The Honda 90043-YB4-000 Stud Bolt (6X50) is a genuine OEM fastener designed for WB20, WB30, WD20, and WD30 water pumps. As a direct Honda OEM component, this stud bolt is held to the same tolerances as the original hardware installed at the factory. Honda supersedes fasteners at serial breaks, so confirm your pump's serial number against the fitment table before ordering to ensure part number 90043-YB4-000 is the correct listing for your unit.
Key Features
- Genuine OEM Hardware — sourced directly from Honda, this stud bolt matches the thread pitch, shank length, and dimensional spec of the original fastener used on these water pumps.
- 6×50 Sizing — the (6X50) designation identifies this specific variant; verify this size matches your pump's requirement before purchase, as other stud bolt sizes are catalogued separately.
- Broad Pump Compatibility — listed for WB20, WB30, WD20, and WD30 Honda water pumps, covering both the general-duty WB and WD lines in 2" and 3" configurations.
- Serial Number Verification Recommended — Honda updates fastener part numbers across production runs; check your serial number against the compatibility table to confirm this is the correct listing for your specific pump.
A stud bolt is a fully threaded or partially threaded fastener anchored into a casting at one end, with a nut driven onto the exposed end to clamp a mating component securely in place. On Honda water pumps, stud bolts are used at critical assembly joints where repeated service access is required, because the fixed stud guides the mating part into position and holds alignment while the nut is tightened. When a stud bolt is damaged, corroded, or broken, the clamping joint it holds can work loose, causing leaks, misalignment, or pump failure — making like-for-like OEM replacement the right call.
Part Details
| Part Number | 90043-YB4-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Stud Bolt (6X50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Water Pump | WB20, WB30, WD20, WD30 | 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.
