Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HV 149 S3 1IN TYPE A found under Sequence Valve by Tts Marine Ab. The National Stock Number assigned to this part is 4820014320585, 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 HV 149 S3 1IN TYPE A.