Tube Stub Connectors/Adapters Tube Stub Connectors/Adapters Bulkhead Reducer/Adapter Part Number: U-BR Brand: Unilok Bulkhead Reducer/Adapter Calibration Union Part Number: U-CU2 Brand: Unilok Calibration Union Female Adapter Part Number: U-FA Brand: Unilok Female Adapter Male Adapter Part Number: U-MA Brand: Unilok Male Adapter Port Connector Part Number: U-PC Brand: Unilok Port Connector Reducer/Adapter Part Number: U-R Brand: Unilok Reducer/Adapter Reducing Port Connector Part Number: U-RPC Brand: Unilok Reducing Port Connector 1