3/8 x 3" Dowel Pins, Alloy Steel, Pack of 4 3/8" Diameter - Will only fit applications with a 3/8" hole ASME B18.8.2 Chamfered ends allow of easy insertion of dowel pins into any hole. All dowel pins come with a bright finish and a light protective coat of oil. Dowel Pins are grounded with a diameter tolerance of 0.0001" to 0.0003"