The Multiquip 515249 Jam Nut is a genuine OEM fastener designed for LS-series hydraulic concrete pumps and the WTB-16PD power buggy. This OEM replacement ensures the correct thread engagement, torque retention, and dimensional accuracy required by the original design. Compatible models include the LS300, LS300G, LS300GK, LS300P, LS400, LS500, LS600, LS600P, LS40D, LS40TD, LS50TD, LS60TD, and WTB-16PD — making 515249 a versatile fastener stocked by operators running multiple Multiquip machines. Sourced directly through DHS Equipment, this part ships as a genuine Multiquip component with full OEM traceability.
Key Features
- Genuine OEM Thread Specification — Manufactured to the exact thread pitch, diameter, and hardness grade called out in the Multiquip engineering spec, so locking force is consistent every time.
- Direct-Install Fastener — Drops into the same threaded position as the original, with no chasing or reworking of mating threads required on properly maintained equipment.
- Broad LS-Series and Power Buggy Fitment — Confirmed for LS300, LS400, LS500, LS600, LS40D, LS40TD, LS50TD, LS60TD, and LS600P concrete pumps, as well as the WTB-16PD track buggy.
- Secure Locking Under Vibration — A jam nut is the last line of defense against fastener back-off on high-vibration hydraulic pump assemblies; the correct grade and thickness are critical to maintaining clamp load through demanding pour cycles.
- Fuel and Fluid System Safety Relevance — On hydraulic-driven concrete pumps, improperly torqued or incorrect jam nuts on hydraulic line fittings and control linkages can allow movement that leads to leaks or loss of control; using the OEM-specified part mitigates this risk.
A jam nut is a thin secondary nut threaded onto a bolt or stud and tightened against a primary nut or fitting to lock both in place and resist loosening from vibration or dynamic loads. On hydraulic concrete pumps like the LS-series, jam nuts secure adjustment rods, valve stems, and hydraulic fittings where maintaining a fixed position is critical to consistent pump output and operator safety. When a jam nut is worn, cross-threaded, or missing, the primary fastener or fitting it backs up can work loose during operation, leading to misadjustment, hydraulic fluid loss, or uncontrolled movement of mechanical linkages.
Confirm fitment using your equipment model number before ordering. For fitment questions or bulk pricing, contact the DHS Equipment team directly.
Part Details
| Part Number | 515249 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Jam Nut |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS600 |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS60TD |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS600P |
| Mayco Pumps | LS300GK |
| Mayco Pumps | LS300G |
| Power Buggies | WTB-16PD |
| Mayco Pumps | LS300P |
| Mayco Pumps | LS300 |
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.
