The 7ME3960-3CM20 is the mounting chain kit for the SITRANS FS220 ultrasonic flowmeter. It includes two 760 mm and two 1500 mm chain lengths — enough to strap a pair of clamp-on transducers to pipe diameters that a single length wouldn't reach. The legacy part number 1012ML-2 cross-references the same hardware; if you're replacing a kit with that marking, this is the direct current-order-code match.
RoHS compliant since 01-01-10, and REACH candidate-list information is available through the standard compliance documentation channel. Export control is straightforward — AL: N, ECCN: EAR99I — no ITAR or dual-use restrictions on this hardware.
The Group Code R3P3 and Product Group 4727 are Siemens internal classification fields. R3P3 groups this under the SITRANS FS220 accessory line, and 4727 is the broader flow-measurement product group. Both confirm this is a flowmeter mounting accessory, not a sensor or transmitter — useful for BOM classification or when filtering spare-parts lists.