Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 740A21-12 found under Lead Electrical by Janco Corporation. The National Stock Number assigned to this part is 6150008487666, and the Federal Supply Class is 6150 Miscellaneous Electric Power And Distribution Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 740A21-12.