The Multiquip 03784501 is a genuine OEM Collar Nut M10 2G40 Hatz designed for the RW1404, RW1404MR, and RW1504HF RAMMAX walk-behind roller series. Sourced directly from Multiquip, this fastener meets the exact specifications set for Hatz-powered roller applications — including RW1404MR units from S/N 326075 and up and RW1504HF units up to S/N. As a genuine OEM component, part number 03784501 delivers the correct thread engagement, collar geometry, and material grade required for proper assembly and long-term retention. DHS Equipment supplies this part ready to ship so your roller gets back to work without unnecessary delays.
Key Features
- Genuine OEM Fastener Grade — Manufactured to Multiquip's exact material and thread specification for the Hatz engine application, ensuring correct clamping force and torque retention under vibration.
- Correct M10 Thread Profile — The M10 collar nut installs directly into the designated Hatz engine interface point with no reworking of mating threads required.
- Confirmed Roller Fitment — Verified for RW1404, RW1404MR (S/N 326075 and up), and RW1504HF (up to S/N 1534188) RAMMAX walk-behind rollers.
- Vibration-Resistant Retention — The collar design provides positive locking engagement, maintaining secure fastening even under the continuous vibration loads typical of compaction roller operation.
- Direct OEM Source — Sold by DHS Equipment as an authorized Multiquip parts distributor, so you receive the exact part Multiquip specifies for this application.
A collar nut is a specialized fastener that combines standard threaded engagement with an integrated collar flange, distributing clamping load across a broader seating surface and resisting loosening under sustained vibration. In a Hatz-powered RAMMAX roller, correctly torqued fasteners are critical to keeping engine-mounted and drivetrain components securely positioned during compaction cycles. A worn, damaged, or incorrect collar nut can lead to fastener back-out, component misalignment, or accelerated wear at the mating interface — all of which interrupt operation and can escalate into more significant repairs if left unaddressed.
For fitment questions or help confirming compatibility with your machine's serial number, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 03784501 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Collar Nut M10 2G40 Hatz |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | RW1404MR S/N 326075 and up |
| Rollers | RW1504HF up to S/N 1534188 |
| Rollers | RW1404 |
| Rollers | RW1404MR |
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.
