The Multiquip 3055613 is a genuine OEM Hex Screw 5/16" x 1-3/4" 18UNC designed for MQ Diaphragm Pump models including MQ-D305 and D306. As a factory-sourced fastener, it matches the exact thread specification, length, and head geometry called out in the original Multiquip parts documentation. This screw ships ready to install with no modification or fitment guesswork — the correct thread pitch and grip length are built in from the start.
Key Features
- Correct Thread Specification: — Cut to 18UNC thread standard at 5/16" diameter, matching the original torque and clamping requirements of the assembly it secures.
- Genuine OEM Sourcing: — Manufactured to Multiquip's own part specification, so material grade and dimensional tolerances reflect exactly what left the factory.
- Direct Fitment for MQ Diaphragm Pumps: — Confirmed compatible with MQ-D305 and D306 diaphragm pump models; no reworking of threads or hardware substitution needed.
- Structural Integrity Under Pump Loads: — Fasteners in diaphragm pump assemblies are subject to cyclic stress from pump strokes; using the specified screw maintains clamp load and prevents joint loosening over time.
- Exact 1-3/4" Grip Length: — The specified length ensures correct engagement depth — too short risks stripping; too long risks bottoming out. This screw hits the right length the first time.
A hex screw in a diaphragm pump assembly does more than simply hold components together — it maintains the compression and alignment of mating surfaces that must stay sealed against fluid pressure and pump vibration. In diaphragm pump applications, fasteners at the pump housing, valve covers, or mounting points are under repeated cyclic loading with every pump stroke. When a screw is the wrong thread pitch, length, or material grade, it can back out or fail to develop adequate clamp load, leading to leaks, misalignment, or component damage. Using the correct Multiquip 3055613 screw keeps the assembly properly torqued and the pump operating as intended.
Part Details
| Part Number | 3055613 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Screw 5/16" x 1-3/4" 18UNC |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Diaphragm Pumps | MQ-D305 |
| MQ Diaphragm Pumps | D306 |
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.
