Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42100556 found under Filter Drier Refrigerant by Northland Corporation. The National Stock Number assigned to this part is 4130013435900, and the Federal Supply Class is 4130 Refrigeration And Air Conditioning Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 42100556.