Multiquip 0040012000 Spring Washer SST, SSK, SSM, 12mm Brass

The Multiquip 0040012000 is a genuine OEM Spring Washer SST, SSK, SSM, 12mm Brass designed for Multiquip welder models including the DLW400ESA4, DAW500SA4, DLW330X2, DLW400ES/ESA/ESA1, and DLW300ES/ESA/ESA1 series. As a factory-sourced component, it meets the exact dimensional and material standards set by Multiquip for these diesel light welder and diesel arc welder units. Sourced directly through authorized channels, the 0040012000 delivers the consistent fit and corrosion resistance that brass hardware demands in generator and welder applications. Cross-check your model code against the fitment list before ordering to confirm compatibility.

Key Features

• Brass Construction for Corrosion Resistance — The 12mm brass spring washer provides inherent resistance to oxidation and galvanic corrosion, making it well suited for the electrical and mechanical fastening environments found in welder and generator assemblies.
• Genuine OEM Component — Manufactured to Multiquip's original material and dimensional specifications, ensuring the washer delivers the correct spring tension and seating contact for its intended fastener stack.
• Direct Drop-In Replacement — Sized to 12mm and matched to the SST, SSK, and SSM configurations used in the DLW and DAW welder series, so the washer installs exactly as the original without rework.
• Broad Welder Series Fitment — Compatible with DLW400ESA4, DAW500SA4, DLW330X2, DLW400ES/ESA/ESA1, and DLW300ES/ESA/ESA1 models, covering a wide range of Multiquip diesel light welder and diesel arc welder units.
• Maintains Fastener Preload Integrity — A worn or missing spring washer allows fasteners to back out under vibration, leading to loose connections and potential equipment faults. Replacing with part 0040012000 restores proper clamping force.
• Electrical Safety Relevance — In welder and generator assemblies, loose fasteners caused by degraded washers can compromise grounding and bonding connections. Using the correct OEM washer supports secure, consistent electrical continuity.

A spring washer is a hardened, slightly curved or coiled washer placed beneath a fastener to maintain clamping load under vibration and thermal cycling. In welder and generator equipment, fasteners are exposed to constant engine vibration and heat expansion, which can gradually loosen connections over time. When a spring washer loses its tension or corrodes, fasteners back out, leading to mechanical looseness or degraded electrical connections — both of which can cause operational faults or safety hazards in high-output welding equipment.

DHS Equipment is an authorized Multiquip parts dealer. If you need help confirming fitment for part number 0040012000 or have questions about your specific machine, contact our parts team directly.

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.