Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GG-F-001189 TY1ST2 found under Pen Fountain by General Services Administration Inc. The National Stock Number assigned to this part is 7520005593266, 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 GG-F-001189 TY1ST2.