Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55-60015 ITEM 7 found under Valve Stop Compress by Tactair Fluid Controls Inc. The National Stock Number assigned to this part is 4820012869724, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 55-60015 ITEM 7.