade adapter from damage. Using an incorrect, undersized, or non-hardened washer in these applications is a safety hazard that can result in blade loosening during operation. Always replace with the correct genuine OEM hardened washer.

Signs Your Hardened Washer Needs Replacement:

• Visible warping, deformation, or compression of the washer face
• Corrosion, cracking, or pitting on the washer surface
• Blade bolt torque specification cannot be achieved or maintained
• Washer is missing from the blade bolt or spindle assembly
• Routine blade sharpening or replacement service — inspect and replace washers as needed

Key Features:

• Genuine Husqvarna OEM part — not aftermarket or generic
• 3/4″ hardened washer — heat-treated for superior resistance to deformation under high-torque blade bolt loads
• Maintains correct clamping force and load distribution in blade and spindle fastener assemblies
• Protects mating surfaces of blade bolts, spindle shafts, and blade adapters from wear and damage
• Manufactured to exact Husqvarna material and dimensional specifications
• Direct OEM replacement — installs to factory fit without modification

Compatibility:
This hardened washer fits select Husqvarna lawn mower and outdoor power equipment models. Always confirm fitment using your Husqvarna model and serial number — typically found on a label under the seat, on the frame, or on the deck housing — and cross-reference against your unit’s Illustrated Parts List (IPL) before ordering to verify the correct washer size and specification for your specific assembly point.

Installation Note:
Always torque blade bolts to Husqvarna’s factory-specified torque value after installing the hardened washer. Refer to your equipment’s operator’s manual or service manual for the correct blade bolt torque specification for your model. Inspect the hardened washer at every blade removal or sharpening service and replace if any deformation or damage is evident.

Part Details:

• Part Number: 574824701
• OEM Brand: Husqvarna
• Part Type: Hardened Washer
• Size: 3/4″
• Material: Hardened Steel
• Condition: New / Genuine OEM