The Husqvarna 505686301 Countersunk External Tooth Lock Washer 5/16 is a genuine OEM fastening component designed for the Soff-Cut4200 early entry saw. As an authentic Husqvarna part, it is manufactured to the exact dimensions and material specifications required for proper installation and long-term clamping integrity. DHS Equipment supplies this part to help keep your equipment running with the correct hardware in every assembly. Cross-reference part number 505686301 against your parts diagram to confirm fitment before ordering.
Key Features
- Genuine OEM Material Grade — Hardened to Husqvarna's specification, this lock washer delivers the tooth engagement and seating depth required for a countersunk fastener application — not a compromise fit from a generic hardware assortment.
- External Tooth Design for Positive Lock — The serrated external teeth bite into the mating surface under torque load, resisting loosening caused by vibration — a critical quality in early entry saw assemblies subject to continuous cutting vibration.
- 5/16 Countersunk Profile — The countersunk geometry seats flush with or below the surface, allowing hardware to sit correctly without proud edges that could interfere with adjacent components or surface contact points.
- Direct Fitment for the Soff-Cut4200 — Engineered specifically for the Soff-Cut4200 early entry saw, this washer installs directly in place of the original without modification or re-drilling.
- Restored Fastener Integrity — A worn or missing lock washer allows fasteners to back out under load, leading to loose assemblies and potential misalignment. Replacing it with the correct OEM component restores the clamping system to its original holding strength.
A countersunk external tooth lock washer serves as a vibration-resistant fastening element within bolted assemblies on the Soff-Cut4200 early entry saw. The external teeth grip the mating surface as the fastener is torqued, creating mechanical resistance that prevents the bolt or screw from backing out during operation. When this component is missing, damaged, or substituted with an incorrect size, fasteners can work loose progressively under the high-frequency vibration generated during green-concrete cutting, compromising the integrity of the assembly it secures.
Part Details
| Part Number | 505686301 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Countersunk External Tooth Lock Washer 5/16 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Early Entry Saw | Soff-Cut4200 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
