We couldn't find these anywhere, so we made them! Perfect for making your own custom chopper or bobber oil tank, especially for a Triumph, BSA or other british motorcycle. These mild steel weld-in bungs are threaded for your OEM or OEM-style Triumph oil tank filter feed fitting (OEM # 82-3179, 82-1713, 82-3655, and 82-3182). This is a perfect fit for the stock thread, which is 7/8"-20 UNEF. This is for the bung only, the filter fitting is sold separately!