Parts Catalogue › Stud Heater Plate - 53K402 Image 1 of 1 Stud Heater Plate - 53K402 $3.95 Heater valve studs fitted to the cylinder head. 1/4"unf 1.1250" long. Quantity: Add To Cart Added! Heater valve studs fitted to the cylinder head. 1/4"unf 1.1250" long. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More