Allstar Performance Adapter, Straight, 1/8" NPT Male, 5/16" Hose Barb, Aluminum SKU ALL-99312 $4.49 Quantity discounts available QuantityPrice (0)No Reviews yet Number of Pieces Item Custom Price Quantity -+ Add to Cart Details Commonly used fitting threads into the filler neck on most radiators allowing connection to an over flow tank. Aluminum fitting has 1/8" NPT threads a... Details Back DetailsCommonly used fitting threads into the filler neck on most radiators allowing connection to an over flow tank. Aluminum fitting has 1/8" NPT threads and accepts a 5/16" hose Ratings & ReviewsNo reviews availableBe the first to Write a Review