The Multiquip 509143 is a genuine OEM Hex Nut 5/16 designed for AR13H, AR13HA, AR13HAR, AR13HC, AR14H asphalt ride-on rollers and WBH-16, WBH-16E, WBH-16EF, WBH-16F, WBH-16EAWD, WBH-16EAWDF, and WBH-21EF Whiteman hydraulic power buggies. As a direct Multiquip OEM part, 509143 is manufactured to the exact specification required by these machines — no guesswork on thread pitch, width across flats, or material grade. Sourced and sold by DHS Equipment, this fastener ships as a verified replacement to keep your equipment properly assembled and running as intended.
Key Features
- Genuine OEM Fastener Grade — Manufactured to the exact thread specification and hardness grade called out in the Multiquip parts manual, ensuring proper torque retention in structural and mechanical connections.
- Direct Drop-In Replacement — Threads directly into existing hardware positions on compatible roller and power buggy assemblies with no chasing or re-tapping required.
- Broad Fitment Across Two Equipment Families — Confirmed fit for AR13H, AR13HA, AR13HAR, AR13HC, and AR14H ride-on asphalt rollers, plus WBH-16 series and WBH-21EF Whiteman hydraulic power buggies.
- Correct Hex Geometry — The 5/16 hex profile seats properly with standard tooling, maintaining correct clamping load across fastened joints and preventing loosening under vibration.
- Prevents Joint Failure in High-Vibration Environments — Rollers and power buggies operate under continuous vibration and load cycling; using a correctly spec'd OEM nut helps maintain joint integrity and prevents component separation.
A hex nut is a six-sided threaded fastener that mates with a bolt or stud to clamp two or more components together. In ride-on rollers and power buggies, hex nuts secure critical assemblies — including drive, frame, and auxiliary system brackets — that are subjected to constant vibration and dynamic loads during operation. When a hex nut is the wrong specification, under-torqued, or worn, the joint can loosen progressively, leading to component misalignment, accelerated wear on surrounding hardware, or outright separation of fastened parts. Using the correct OEM-specified nut, such as the Multiquip 509143, ensures the connection holds to design intent throughout the service interval.
For fitment questions or to confirm this part is correct for your specific serial number range, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 509143 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Hex Nut 5/16 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | AR13HC |
| Rollers | AR13HA/HAR |
| Rollers | AR13H |
| Rollers | AR14H |
| Power Buggies | WBH-16 |
| Power Buggies | WBH-16E |
| Power Buggies | WBH-16EF |
| Power Buggies | WBH-16F |
| Power Buggies | WBH-21EF |
| Power Buggies | WBH-16EAWD |
| Power Buggies | WBH-16EAWDF |
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.
