Radiator Drain Plug | Stock Brass, 1/4 inch | 66-79 Bronco, 48-79 Ford Truck SKU: 5064

1/4-inch Radiator Drain Plug | 1966–79 Bronco & 1948–79 Ford Truck

Don’t overlook the small but critical parts—this 1/4-inch Brass Radiator Drain Plug is an essential piece of maintaining a reliable cooling system in your classic Bronco or Ford truck. Designed for factory-style copper/brass radiators, this plug provides a secure, leak-free seal when draining coolant for routine service, repairs, or a fresh radiator install.

Constructed from corrosion-resistant brass, it threads in smoothly and holds up to repeated use without galling or seizing, making it a dependable replacement for worn, damaged, or missing drain plugs.

Pro Tip: Radiator drain thread pitch can vary by manufacturer and year. Always verify the thread pitch on your radiator before ordering to ensure proper fit.

• Fits 1966–79 Ford Bronco – Compatible with stock-style copper/brass radiators

• Fits 1948–79 Ford Truck – Works with many factory-style radiators used in classic Ford pickups

• 1/4-Inch Threaded Drain Plug – Common size used on many OE-style radiator drain ports

• Brass Construction – Resists corrosion and holds up to repeated service

• Leak-Free Seal – Helps prevent coolant drips and seepage

Finish your cooling system service the right way—this brass radiator drain plug delivers a secure seal and dependable performance for classic Broncos and Ford trucks.