Radiator screw coupling straight 3/8" x 12 mm unfinished brass

Radiator screw coupling straight 1/2" x 12 mm unfinished brass

Radiator screw coupling straight 1/2" x 15 mm unfinished brass

Radiator screw coupling straight 3/8" x 12 mm nickel-plated brass

Radiator screw coupling straight 1/2" x 12 mm nickel-plated brass