Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W7 70 30 10 found under Chart Recording Instrument by Weksler Glass Thermometer Corp. The National Stock Number assigned to this part is 7530010057398, 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 W7 70 30 10.