Products search Shop By Category Call 866-674-6225AdaptersCF Flanges and FittingsHigh Vacuum Bellows SS HosesValvesWeld TubesISO Flanges and FittingsKF (QF) Flanges and FittingsAlcatel Vacuum Pump PartsLeybold Vacuum Pump PartsPfeiffer Vacuum Pump PartsWelch Vacuum Pump PartsGreases – SuppliesVacuum Rated HosesUniversities OnlyPressure Measurement VacuumCustom Vacuum Components / Vented ScrewsGS Series Ball ValvesSuper Sale Items316 Stainless Steel ComponentsBriskHeat®ISO 250, SS Center Ring, Viton, Alum Retainer$103.68Product Code: MKISO250CRR Category: ISO,LF Flanges and FittingsCentering Ring SS, Viton O-ring, Alum RetainerAvailability: In stock ISO 250, SS Center Ring, Viton, Alum Retainer quantity Add to cart Free Shipping on Orders Over $100**Exclusions apply. See Shipping & Return Policy for details.A(inch)B(inch) 11.1810.19 Related products Sale! ADAPTER, 1/4″ MALE NPT, KF (QF) 25, 304 SS $51.64 $34.50 ISO 100, SS Center Ring, Viton, Alum Retainer $47.85 ADAPTER, 1/8″ MALE NPT, KF (QF) 40, 304 SS $52.07 ISO 63, SS Center Ring, Viton, Alum Retainer $33.50