The Multiquip 2025818 Jam Nut 5/8-18 UNF is a genuine OEM fastener designed for STOW and MQ diaphragm pump models including SDP-2, SDP-3, CA90749, and MQ-D206H. As an OEM-sourced component, it is manufactured to the exact thread specification and dimensional tolerances required by the original equipment, ensuring a secure, correctly torqued installation every time. When you need to maintain or service your diaphragm pump hardware, fitting the correct 5/8-18 UNF jam nut is essential to preserving the integrity of the threaded assembly. DHS Equipment stocks this Multiquip 2025818 so you can get the right part and keep your equipment back in service quickly.
Key Features
- Correct Thread Form — Machined to 5/8-18 UNF specification, ensuring full thread engagement and proper torque load on your pump assembly.
- Genuine OEM Component — Sourced directly from Multiquip, this jam nut meets the same material and dimensional standards as the hardware installed at the factory.
- Broad Diaphragm Pump Fitment — Compatible with SDP-2, SDP-3, CA90749, and MQ-D206H diaphragm pump models, covering both STOW and MQ product lines.
- Drop-In Hardware Replacement — Matches the original fastener profile exactly, so it seats and locks against the mating nut or fitting without any rework to the surrounding hardware.
- Fastener Integrity Where It Counts — A correctly installed jam nut locks the primary fastener in place under vibration and pressure cycling; a worn or incorrect nut risks loosening and potential fluid or mechanical failure.
A jam nut is a thin locking nut threaded onto a fastener or stud and tightened against a primary nut or fitting to prevent it from backing off under vibration, pressure, or repeated mechanical cycling. On diaphragm pumps, where components are subject to continuous reciprocating motion and fluid pressure, maintaining secure fastener assemblies is critical to leak-free, reliable operation. When a jam nut is stripped, out of specification, or missing entirely, the primary fastener can loosen over time, compromising the mechanical connection and potentially leading to misalignment, fluid leaks, or component damage.
For questions about fitment or to confirm this is the correct part for your equipment, contact the DHS Equipment team directly.
Part Details
| Part Number | 2025818 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Jam Nut 5/8-18 UNF |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | CA90749 |
| MQ Diaphragm Pumps | MQ-D206H |
| STOW Diaphragm Pumps | SDP-3 |
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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