Refer to stock number ; 366-1901 366-1901 and range for interface seals. TE Connectivity Universal Mate-N-Lok Connector Wire Seals. TE Connectivity Universal Mate-N-Lok connector wire seals essentially splash proof/immersion proof an existing universal mate-n-lok connector, two seals and one interface seal is required when mating two free hanging connectors, a closed bottom header is required for wire to board connections. To achieve sealing it is necessary to use one interface seal and two wire seals per connector Crimp contacts stock no. ; 366-4376 366-4376 or ; 366-4382 366-4382 must be used with these seals Available in 2 to 15 way versions