The Multiquip 1403 is a genuine OEM Flat Head Socket Cap Screw 5/16-24 x 1-1/4 designed for J Series walk-behind power trowels and C30 series concrete pumps. As a factory-sourced fastener, part 1403 ensures the correct thread pitch, head geometry, and material grade to match original assembly specifications. This screw is a direct-fit replacement that installs exactly as the original, keeping critical components properly secured. Verify your model against the fitment list to confirm compatibility before ordering.
Key Features
- Genuine OEM Fastener Grade — Manufactured to the same material hardness and thread tolerance as the original production fastener, ensuring proper clamping force without stripping or loosening under operational vibration.
- Correct Thread Specification — 5/16-24 UNF fine-thread pitch and 1-1/4 inch length match the original tapped holes exactly, so the screw seats fully and flushes cleanly without modification.
- Flat Head Socket Drive Design — The countersunk flat head sits flush with mating surfaces, preventing interference with adjacent components and allowing torque application with a standard hex key.
- Broad Fitment Coverage — Compatible with J Series walk-behind power trowels and C30HDN and C30HDNI series concrete pumps, covering multiple common Multiquip equipment families.
- Structural Integrity Assurance — Using the correct OEM fastener maintains the designed clamping load on assemblies; an incorrect fastener can lead to component loosening, misalignment, or premature wear of mating parts.
A flat head socket cap screw is a threaded fastener designed to sit flush within a countersunk hole, securing two or more components together without protruding above the surface. On walk-behind trowels and concrete pumps, these fasteners hold critical assemblies — such as guard plates, housings, and mounting brackets — under consistent mechanical load and vibration. When a fastener is worn, cross-threaded, or substituted with an incorrect grade or thread pitch, it can lose clamping force, allowing assembled components to shift, vibrate loose, or fail during operation.
For assistance confirming fitment or placing your order, contact the DHS Equipment team directly.
Part Details
| Part Number | 1403 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Flat Head Socket Cap Screw 5/16-24 x 1-1/4 |
Compatibility & Fitment
| Name | Model |
|---|---|
| International Walk-Behind Power Trowels | J SERIES CHINA |
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDNI Zenith |
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.
