Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5A21196B found under Cap Filler Opening by Modine Mfg Co. The National Stock Number assigned to this part is 2930000586568, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5A21196B.