Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HD4-1-100B found under Capacitor Fixed Plastic Dielectr by Films Inc. The National Stock Number assigned to this part is 5910006159975, and the Federal Supply Class is 5910 Capacitors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HD4-1-100B.