Description
Overview
The Coarse Thread Bung (Part No. RWB 1947) is a plug and washer only set for marine drain fittings that already have a matching coarse thread socket installed. It is Australian made from durable plastic and includes a coloured washer plus a retainer lug. For the official specification and dimensions, see the manufacturer page: RWB Marine – Coarse Thread Bung only (RWB1947). This Coarse Thread Bung is a simple, service-friendly replacement that restores a clean seal without changing the drain body.
Features
- Coarse Thread Bung with positive sealing plug and coloured plastic washer
- Australian made plastic construction that resists sun and salt
- Retainer lug to keep the plug handy when removed
- Supplied as bung and washer only for quick like-for-like replacement
Specifications and Materials
| Part Number | RWB 1947 |
|---|---|
| Thread | Coarse |
| Internal flow size | 17 mm |
| Hole cut-out size | 25 mm |
| Construction | All-plastic body with coloured washer |
These dimensions match common small-craft drain sockets that use a 25 mm cut-out and 17 mm internal flow.
Compatibility and Fitment
The Coarse Thread Bung suits existing coarse thread drain sockets found on many runabouts, tinnies and dinghies. Because it is plug and washer only, confirm your boat already has a compatible socket or drain tube installed. Measure the cut-out and check thread type before ordering to ensure the Coarse Thread Bung is a direct swap.
Compliance and Safety
Marine plastic and the supplied washer provide a reliable seal when the threads are clean and undamaged. Inspect the sealing face regularly, rinse grit from the seat, and replace the washer if it shows flattening or cracking. Hand tighten only. Do not overtighten into plastic substrates.
Marine Applications
– Bilge and transom drains on small to medium trailer boats
– General hull and cockpit drain points that use a coarse thread socket
– Spare Coarse Thread Bung carried on board for emergencies
Why Choose Argomarine
We verify every Coarse Thread Bung listing against manufacturer data so you receive the correct plug and washer set first time. Orders are packed securely and dispatched quickly, which keeps your boat on the water with less downtime.
Browse related bungs and drain accessories in our Boat & Trailer Accessories
