Multiquip 0040510000 Toothed Washer

The Multiquip 0040510000 Toothed Washer is a genuine OEM component designed for the DCA Ultra-Silent and Super-Silent diesel generator series, including widely deployed models such as the DCA25USI, DCA45SSIU, DCA125SSJU, DCA150SSJU, DCA220SSJU, and DCA300SSJU, among many others across the DCA product line. Sourced directly from Multiquip, this toothed washer matches the original specification for a direct, tool-compatible installation with no guesswork. Whether you are servicing a single unit or maintaining a fleet of DCA generators, using the correct OEM hardware ensures the fastened joint performs as the manufacturer intended. DHS Equipment stocks this part and stands behind its authenticity as an authorized Multiquip parts source.

Key Features

• Genuine OEM Hardware Grade — Manufactured to Multiquip's original specification, ensuring the tooth profile delivers the locking force and surface contact the joint was engineered for.
• Direct Installation Fit — Matches the original bore diameter and outer profile of the DCA generator application, seating correctly against mating hardware without rework.
• Broad DCA Series Coverage — Compatible across an extensive range of DCA Ultra-Silent and Super-Silent generators, from the DCA20SPX through the DCA1100SSC and NGA150 series.
• Locking Integrity Under Load — The serrated tooth pattern bites into mating surfaces to resist loosening from vibration — critical on generator sets that run under sustained load cycles.
• Correct Torque Retention — A worn or substituted washer can allow fastener creep over time; using part this part maintains the clamping force the assembly requires to stay secure.

A toothed washer — also called a serrated or star washer — is a hardened fastener component placed beneath a bolt head or nut to prevent loosening caused by vibration. The serrated teeth bite into both the fastener face and the mating surface when the fastener is torqued, creating a mechanical lock that a standard flat washer cannot provide. On diesel generator sets like the DCA series, where sustained engine vibration is a constant operating condition, a failed or missing toothed washer can allow critical fasteners to back out over time, leading to loose connections, component movement, or electrical bonding failures. Replacing a worn or damaged washer with the correct OEM part restores the designed clamping and locking performance of the joint.

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.