The Multiquip 2021213 Hex Screw 1/2"-13 UNC x 2-1/2" is a genuine OEM fastener designed for Multiquip and STOW diaphragm pump models including SDP-2, SDP-3, MQ-D206H, and CA90749. This is the factory-specified hex screw used in critical assembly points on these diaphragm pumps, ensuring proper clamping force and structural integrity where it matters most. Sourced directly through Multiquip's OEM supply chain, part 2021213 is built to the exact thread specification and dimensional standard required for correct installation. If you're performing a pump rebuild, routine service, or replacing a damaged fastener, this is the correct part to keep your diaphragm pump operating as designed.
Key Features
- Correct Thread Specification — 1/2"-13 UNC threading matches the factory-tapped receiving points on STOW and Multiquip diaphragm pump assemblies, ensuring full thread engagement without cross-threading risk.
- Genuine OEM Quality — Manufactured to Multiquip's exact dimensional and material standards, delivering the tensile strength required to maintain proper clamp load on pump housing joints under operating pressure.
- Broad Diaphragm Pump Fitment — Confirmed compatible with SDP-2, SDP-3, MQ-D206H, and CA90749 diaphragm pump models across the Multiquip and STOW product lines.
- Preserves Pump Seal Integrity — Correct bolt length and grade are critical to achieving even clamping pressure across pump body flanges; using the wrong fastener risks uneven sealing and premature diaphragm failure.
- Drop-In Service Replacement — Installs directly in place of the original fastener with no drilling, rethreading, or hardware substitution needed.
A hex screw may seem like a minor component, but in a diaphragm pump assembly the fasteners holding the pump housing, manifold, and valve plates together are responsible for maintaining the compression and seal that keeps fluid moving efficiently. An incorrect, worn, or under-torqued bolt at these joints can allow flex in the assembly, leading to diaphragm misalignment, fluid bypass, or outright pump failure. Using the specified Multiquip 2021213 Hex Screw 1/2"-13 UNC x 2-1/2" ensures the correct clamp load is achieved during reassembly, protecting the pump's internal components and extending service life between rebuilds.
Part Details
| Part Number | 2021213 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Screw 1/2"-13 UNC x 2-1/2" |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
| MQ Diaphragm Pumps | MQ-D206H |
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | CA90749 |
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.
