Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 117931 found under Screen Filler Neck by Rbc Transport Dynamics Corp Div. The National Stock Number assigned to this part is 4130000040502, 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 117931.