The Multiquip 509161 Flat Washer 5/16 is a genuine OEM replacement fastener component designed for a wide range of Multiquip equipment including Essick stationary mixers, Whiteman hydraulic power buggies, and Multiquip walk-behind rollers. As an OEM part sourced directly through Multiquip, the 509161 matches the original specification used on the production line, ensuring a correct fit across all listed models. Compatible equipment includes the PRO12, PRO12E51, PRO12E53, and PRO20 Essick mixer series; WBH-16, WBH-16E, WBH-16F, WBH-16EF, WBH-16EAWD, WBH-16EAWDF, WBH-21EFP, WBH-21EPA, and WBH21EPA power buggies; WTB-16 and WTB-16PD track buggies; and V305EH, V305EK, and AR14H roller models. Keeping the correct hardware in place is critical — a missing or incorrect washer can lead to fastener loosening, surface damage to mating components, or structural play in assemblies that depend on proper load distribution.
Key Features
- Genuine OEM Specification: — Manufactured to the exact dimensional tolerances used in original Multiquip production assemblies, ensuring the correct load-bearing surface area for the 5/16 fastener size.
- Direct Drop-In Replacement: — Seats correctly against mating hardware without modification, maintaining the clamping integrity of the original fastener assembly.
- Broad Equipment Compatibility: — Confirmed fitment across Essick mixer (PRO12, PRO20 series), Whiteman power buggy (WBH-16 and WBH-21 series), track buggy (WTB-16 series), and roller (V305EH, V305EK, AR14H) models.
- Load Distribution Performance: — Spreads fastener clamping force evenly across the joint surface, protecting softer or thinner mating materials from deformation under operational vibration and stress.
- Hardware Integrity Protection: — Prevents fastener pull-through and surface scoring, preserving the structural integrity of assemblies across high-vibration equipment applications.
A flat washer serves as the interface between a bolt or nut and the surface it clamps against. By spreading the clamping load over a wider area, it prevents the fastener from digging into or pulling through the material, which is especially important on equipment subject to constant vibration and heavy use. When a washer is absent, undersized, or damaged, fasteners can work loose over time or cause localized wear to surrounding components — leading to play in critical assemblies and potential failure of the joint.
For fitment questions or to confirm this part is correct for your specific machine, contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | 509161 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Flat Washer 5/16 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Essick Mixers | PRO12E51 |
| Essick Mixers | PRO12E53 |
| Rollers | AR14H |
| Essick Mixers | PRO12 |
| Power Buggies | WBH21EPA |
| Rollers | V305EH |
| Power Buggies | WBH-16 |
| Power Buggies | WBH-16E |
| Power Buggies | WBH-16F |
| Power Buggies | WBH-16EF |
| Power Buggies | WBH-16EAWD |
| Power Buggies | WBH-16EAWDF |
| Essick Mixers | PRO20 |
| Power Buggies | WTB-16PD |
| Power Buggies | WTB-16 |
| Rollers | V305EK |
| Power Buggies | WBH-21EFP |
| Power Buggies | WBH-21EF |
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.
