{
  "metadata": {
    "id": "smc-kq2s11-35ns",
    "name": "SMC KQ2S11-35NS Male Connector 3/8\" Tube to 1/4\" NPT",
    "type": "connector",
    "description": "SMC KQ2 series straight fitting for 3/8\" OD tubing with a male 1/4\" NPT thread. Model KQ2S11-35NS has a hex socket head design and comes with thread sealant pre-applied for easy installation. It allows a 3/8 inch pneumatic tube to be directly connected to a component with a 1/4\" NPT female port.",
    "manufacturer": "SMC",
    "part_number": "KQ2S11-35NS",
    "datasheet_url": "",
    "tags": [
      "SMC",
      "push-to-connect",
      "3/8 OD tube",
      "1/4 NPT",
      "fitting"
    ],
    "schema_version": "1.4.0",
    "version": "0.2.0",
    "taxonomy": [
      "mechanical.pneumatic"
    ]
  },
  "domains": [
    {
      "domain": "pneumatic",
      "resources": [
        {
          "id": "npt_thread",
          "functions": [
            {
              "name": "pneumatic_connection"
            }
          ],
          "connector_type": "threaded_port",
          "thread_standard": "NPT",
          "thread_size": "1/4\"",
          "thread_gender": "male",
          "port_size": "1/4\"",
          "working_pressure_bar": 10,
          "max_pressure_bar": 10,
          "compatible_fluids": [
            "compressed_air"
          ],
          "fluid_temperature_C": [
            -5,
            60
          ],
          "seal_type": "thread_sealant",
          "description": "Male 1/4\"-18 NPT thread (with factory-applied sealant) for connecting to 1/4\" NPT female port"
        },
        {
          "id": "tube_port",
          "functions": [
            {
              "name": "pneumatic_connection"
            }
          ],
          "connector_type": "quick_connect",
          "tube_od_inch": 0.375,
          "port_size": "3/8\" OD tube",
          "working_pressure_bar": 10,
          "max_pressure_bar": 10,
          "compatible_fluids": [
            "compressed_air"
          ],
          "fluid_temperature_C": [
            -5,
            60
          ],
          "seal_type": "o_ring",
          "description": "Push-to-connect port for 3/8\" outer diameter tubing"
        }
      ],
      "interfaces": [
        {
          "id": "npt_male_output",
          "protocol": {
            "type": "pneumatic",
            "role": "output"
          },
          "requires": [
            {
              "function": "pneumatic_connection",
              "count": 1
            }
          ],
          "constraints": [
            {
              "thread_standard": "NPT"
            },
            {
              "thread_size": "1/4\""
            },
            {
              "thread_gender": "female"
            },
            {
              "max_pressure_bar": ">=10.0"
            },
            {
              "compatible_fluids": "compressed_air"
            }
          ],
          "max_instances": 1,
          "description": "1/4\" NPT male output for threaded ports",
          "name": "Npt Male Output"
        },
        {
          "id": "tube_input",
          "protocol": {
            "type": "pneumatic",
            "role": "input"
          },
          "requires": [
            {
              "function": "pneumatic_connection",
              "count": 1
            }
          ],
          "constraints": [
            {
              "tube_od_inch": 0.375
            },
            {
              "max_pressure_bar": "<=10.0"
            },
            {
              "compatible_fluids": "compressed_air"
            }
          ],
          "max_instances": 1,
          "description": "3/8\" OD tube input connection",
          "name": "Tube Input"
        }
      ],
      "metadata": {
        "working_medium": "compressed_air",
        "max_pressure_bar": 10,
        "fluid_temperature_C": [
          -5,
          60
        ]
      }
    },
    {
      "domain": "mechanical",
      "resources": [
        {
          "id": "fitting_body",
          "functions": [
            {
              "name": "mounting"
            }
          ],
          "material": "brass_plated",
          "dimensions_mm": {
            "length": 40,
            "width": 15,
            "height": 15
          },
          "weight_g": 12,
          "description": "Plated brass fitting body with hex socket design"
        }
      ],
      "interfaces": [],
      "metadata": {
        "mounting_method": "threaded",
        "orientation": "any"
      }
    },
    {
      "domain": "thermal",
      "resources": [],
      "interfaces": [],
      "metadata": {
        "operating_temperature_C": [
          -5,
          60
        ],
        "storage_temperature_C": [
          -20,
          80
        ]
      }
    }
  ],
  "design_rules": [
    "No additional thread tape is required as the fitting includes a thread sealant; simply tighten into the port (approximately 1.5-3 turns past hand-tight)",
    "Cut the 3/8\" tubing squarely and insert fully until it bottoms out in the fitting",
    "Avoid side loading the tube; use proper routing so the tube enters the fitting straight"
  ],
  "validation_requirements": [
    "Confirm the receiving port is 1/4\" NPT; other thread types will not seal even if similar in size",
    "Ensure the 3/8\" OD tubing is compatible (SMC inch-size series or equivalent) and is not smaller metric tubing",
    "After assembly, pressure-test the connection to verify no leaks (the sealant should provide an immediate airtight seal)"
  ],
  "usage_notes": "Use this fitting when a high-flow 3/8\" line needs to connect to a component with a 1/4\" NPT port. The hex-socket design allows tightening with an Allen wrench in confined spaces. Pre-coated sealant on the threads saves assembly time and ensures a reliable seal.",
  "application_examples": [
    "Connecting a 3/8\" OD main air supply line to a filter or regulator with 1/4\" NPT ports",
    "Installing a larger diameter tube for an air cylinder feed while the valve has 1/4\" NPT outlet ports"
  ],
  "compatibility_notes": "Only for use with 3/8\" outer diameter tubing. The integrated sealant is typically compatible with air and inert gases. The fitting's materials (plated brass and PBT plastic) are suitable for standard pneumatic applications.",
  "warnings": [
    "Once installed, the thread sealant is effective for a limited number of re-connections; avoid repeatedly removing and reusing the fitting as the sealant may degrade",
    "Keep the release button (collet) clean; dirt can prevent the collet from gripping the tube properly",
    "Not recommended for use with fluids other than air without consulting material compatibility (water may be okay, but oils or solvents could degrade the O-ring or sealant)"
  ]
}