Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A4175-2 found under Adapter Compressed Gas Cylinder by Fike Corp. The National Stock Number assigned to this part is 8120002014890, and the Federal Supply Class is 8120 Commercial And Industrial Gas Cylinders. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A4175-2.