The Multiquip 2023161 Cotter Pin 3/16" x 1-1/4" Lg is a genuine OEM fastener designed for STOW Diaphragm Pumps — including SDP-2, SDP-3, and CA90749 — and the MQ-D206H diaphragm pump. As a direct OEM replacement sourced through Multiquip's authorized parts program, this cotter pin meets the exact size and material specification called for in the original assembly. Stocking this low-cost hardware item means you are never held up by a missing fastener when it counts most on the jobsite.
Key Features
- Exact OEM Dimensions — 3/16" diameter by 1-1/4" length matches the original pin specification to ensure a secure, wobble-free installation in the pump linkage or valve assembly.
- Genuine Multiquip Part — Sourced directly from Multiquip, this cotter pin carries the same material grade and finish as the component that left the factory, so fit and retention are never a question.
- Broad Diaphragm Pump Fitment — Confirmed compatible with STOW Diaphragm Pump models SDP-2, SDP-3, and CA90749, as well as the Multiquip MQ-D206H diaphragm pump.
- Secure Fastening for Critical Linkages — A correctly installed cotter pin locks pivot pins and clevis connections in place, preventing unintended movement or separation under the cyclical stress of pump operation.
- Safety-Critical Hardware — In diaphragm pump assemblies, a missing or failed cotter pin can allow pivot pins to walk out during operation, creating a loss of control or mechanical damage risk; using the correct OEM pin keeps the assembly safely retained.
A cotter pin is a split fastener inserted through a drilled hole in a pin or shaft and then bent open to lock the pin in position. In diaphragm pump assemblies, cotter pins are commonly used to secure clevis pins, valve linkage rods, and other pivot points that are subject to repeated reciprocating motion. When a cotter pin shears, corrodes, or falls out, the connection it was securing can shift or separate entirely, leading to erratic pump behavior, accelerated wear on surrounding components, or a complete loss of pumping function. Replacing a worn or missing cotter pin promptly with the correct OEM specification part — like Multiquip 2023161 — restores the integrity of the fastened joint and prevents more costly damage downstream.
Part Details
| Part Number | 2023161 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Cotter Pin 3/16" x 1-1/4" Lg |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | CA90749 |
| MQ Diaphragm Pumps | MQ-D206H |
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.
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