Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T1-3-4-10V found under Lamp Incandescent by Gte Products Corp. The National Stock Number assigned to this part is 6240009007674, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like T1-3-4-10V.