Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST6 1189 found under Gage Check by Aar Parts Trading Inc. The National Stock Number assigned to this part is 5220002374585, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST6 1189.