Quick Summary
The T-H Marine Drain Plug is a self-retaining, screw-type boat drain plug made for a 1 in hole. It uses a threaded seal with an O-ring and is described as vibration resistant, with a polypropylene body.
This plug is meant for buyers who need a drain plug that stays attached during use and mounts with screws. Two No. 8 countersunk stainless steel screws are required for installation and are not included.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | T-H Marine, for buyers looking for this specific marine drain plug. |
| Product type | Self-retaining screw-type boat drain plug. |
| Opening size | Fits a 1 in hole, so the opening size is the main fit check. |
| Seal | Threaded seal with an O-ring, which is the key sealing feature for this plug. |
| Body material | Polypropylene, which is the stated body material. |
| Installation hardware | Uses two No. 8 countersunk stainless steel screws, not included. |
What to Compare Before Buying
- Hole size: This plug is made for a 1 in hole. Compare that opening to your transom, well, cooler, or tank.
- Attachment method: It is a screw-type plug, so compare it with the mounting method your setup accepts.
- Included hardware: The screws are not included, so confirm you have the needed No. 8 countersunk stainless steel screws.
- Fit purpose: The plug is described for transoms, livewells, bait tanks, coolers, water tanks, and similar uses.
Before You Decide
Confirm the 1 in opening size before choosing an offer. Check that you have the required No. 8 countersunk stainless steel screws, since they are not included. If you need a plug that stays attached during use, this self-retaining design is the main feature to compare against other options.





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