Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LIBERTY PEN TY3STEFN3PT2 found under Pen Ball Point by National Industries For The Blind. The National Stock Number assigned to this part is 7520014547996, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LIBERTY PEN TY3STEFN3PT2.