The Multiquip EM96826 Jam Nut 3/4-16 is a genuine OEM fastener designed for C30HD-series concrete pumps and the AR14H asphalt ride-on roller. This thin-profile locking nut is threaded to 3/4-16 specification and serves as a direct OEM replacement sourced through Multiquip's authorized parts program. Confirmed fitment spans the full C30HD family — including C30HDNI, C30HDNI Precision, C30HDNI Zenith, C30HDN, C30HDG, C30HDZ, and C30HDGA variants — as well as the AR14H roller, making EM96826 a versatile and commonly needed hardware item across your fleet.
Key Features
- Genuine OEM Threading Accuracy — Cut to 3/4-16 thread specification, ensuring full engagement and correct torque retention on threaded shafts and fastener assemblies.
- Thin-Profile Locking Design — Jam nut profile seats flush against a primary nut or component face to prevent back-off and maintain secure clamping force under vibration and load cycles.
- Broad Fleet Compatibility — Fits the C30HD, C30HDNI, C30HDNI Precision, C30HDNI Zenith, C30HDN, C30HDG, C30HDZ, C30HDGA concrete pumps and the AR14H ride-on roller.
- OEM Part, No Guesswork — Supplied by Multiquip as a genuine OEM component; part number EM96826 cross-references directly to the original equipment bill of materials.
- Prevents Loosening Under Load — A failed or missing jam nut allows fastener assemblies to back off during operation, leading to misalignment, component wear, or mechanical failure — correct replacement keeps critical assemblies locked and stable.
A jam nut is a thin locking nut threaded onto a bolt or shaft alongside a primary nut or bearing, where it is tightened against the primary nut to prevent rotation and back-off. On concrete pumps and rollers, fastener assemblies are subject to sustained vibration and mechanical stress that can gradually loosen standard nuts over time. The EM96826 Jam Nut 3/4-16 provides the locking interface that holds those assemblies in position. When a jam nut is missing, worn, or cross-threaded, the primary fastener can work loose, creating play in the assembly and accelerating wear on surrounding components.
For questions about fitment or to confirm this is the correct part for your machine, contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | EM96826 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Jam Nut 3/4-16 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HD |
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Zenith |
| Rollers | AR14H |
| Mayco Pumps | C30HDG |
| Mayco Pumps | C30HDZ |
| Mayco Pumps | C30HDGA |
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.
