The Multiquip 505123 Hex Head Bolt is a genuine OEM fastener designed for hydraulic-driven concrete pump models including the LS300GK, LS300G, LS600P, C30HDGA, LS300P, LS600, LS50TD, LS40TD, LS500, LS400, LS40D, and LS60TD. As a direct OEM replacement, this bolt is manufactured to the exact grade and dimensional specification called out in the Multiquip parts program, ensuring correct torque retention and a secure fit in the application. Sourcing the correct fastener matters on concrete pump assemblies where vibration, hydraulic pressure, and continuous cycling place sustained stress on every connection point. DHS Equipment stocks this part to keep your Mayco and LS-series pump back in service without substitution or guesswork.
Key Features
- OEM-Grade Fastener Material — Manufactured to the exact hardness and tensile rating specified for concrete pump assemblies, where fastener failure under hydraulic load is not an option.
- Direct Bolt-In Replacement — Matches the original thread pitch, shank diameter, and head dimensions so it seats and torques correctly without rework or shimming.
- Broad LS-Series Compatibility — Confirmed fitment across LS300GK, LS300G, LS300P, LS300, LS400, LS500, LS600, LS600P, LS40D, LS40TD, LS50TD, LS60TD, and C30HDGA models.
- Sustained Clamping Force — Correct fastener grade maintains consistent clamping load through the vibration and pressure cycles that characterize hydraulic concrete pump operation, preventing joint loosening over time.
- Genuine Multiquip Part — Sourced directly through the Multiquip OEM parts program, so the grade marking, thread form, and dimensional tolerances match the original hardware exactly.
A hex head bolt in a concrete pump assembly serves as the primary mechanical fastener holding critical structural and hydraulic components together under repeated load. On hydraulic-driven LS-series pumps, fasteners are subjected to continuous vibration, pressure pulses, and the weight of the pumping mechanism itself — conditions that demand the correct grade and specification rather than an off-the-shelf substitute. Using an undersized or incorrect-grade bolt in these locations risks joint loosening, component misalignment, or fastener shear, any of which can result in unplanned downtime or damage to surrounding components. Replacing worn or damaged hardware with the correct OEM part restores the clamping integrity the manufacturer engineered into the assembly.
Part Details
| Part Number | 505123 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Head Bolt |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS300GK |
| Mayco Pumps | LS300G |
| Mayco Pumps | C30HDGA |
| Mayco Pumps | LS300P |
| Mayco Pumps | LS600P |
| Mayco Pumps | LS300 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS60TD |
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.
