Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 83855 found under Chasers Thread Cutting by Curtistoledo Inc. The National Stock Number assigned to this part is 5136005175542, and the Federal Supply Class is 5136 Taps Dies And Collets Hand And Machine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 83855.