Genuine Koshin Washer Size 12 — Part No. 846211012

Product Overview

The Genuine Koshin Washer Size 12 (Part No. 846211012) is an Original Equipment Manufacturer (OEM) heavy-duty structural washer designed specifically for Koshin KTH-100X (4-inch) heavy-duty industrial trash pumps.

Engineered to fit M12 fasteners (ϕ12 nominal inner diameter), this washer is installed alongside the M12 Hexagon Nuts (P/N 827419012 / Pos 9) and Rubber Mounts (P/N 011627301 / Pos 7) on the lower frame base assembly. It distributes high clamping torque evenly across the rubber cushion mounts, protecting the frame and absorbing severe operational vibration from heavy-duty 4-stroke engines.

Key Specifications

Model Compatibility

KOSHIN 4" Heavy-Duty Trash Pumps

• Koshin KTH-100X (4" Heavy-Duty Gasoline Trash Pump)

Design & Key Features

• High-Torque Clamping Support: Distributes M12 nut torque evenly over a wider surface area to prevent bolt loosening caused by continuous high-volume pumping vibration.

• Frame & Mount Protection: Prevents the steel M12 nut from gouging or wear-damaging the rubber mounts (Pos 7) and base frame during assembly and jobsite operation.

• Exact OEM Dimensions: Precision-formed inner and outer diameters guarantee a snug, seamless fit onto factory M12 threaded studs.

Package Includes & Tech Notes

• 1x Genuine Koshin Washer Size 12 (846211012)

• Maintenance Tip: A standard KTH-100X base frame assembly requires 2 pcs of this Size 12 washer (Pos 8) paired with 2 pcs of the M12 Hexagon Nut (P/N 827419012). Inspect for deformation or corrosion whenever servicing engine rubber cushions or base mounts.