The Multiquip 179800100 is a genuine OEM Split Lock Washer 1/2" designed for MQD2H and MQD3H diaphragm pumps. Sourced directly from Multiquip, this fastener hardware component matches the original specification installed at the factory, ensuring a correct, secure fit without the guesswork of sourcing a generic substitute. DHS Equipment supplies this part direct to contractors and service technicians who need to restore their pump to proper working order using the exact hardware specified for these models.
Key Features
- OEM-Grade Fastener Material — Manufactured to the same hardness and spring-tension spec as the original, so the washer delivers consistent locking force under vibration and load cycles common to diaphragm pump operation.
- Drop-In Hardware Fit — Sized at 1/2" to match the bolt pattern on MQD2H and MQD3H assemblies exactly, seating flush without shimming or modification.
- Confirmed Fitment for MQD Diaphragm Pumps — Verified for MQD2H and MQD3H models, so you can order with confidence that 179800100 is the correct part for your machine.
- Vibration Resistance — The split-ring design bites into mating surfaces to resist loosening caused by the continuous vibration inherent to diaphragm pump cycles, helping fastened assemblies stay torqued.
- Genuine Multiquip OEM Part — Carrying the Multiquip part number 179800100, this is an authentic replacement — not a generic equivalent — backed by Multiquip's parts program.
A split lock washer is a hardened, spring-steel ring with a single break and offset ends that bites into both the fastener face and the mating surface when torqued down. Its primary job is to resist the natural loosening effect that vibration and thermal cycling put on threaded connections. On a diaphragm pump like the MQD2H or MQD3H — where the pumping mechanism creates continuous reciprocating motion — fasteners without proper locking hardware can back out over time, leading to leaks, misalignment, or component separation. Replacing a worn or missing split lock washer with the correct OEM piece restores the clamping integrity of the joint and keeps critical assemblies secured during operation.
Part Details
| Part Number | 179800100 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Split Lock Washer 1/2" |
Compatibility & Fitment
| Name | Model |
|---|---|
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
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.
