Description
Overview:
The Pipe Plug 1/2 NPTF Square HD is a genuine Kohler metal plug used to seal threaded ports on small engines for safe, leak-free operation. Built for demanding workshop and site use, it offers a precise fit that helps maintain oil-tight and air-tight seals in engine housings and ancillary components. The square head allows positive engagement with a spanner for reliable tightening and removal, even in confined spaces. Designed for Kohler engines, it is suitable for CH6 and M8 models where a 1/2 inch (12.7 mm) NPTF Dryseal tapered thread is specified. This plug is an ideal direct replacement for worn or damaged plugs referenced under OEM No. 25 139 61-S, supporting routine servicing and effective repairs without modification.
Key Features:
- Genuine Kohler part for correct fit and dependable quality
- 1/2 inch (12.7 mm) NPTF Dryseal tapered thread for tight, leak-resistant sealing
- Square head design for easy installation and removal with a spanner
- Durable metal construction for long service life in harsh conditions
- Direct replacement for OEM No. 25 139 61-S
- Helps maintain engine efficiency by sealing unused or service ports
- Suitable for routine maintenance and repair work on small engines
- Compact form factor for use in tight engine spaces
- Compatible with oil and general engine environments when installed correctly
Typical Applications:
Used to seal threaded engine block or crankcase ports, oil passages, and accessory ports on Kohler small engines. Suitable for replacing missing or damaged plugs during rebuilds, servicing, or fault rectification. Helps prevent leaks, contamination, and pressure loss in applications across mowers, compact equipment, generators, and other machinery powered by compatible Kohler engines.
Also known as:
Square head pipe plug, 1/2 NPTF plug, engine pipe plug, dryseal plug, sealing plug, square drive pipe stopper, NPTF taper plug.
Fits Models:
CH6, M8
Alternate Part Numbers:
25 139 61S, 2513961-S, 2513961S
Product Specifications
| L&S Part No. | 25 139 61-S |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Kohler |
| OEM No. | 25 139 61-S |
| Unit of Sale | 1 |
| Applications | CH6 |
| Machine Type | Engines |
| Fits Brands | Kohler |
| Fits Models | CH6 |
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