Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90-42219-001 found under Annunciator by West Coast Specialties Inc. The National Stock Number assigned to this part is 6340014148833, and the Federal Supply Class is 6340 Aircraft Alarm And Signal Systems. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 90-42219-001.