Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H03 4-2.5-29-T-INTERNALS-SY100 found under Internals Kit by Hoffer Flow Controls Inc. The National Stock Number assigned to this part is 6680014655488, 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 H03 4-2.5-29-T-INTERNALS-SY100.