Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D50 0037 ITEMS 3 7 14 20 28 found under O Ring Set by Dante Valve Company Inc. The National Stock Number assigned to this part is 5331015888666, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D50 0037 ITEMS 3 7 14 20 28.