Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HSHRFS1001-3-47400-503-ORSN found under O Ring Kit by Hiller Companies Inc The. The National Stock Number assigned to this part is 5331015624102, 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 HSHRFS1001-3-47400-503-ORSN.