The Wacker Neuson is a genuine OEM Hexagonal Head Cap Screw designed for the PDT2, PDT3, PDI2, PDI3, and PD3B series diaphragm trash pumps. As a direct OEM replacement, this fastener is manufactured to the exact specifications required by Wacker Neuson, ensuring proper clamping force and secure assembly across all compatible pump configurations. The covers a wide range of 50mm/2in and 75mm/3in diaphragm trash pump models — including both inline and standard configurations — making it a versatile service part to keep on hand. Sourcing the correct OEM fastener means the hardware integrates cleanly with existing threads and mating surfaces without rework.
Key Features
- OEM-Specified Fastener Grade — Manufactured to the exact tensile strength and thread specification required by Wacker Neuson, ensuring correct clamping load on pump housings and diaphragm assemblies.
- Drop-In Hex Head Design — Standard hexagonal head profile allows installation with common hand and impact tooling, fitting directly into existing threaded bores with no thread chasing or sizing required.
- Broad Diaphragm Pump Compatibility — Confirmed fitment across PDT2, PDT3, PDI2, PDI3, and PD3B series diaphragm trash pumps in both 50mm/2in and 75mm/3in discharge sizes.
- Maintains Diaphragm Housing Integrity — A correctly torqued, properly spec'd cap screw keeps pump housing joints sealed under the cyclic pressure loads generated by diaphragm operation, preventing leaks and housing distortion.
- Critical Sealing Surface Fastener — On diaphragm pumps, housing fasteners that are worn, stretched, or incorrect can allow fluid ingress or housing separation during operation; using the correct OEM part mitigates this risk.
A hexagonal head cap screw is a threaded fastener used to clamp and secure pump housing sections, diaphragm plates, and related structural components together. On diaphragm trash pumps, these fasteners are subjected to repeated mechanical cycling and fluid pressure, meaning correct thread engagement and clamping torque are essential to maintaining a leak-free, structurally sound assembly. When a cap screw is damaged, corroded, or replaced with an incorrect grade or thread pitch, it can result in housing joint failure, diaphragm misalignment, or fluid leaks — all of which compromise pump output and can lead to unplanned service intervals.
Part Details
| Part Number | 5000051311 |
|---|---|
| Old Part Number | 0051311 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Hexagonal Head Cap Screw |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 50mm/2in Diaphragm Trash Pump | PDT2A | 5000007610, 5000007611 |
| 75mm/3in Diaphragm Trash Pump | PDT3A | 5000007614, 5000007615, 5000007616 |
| 50mm/2in Inline Diaphragm Tras h Pump | PDI2A | 5000007624, 5000007625 |
| 75mm/3in Inline Diaphragm Tras h Pump | PDI3A | 5000007628, 5000007629, 5000009407 |
| 50mm/2in Diaphragm Trash Pump | PDT2 | 5000009494, 5000007633 |
| 75mm/3in Diaphragm Trash Pumps | PDT3 | 5000009495, 5000007619 |
| 50mm/2in Diaphragm Trash Pump | PDI2 | 5000009489 |
| 75mm/3in Diaphragm Pump | PD3B | 5000006802 |
| 50mm/2in Diaphragm Trash Pump | PDT2B | 5000007612, 5000007613 |
| 75mm/3in Diaphragm Trash Pump | PDI3 | 5000009491, 5000009492 |
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.
