The Wacker Neuson Setscrew 1/4-20 x 1/4 is a genuine OEM component designed for PDT3A, PDI3A, PDI3A(I), PDT2A, and PDI2A(I) series diaphragm pumps. As a factory-sourced part, the is manufactured to the exact thread specification and dimensional tolerances required for correct engagement and holding force in the pump assembly. Sourcing genuine OEM hardware like this setscrew ensures the fastener performs exactly as intended — no guesswork on thread form, drive size, or material grade. Confirm your model number against the fitment list before ordering to ensure a direct, drop-in installation.
Key Features
- Correct Thread Specification — 1/4-20 x 1/4 threading matches the OEM-spec tapped bore exactly, ensuring full thread engagement without cross-threading or stripping.
- Genuine OEM Part — Sourced directly from Wacker Neuson, this setscrew carries the same material grade and hardness as the original, maintaining the clamping integrity the pump assembly depends on.
- Broad Pump Series Fitment — Compatible with PDT3A, PDI3A, PDI3A(I) Pump Diaphragm, PDT2A, and PDI2A(I) Pump models, covering a wide range of Wacker Neuson diaphragm pump configurations.
- Secure Component Retention — A correctly tensioned setscrew holds internal pump components firmly in position; a worn, stripped, or incorrect fastener can allow components to shift under load, leading to pump misalignment or failure.
- Direct Drop-In Installation — Installs into the existing tapped bore with no re-tapping or modification, using standard 1/4-20 tooling already found on most service benches.
A setscrew is a headless fastener threaded along its full length and tightened directly into a tapped hole to lock or position a component — most commonly a shaft, collar, or internal assembly part — without protruding above the surface. In a diaphragm pump, setscrews are used to secure critical moving or stationary components in precise alignment; if a setscrew loosens or fails, the component it holds can shift, vibrate out of position, or cause accelerated wear on surrounding parts. Replacing a damaged or missing setscrew with the correct OEM part restores the holding force the original design requires and prevents secondary damage to the pump assembly.
Part Details
| Part Number | 5100075517 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Setscrew 1/4-20 x 1/4 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PDT3A | PDT3A | 5100075507 |
| PDI3A | PDI3A | 5100075508 |
| PDI3A(I) PUMP DIAPHRAGM | PDI3A(I) | 5100075509 |
| PDT2A | PDT2A | 5100075510 |
| PDI2A(I) PUMP | PDI2A(I) | 5100075511 |
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.
