Multiquip 0040520000 Toothed Washer

The Multiquip 0040520000 Toothed Washer is a genuine OEM component designed for the DCA series ultra-silent and super-silent diesel generators, including models DCA125USJ, DCA220SSJ, DCA220SSJU, DCA70USI, DCA60SSI2, DCA-70SSJU3. As a direct OEM replacement, this washer is produced to the same specification as the original hardware installed at the factory. Sourced directly through authorized Multiquip supply channels, it ensures an exact match for any DCA series unit requiring service or hardware replacement. DHS Equipment stocks this part and carries it ready for the demanding schedules of contractors and generator service technicians.

Key Features

• Genuine OEM Hardware Spec — Manufactured to the same dimensional and material tolerances as the original installed component, ensuring correct clamping force and retention when torqued.
• Secure Fastener Engagement — The toothed profile bites into mating surfaces under load, resisting loosening caused by vibration — a critical quality in generator applications subject to continuous engine movement.
• Broad DCA Series Coverage — Fits a wide range of Multiquip DCA ultra-silent and super-silent generator models, including DCA125USJ, DCA220SSJ, DCA220SSJU, DCA70USI, DCA60SSI2, DCA85USJ, DCA85USJ2, DCA150USJ, DCA180SSJU, DCA25SSI, DCA40SSI, DCA45USI, and additional DCA variants.
• Drop-In Service Replacement — Matches the original fastener position and stack height, so it installs directly without any modification to surrounding hardware or fastener assemblies.
• Electrical Safety Compliance — In generator assemblies, toothed washers are commonly used to establish reliable grounding contact between components; using the correct OEM washer maintains the integrity of those electrical bonding points.

A toothed washer — also called a star washer or serrated washer — is a hardened fastener component used beneath a bolt head or nut to prevent loosening under vibration and dynamic load. The serrated teeth deform slightly when the fastener is tightened, locking the assembly in place and distributing clamping load across the contact surface. In generator equipment, these washers are especially important in electrical grounding connections and panel assemblies, where a loose or missing washer can compromise both mechanical integrity and electrical continuity. A worn or omitted toothed washer can allow fasteners to back out over time, leading to component movement, arcing, or grounding faults that affect generator output and safety.

Part Details

Compatibility & Fitment

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.