Husqvarna Washer OEM #505173001

Keep your Husqvarna outdoor power equipment properly assembled and operating safely with the genuine OEM Washer (Part #505173001). This factory-original precision washer is a critical fastening and load-distribution component — placed under a bolt head, nut, or between mating surfaces to distribute clamping force evenly, prevent fastener pull-through, reduce surface damage, and maintain the correct dimensional relationship between assembled parts.

The sequential relationship between this part (#505173001) and the Spacer Sleeve (#505173301) strongly suggests these two components work together as a matched washer-and-sleeve pair within the same assembly — a common pairing in Husqvarna handheld equipment where precise component spacing and clamping geometry are both required.

Also Known As:

• Flat Washer / Plain Washer / Precision Washer
• Thrust Washer / Seating Washer
• Hardware Washer / Assembly Washer

Key Features:

• Genuine OEM Part – Manufactured by Husqvarna to exact factory specifications for correct inner diameter, outer diameter, and thickness — the three dimensions that determine whether a washer functions correctly in its intended application
• Precision Load Distribution – Designed to fit Husqvarna’s outdoor power tools perfectly, distributing fastener clamping force evenly across the mating surface to prevent damage, deformation, or pull-through
• Protects Mating Surfaces – Creates a hardened, dimensionally stable bearing surface between the fastener and the softer housing or component material, reducing wear and extending assembly life
• Vibration and Loosening Resistance – Maintains consistent clamping preload in high-vibration handheld equipment environments where standard hardware-store washers can deform or compress over time
• Manufactured to Husqvarna’s strict standards for compatibility and durability
• Likely Companion to Spacer Sleeve #505173301 – Sequential part numbering indicates these components are designed to work together; inspect and replace both when servicing the assembly
• Sold Individually – Order the exact quantity needed for your repair

Why Genuine OEM Washers Matter: A washer that appears visually similar but differs in inner diameter, outer diameter, or thickness can result in insufficient clamping force, fastener movement, housing damage from oversized bearing surfaces, or interference with adjacent components. Some spacers and washers are unique to the parts they are fastened to — we always suggest purchasing from a genuine OEM original parts dealer to ensure they fit exactly as intended for safe operation. Husqvarna’s OEM washer is machined to the precise tolerances required by the original design, ensuring consistent, safe assembly performance throughout the equipment’s working life.

Part Details:

• OEM Part Number: 505173001
• Also Listed As: 5051730-01
• Part Type: Washer / Flat Washer / Precision Washer
• Related Part: Spacer Sleeve #505173301 (likely companion component)
• Brand: Husqvarna (Genuine OEM)
• Application: Husqvarna outdoor power equipment (chainsaws, trimmers, brushcutters, and related equipment)