This specification covers the requirements for application of the waterproof signal double lock connector system and twist and lock connector system with a 2.5 mm centerline. The waterproof signal double lock connector system is available in a 2 through 6 position, single row free hanging panel mount configuration for a 22 to 26 AWG wire range. The twist and lock connector system is available in a 4 or 6 position, dual row and 12 position, triple row free hanging panel mount configuration for a 22 to 26 AWG wire range. The optional seals on the waterproof signal double lock and the twist and lock connector system are rated to IP67. If seals are required, the mating interface seal must be used in conjunction with the gang seal. Terminal position assurance (TPA) accessories are available for all wire sizes and may be used on connectors with or without optional seals.