Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 135-00-10000-4F POS. 32 found under O Ring by S A I Hydraulics Inc. The National Stock Number assigned to this part is 5331016418069, 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 135-00-10000-4F POS. 32.