3M CIR Series Repair Connectors - Product Selection Guide (PDF 7.8 K)
3M™ Lugs and Connectors, 2015 Electrical Products Catalog - Catalog (PDF 2.1 MB)
3M™ Splices, 2015 Electrical Products Catalog - Catalog (PDF 11.7 MB)
This connector has 5411R splice body and a 0.63 in (16 mm) O.D. This connector is to be used with molded rubber splice kits.
The 3M™ Connector CIR-21 is an extra long connector that is used to bridge gaps up to six inches when a piece of damaged cable is removed. They can be used with copper or aluminum conductors.