Description Fleetguard FS1003 is a metal spin-on fuel/water separator filter element for diesel fuel systems, using StrataPore media to provide 10 micron filtration and approximately 98.7% efficiency in removing water and particulates. It features 1-14 UNS-2B mounting threads, a standpipe, an approximate overall height of 248.67 mm, and an outside diameter of 93.73 mm for use in common heavy-duty fuel filter heads. Common OEM and aftermarket cross references include Cummins 3406889 and 4070801, Atlas Copco 5580-0066-40, Donaldson P551003 and P564872, Baldwin BF1263-SP and BF1293-SPS, Luber-Finer LFF1003, FRAM PS8687, and WIX 33604.