Ronstan RF738 Bung Drain Plug – durable plastic replacement plug for RF294 and RF737 housings, available at Barton Marine NZ. Ronstan RF738 Bung Drain Plug – durable plastic replacement plug for RF294 and RF737 housings, available at Barton Marine NZ.
Ronstan RF738 Bung Drain Plug – durable plastic replacement plug for RF294 and RF737 housings, available at Barton Marine NZ.

Ronstan

Ronstan RF738 Bung Only – Replacement Drain Plug 24mm

$4.40 $3.50 Save 20%
Tax included.

The Ronstan RF738 Bung Only (Replacement Drain Plug) is a simple, reliable solution for maintaining a watertight seal in your boat’s drainage system.

Designed as a direct replacement plug for Ronstan RF294 and RF737 drain assemblies, this bung allows you to quickly restore functionality without replacing the entire housing.

Constructed from UV-stabilised nylon, the RF738 is highly resistant to corrosion, UV exposure, and impact, making it ideal for long-term use in harsh marine environments.

The plug features a coarse threaded design, enabling fast installation and a secure, watertight seal. Integrated retaining legs help prevent loss, ensuring the plug stays attached when removed.

Lightweight and easy to use, this bung is commonly found on dinghies, trailer boats, kayaks, and small craft, where dependable drainage is essential.

Key Features

  • Replacement bung only – suits RF294 & RF737 housings
  • Watertight seal – prevents water ingress
  • UV-stabilised nylon construction – durable and corrosion-resistant
  • Coarse thread design – quick and secure tightening
  • Retaining legs – helps prevent loss of plug
  • Lightweight (~5g) – minimal added weight

Specifications

  • Brand: Ronstan
  • Model: RF738
  • Product Type: Replacement drain plug (bung only)
  • Compatibility: RF294 & RF737 drain housings
  • Material: UV-stabilised nylon
  • Weight: Approx. 5g
  • Thread Type: Coarse thread
  • Use: Boat drainage sealing

Ideal Applications

  • Dinghies and skiffs
  • Trailer boats
  • Kayaks and tenders
  • Replacement plug for existing bung housings

This is the perfect solution when your existing bung plug is lost, worn, or damaged, without needing to replace the full assembly.

Why Buy from Barton Marine NZ?

  • Trusted NZ marine hardware supplier
  • Fast nationwide delivery
  • Genuine Ronstan replacement parts
  • Ideal for NZ boating conditions

Pro Tip 

  • Always keep a spare RF738 bung onboard—they’re small and easy to lose
  • Check bung tightness before launching every time
  • Replace worn plugs early to avoid water ingress issues