The Honda Q14-0000-187A Star Washer (12MM) is a genuine OEM replacement designed for WDP20 and WDP30 diaphragm water pumps. Sourced directly from Honda, this washer carries the same part number and specification as the original component installed at the factory. This Star Washer (12MM) fits both WDP20 and WDP30 models — confirm your pump's serial number against the fitment table before ordering, as Honda occasionally supersedes hardware at production breaks. Keeping the correct washer in place ensures fastener assemblies on these diaphragm pumps remain properly seated and torqued.
Key Features
- Genuine OEM Honda Part — sourced directly from Honda, matching the original washer specification used on WDP20 and WDP30 diaphragm water pumps
- Direct-Fit Replacement — dimensioned at 12MM to drop straight into place with no modification needed for the correct serial-range pump
- Serial Number Awareness — Honda updates hardware specifications at production breaks, so always verify your pump's serial number against the fitment table to confirm this is the right washer for your unit
- Diaphragm Pump Specific — engineered for WDP-series diaphragm water pumps, including both the WDP20 and WDP30 models
A star washer is a hardened locking washer whose serrated edges bite into the mating surfaces on either side of a fastener joint, resisting loosening caused by vibration. On a diaphragm water pump like the WDP20 and WDP30, where a reciprocating crank and connecting-rod mechanism creates continuous cyclical vibration, maintaining fastener clamp load is essential to keeping assemblies tight and leak-free. A worn, flattened, or missing washer allows fasteners to work loose over time, which can compromise the integrity of the pump and lead to premature wear or operational failure.
Part Details
| Part Number | Q14-0000-187A |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Star Washer (12MM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Diaphragm Water Pump | WDP20, WDP30 | All |
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.
