These black plastic boating bungs are designed for durability, ease of use, and a watertight seal. Available in both complete bung assemblies and replacement screw-in bungs, they suit a wide range of marine applications. Made from tough, UV-stabilised plastic, they are resistant to corrosion and impact, ensuring long service life. Whether you need a full assembly with base and mounting screws or just a replacement screw-in bung, these options keep your boat dry and secure. Type Base Size (mm) Bung Dia. (mm) Cut Out Dia. (mm) Mount Screws Notes Bung & assembly small coarse thread 52 × 35 18 25 5 c/s Complete bung & housing Bung only small coarse thread – 18 – – Replacement bung for 52 × 35 assembly Bung only small fine thread 2pk – 18 (threaded) – – Fine 3-point threaded replacement bung Bung & assembly large oblong 65 × 50 30 40 4 r/h Complete bung & housing Bung only large oblong – 30 – – Replacement bung for 65 × 50 assembly Bung & assembly large round 66 × 58 31 40 4 r/h Complete bung & housing Bung only large oblong – 31 – – Replacement bung for 66 × 58 assembly
