Multiquip 0040512000 Toothed Washer

The Multiquip 0040512000 is a genuine OEM Toothed Washer designed for the DCA Super-Silent, Ultra-Silent, and diesel-powered generator series. As a direct OEM replacement, this washer is manufactured to the same specification as the original component, ensuring it seats, torques, and retains exactly as intended across the wide range of compatible DCA generator models. Confirmed fitment spans the DCA45, DCA70, DCA85, DCA100, DCA125, DCA150, DCA180, DCA250, DCA300, DCA400, and DCA600 series, among others. Ordering by part number 0040512000 guarantees you receive the correct washer for your specific generator.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original material and dimensional specification, so the locking teeth deliver the same grip and vibration resistance as the part it replaces.
• Broad DCA Generator Compatibility — Fits a wide range of DCA Super-Silent, Ultra-Silent, and diesel generator models including the DCA45, DCA70, DCA125, DCA150, DCA300, DCA400, and DCA600 series.
• Drop-In Installation — Matches the original bore diameter and outer profile, seating correctly against mating fasteners without rework or shimming.
• Vibration-Locking Tooth Profile — The serrated edge bites into the mating surface under torque, preventing fastener back-off caused by generator vibration during continuous operation.
• Electrical Grounding Integrity — In electrical assemblies, toothed washers pierce surface coatings to maintain a low-resistance ground path — a function that plain washers cannot replicate.

A toothed washer — also called a star or serrated lock washer — is a fastening component whose serrated or toothed outer or inner edge bites into the mating surfaces when a fastener is tightened. This mechanical locking action resists loosening caused by vibration, thermal cycling, and dynamic loads, all of which are present in continuously running generator sets. In electrical applications, the teeth also cut through anodized or painted surfaces to create a reliable metal-to-metal contact point, preserving grounding and bonding continuity. A missing, damaged, or substituted plain washer in these positions can lead to fastener loosening, structural joint movement, or compromised ground connections over time.

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.