The Multiquip 505989 Bolt 1/2 x 1-1/4 In. is a genuine OEM fastener designed for Mayco hydraulic concrete pump models including the LS400, LS500, LS600, LS60TD, LS40D, LS40TD, LS50TD, and LS600P. Sourced directly from Multiquip, this bolt meets the exact dimensional and material standards specified for these machines. Correct fastener spec matters on concrete pumping equipment — the right bolt ensures structural integrity across the pump's assembled components. Ordering by part number 505989 confirms you are receiving the exact replacement this equipment calls for.
Key Features
- Exact OEM Specification — Manufactured to the precise 1/2 x 1-1/4 in. dimensions specified by Multiquip for use in Mayco concrete pump assemblies, ensuring correct thread engagement and clamping force.
- Direct Drop-In Replacement — Matches the original fastener's thread pitch, head type, and length so it seats and torques correctly without modification.
- Broad Mayco Pump Compatibility — Confirmed fitment across the LS40D, LS40TD, LS50TD, LS400, LS500, LS600, LS60TD, and LS600P hydraulic concrete pump models.
- Structural Integrity Under Load — Concrete pump assemblies operate under continuous hydraulic pressure and vibration; a correctly rated fastener prevents joint loosening and component separation during operation.
- Genuine Multiquip OEM Part — Supplied as an authorized OEM component, so you know the grade, tensile strength, and finish match what was installed at the factory — no guesswork on a critical fastener.
A bolt of this specification serves as a primary structural fastener within the pump's frame, cover, or component mounting assemblies. On hydraulic concrete pumps like the Mayco LS series, fasteners are subject to sustained vibration, pressure cycling, and the mechanical stress of continuous pumping operations. Using an undersized, incorrect-grade, or worn fastener in these applications can lead to joint failure, misalignment of pump components, or unsafe operation. Replacing with the correct OEM-specified 505989 bolt restores the assembly to its designed clamping load and keeps the pump operating as intended.
Part Details
| Part Number | 505989 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Bolt 1/2 x 1-1/4 In. |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS400 |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS60TD |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS600P |
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.
