Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TYP550-14H FLUSH (SPECIAL found under Indicator Sight Liquid by Tobeyco Mfg Co Inc. The National Stock Number assigned to this part is 6680013357822, 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 TYP550-14H FLUSH (SPECIAL.