Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1V7-18-30 found under Valve Restrictor Check by Hi Shear Corporation. The National Stock Number assigned to this part is 4820003737891, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1V7-18-30.