Multiquip 0040018000 Lock Washer

The Multiquip 0040018000 Lock Washer is a genuine OEM component designed for Multiquip DCA-series ultra-silent and super-silent diesel generators. As a factory-sourced part, it meets the exact specifications Multiquip requires for proper fastener retention across a wide range of generator models. Confirmed fitment includes the DCA220SSK, DCA300SSC, DCA300SSK series, DCA250SSI, DCA400SSK, DCA500SSK, DCA600SSK, DCA800SSK, MQP240, and related variants. When you order 0040018000, you are getting the same lock washer installed during original assembly — no substitutions, no guesswork.

Key Features

• Genuine OEM Retention Spec — Manufactured to Multiquip's original torque-retention specifications, ensuring the washer delivers consistent spring tension and bite under load.
• Drop-In Installation — Matches the original fastener diameter and seating profile exactly, slotting into place the same way the factory-installed washer does.
• Broad DCA Generator Compatibility — Fits DCA220SSK, DCA300SSC, DCA300SSK, DCA250SSI, DCA400SSK, DCA500SSK, DCA600SSK, DCA800SSK, MQP240, and multiple related configurations.
• Prevents Fastener Back-Out — Lock washers are a first line of defense against vibration-induced loosening; a worn or missing washer can allow critical fasteners to work free during generator operation.
• Electrical System Integrity — Used in generator assemblies where secure fastening directly supports safe, stable electrical connections — correct hardware matters in high-vibration power generation environments.

A lock washer is a deceptively simple but functionally critical hardware component. Its job is to apply continuous friction and spring pressure between a fastener and its mating surface, resisting the loosening effect of vibration and thermal cycling. In diesel generator sets like the DCA series, which run under sustained mechanical vibration and heat, even a single loose fastener in the wrong location can lead to structural play, electrical connection faults, or accelerated wear on surrounding components. Replacing a worn, deformed, or missing lock washer with the correct OEM part — Multiquip 0040018000 — restores proper clamping force and keeps the assembly secured to its original specification.

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.