The Multiquip 511303 is a genuine OEM HHCS 5/16 x 1-1/4 SS designed for MQ600-series trash pumps, including the MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP. As a factory-sourced fastener, it meets the exact dimensional and material specifications required for correct assembly and long-term service on Multiquip trash pump equipment. Sourcing the correct hardware ensures proper clamping load and corrosion resistance in wet, demanding pumping environments. Keep part number 511303 on hand as a service spare to maintain your pump during field maintenance and repair.
Key Features
- Stainless Steel Construction — The SS (stainless steel) designation means this fastener resists corrosion in the wet, high-moisture operating conditions typical of trash pump applications.
- Correct Thread and Length Specification — At 5/16 x 1-1/4, this bolt provides the exact grip length and thread engagement needed for a secure, properly torqued assembly without shimming or substitution.
- Genuine OEM Sourcing — Manufactured to Multiquip's own specification, part 511303 ensures dimensional accuracy across head size, thread pitch, and overall length — critical for fasteners used in pump housing and component assemblies.
- Confirmed Fitment for MQ600-Series Trash Pumps — Verified for the MQ600TD80-TLRB, MQ600TD80-TLRP, MQ600H, MQ600HTB, and MQ600HTP, so you can order with confidence for the correct machine.
- Service and Rebuild Ready — A cost-effective item to stock alongside other consumable hardware, keeping your pump fully serviceable without sourcing delays during maintenance windows.
A hex head cap screw (HHCS) is a standard threaded fastener used to clamp and secure components together within a machine assembly. In trash pump applications, fasteners like the 511303 are used to hold housings, covers, and structural components in place under continuous vibration and exposure to water and debris. Using the correct fastener — with the right material grade, thread specification, and head geometry — ensures joints stay properly torqued and components remain aligned through demanding pump operation. A missing, incorrect, or corroded fastener can lead to loose assemblies, fluid leaks, or accelerated wear at mating surfaces.
Part Details
| Part Number | 511303 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHCS 5/16 x 1-1/4 SS |
Compatibility & Fitment
| Name | Model |
|---|---|
| Trash Pumps | MQ600TD80-TLRB |
| Trash Pumps | MQ600TD80-TLRP |
| Trash Pumps | MQ600H |
| Trash Pumps | MQ600HTB |
| Trash Pumps | MQ600HTP |
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.
