The Multiquip EC400050 Hex Nut 1/2" SDP-2 is a genuine OEM fastener designed for the SDP-2 diaphragm pump. As an authorized Multiquip parts source, DHS Equipment supplies this component direct — so you get the exact nut specified for your machine, not a generic substitute. This part is confirmed for SDP-2 series diaphragm pump applications.
Key Features
- Correct Thread Specification — Manufactured to the precise 1/2" thread dimensions required by the SDP-2 diaphragm pump, ensuring proper torque and secure fastening without stripping or cross-threading.
- Genuine OEM Component — Sourced directly from Multiquip, this hex nut meets the same material and dimensional standards as the original hardware installed at the factory.
- Direct Replacement for SDP-2 — Engineered specifically for the SDP-2 diaphragm pump; drops into place without modification or re-engineering of the fastener location.
- Structural Integrity Under Pump Operation — A correctly torqued hex nut keeps pump assemblies sealed and aligned during operation; a loose or undersized substitute can lead to vibration-induced loosening, leaks, or component damage.
- Part of a Complete OEM Hardware System — Using the correct Multiquip-spec fastener keeps pump hardware consistent across the assembly, supporting long-term integrity of bolted connections.
A hex nut is a fundamental fastening component that secures bolted joints throughout the pump assembly. On a diaphragm pump like the SDP-2, properly torqued fasteners are critical — they hold housings, brackets, and fluid-path components in tight alignment under continuous vibration and pressure cycling. When a hex nut is worn, corroded, or replaced with an incorrect size, joint integrity is compromised, which can allow components to shift, leak, or fail prematurely during pumping operations.
For questions about fitment or to confirm this is the right part for your SDP-2, contact the DHS Equipment parts team before ordering.
Part Details
| Part Number | EC400050 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Nut 1/2" SDP-2 |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
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.
