The Multiquip 12687 is a genuine OEM 3/8 Sq X 2 Key designed for HTX44, HHN, and HHXD series ride-on power trowels. As a direct Multiquip OEM component, part 12687 is manufactured to the exact material and dimensional specifications required by these machines. This key fits a wide range of Whiteman and international ride-on trowel models including the HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HHN34TVD, HHN31V, HHXD5, HHXG5, HHNG5, and EHHNK5. Sourcing the correct OEM key ensures the shaft and mating component lock together properly — maintaining drive integrity and protecting against costly wear on surrounding parts.
Key Features
- Genuine OEM Material Grade — Manufactured to Multiquip's exact hardness and dimensional spec for this shaft key application, ensuring correct load transfer without deformation under trowel operating torque.
- Drop-In Shaft Fit — Sized at 3/8 square x 2 inches to seat directly into the keyway without filing, shimming, or machining.
- Broad Trowel Fitment — Compatible with HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HHN34TVD, HHN31V, HHXD5, HHXG5, HHNG5, and EHHNK5 ride-on power trowels.
- Drive Integrity — A correctly fitted key locks the shaft and hub in precise rotational alignment; a worn or missing key allows slippage that accelerates damage to both the shaft and the driven component.
- Verified OEM Part Number — Order with confidence using Multiquip part number 12687 to confirm you are receiving the correct key for your machine.
A shaft key is a small but critical fastening component that sits in a machined slot — called a keyway — between a rotating shaft and a hub, gear, or pulley. Its job is to transmit torque between those two parts so they rotate together as a single unit rather than slipping independently. When a key wears, shears, or goes missing, the driven component loses positive engagement with the shaft, which causes power loss, vibration, and rapid erosion of the keyway itself. Replacing a damaged key promptly with the correct OEM part protects the shaft and hub from secondary damage that is far more expensive to repair.
Part Details
| Part Number | 12687 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 3/8 Sq X 2 Key |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | HHXDF4-DF5 |
| Whiteman Ride-On Power Trowels | HHXD5 |
| Whiteman Ride-On Power Trowels | HHN34TVD |
| International Ride-On Power Trowels | EHHNK5 |
| Whiteman Ride-On Power Trowels | HHNG5 |
| Whiteman Ride-On Power Trowels | HHXD5-ES |
| Whiteman Ride-On Power Trowels | HHXG5 |
| Whiteman Ride-On Power Trowels | HHN31V |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
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.
