Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25.12X1.78-24B7 found under O Ring by Societe Technique Armoricaine. The National Stock Number assigned to this part is 5331006910145, 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 25.12X1.78-24B7.