Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3500042-004 found under Valve Sprinkler by Evac North America Inc. The National Stock Number assigned to this part is 4210013705636, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3500042-004.