The Multiquip EM16516 is a genuine OEM Jam Nut 1-5/16-16 Left Hand designed for a range of Multiquip concrete pumps, screeds, and related equipment including the LS40, LS40D, LS40TD, LS50TD, LS400, LS500, LS600, LS600P, LS60TD, ST-45HRM, ST-70, WRSPUDF, WRS5200, and WSHE-A Series. As a genuine OEM component, this nut is manufactured to the exact specification required by Multiquip, ensuring a correct fit on left-hand threaded applications where a standard right-hand nut will not work. Sourced directly through authorized channels, the part is the correct service replacement for keeping critical fastening points properly torqued and secure on your equipment.
Key Features
- Left-Hand Thread Specification — Machined to a 1-5/16-16 left-hand thread pitch, this nut is purpose-built for the specific fastening points on Multiquip equipment where rotation would loosen a conventional right-hand nut.
- Genuine OEM Component — Produced to Multiquip's exact dimensional and material standards, delivering the correct thread engagement depth and clamping force for the application.
- Broad Equipment Compatibility — Fits LS-series hydraulic concrete pumps (LS40, LS40D, LS40TD, LS50TD, LS400, LS500, LS600, LS600P, LS60TD), ST-series concrete pumps (ST-45HRM, ST-70), WRS ride-on screeds (WRSPUDF, WRS5200), and WSHE-A Series vibratory screeds.
- Direct Service Replacement — Drops into the existing fastening point without modification, restoring the assembly to its original locked and torqued condition.
- Structural Integrity Under Load — A properly torqued jam nut locks the primary nut in place and prevents loosening under vibration and operational stress; a worn or missing jam nut allows fastener creep that can lead to misalignment or component failure.
- Verified Part Number — Order with confidence using Multiquip part number EM16516 to confirm you are receiving the correct left-hand threaded fastener for your machine.
A jam nut is a thin, secondary nut threaded onto the same fastener as the primary nut and tightened against it to create a locking force that resists loosening caused by vibration or dynamic loads. In concrete pumps and screeds, this type of fastener is commonly used on rotating or oscillating shaft assemblies where the direction of rotation would otherwise back off a conventional nut — making the left-hand thread a critical design feature, not an interchangeable detail. When a jam nut is missing, damaged, or replaced with the wrong thread direction, the primary fastener can work loose during operation, leading to shaft play, component misalignment, or accelerated wear on surrounding parts.
Part Details
| Part Number | 16516 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Jam Nut 1-5/16-16 Left Hand |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS-40 |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS400 |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS600P |
| Mayco Pumps | LS60TD |
| Submersible Pumps | ST-45HRM |
| Submersible Pumps | ST-70 |
| Ride-On Roller Screeds | WRSPUDF |
| Mayco Pumps | LS40D |
| Ride-On Roller Screeds | WRS5200 |
| Vibratory Screeds | WSHE-A Series |
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.
