{
  "thread_types": [
    {"id": "BSPP", "name": "BSPP", "description": "British Standard Pipe Parallel (ISO 228-1)"},
    {"id": "BSPT", "name": "BSPT", "description": "British Standard Pipe Taper"},
    {"id": "NPT", "name": "NPT", "description": "National Pipe Thread (US)"},
    {"id": "metric", "name": "Metric", "description": "ISO Metric Thread"},
    {"id": "SAE", "name": "SAE", "description": "SAE J514 O-Ring Boss"},
    {"id": "JIS", "name": "JIS", "description": "Japanese Industrial Standard"}
  ],
  "common_port_sizes": {
    "BSPP": [
      {"id": "G1/8", "name": "G1/8", "od_mm": 9.73},
      {"id": "G1/4", "name": "G1/4", "od_mm": 13.16},
      {"id": "G3/8", "name": "G3/8", "od_mm": 16.66},
      {"id": "G1/2", "name": "G1/2", "od_mm": 20.95},
      {"id": "G3/4", "name": "G3/4", "od_mm": 26.44},
      {"id": "G1", "name": "G1", "od_mm": 33.25}
    ],
    "metric": [
      {"id": "M10x1", "name": "M10x1", "od_mm": 10},
      {"id": "M12x1.5", "name": "M12x1.5", "od_mm": 12},
      {"id": "M14x1.5", "name": "M14x1.5", "od_mm": 14},
      {"id": "M16x1.5", "name": "M16x1.5", "od_mm": 16},
      {"id": "M18x1.5", "name": "M18x1.5", "od_mm": 18},
      {"id": "M22x1.5", "name": "M22x1.5", "od_mm": 22},
      {"id": "M27x2", "name": "M27x2", "od_mm": 27},
      {"id": "M33x2", "name": "M33x2", "od_mm": 33}
    ],
    "SAE": [
      {"id": "SAE-4", "name": "SAE-4 (7/16-20)", "od_mm": 11.1},
      {"id": "SAE-6", "name": "SAE-6 (9/16-18)", "od_mm": 14.3},
      {"id": "SAE-8", "name": "SAE-8 (3/4-16)", "od_mm": 19.1},
      {"id": "SAE-10", "name": "SAE-10 (7/8-14)", "od_mm": 22.2},
      {"id": "SAE-12", "name": "SAE-12 (1-1/16-12)", "od_mm": 27.0},
      {"id": "SAE-16", "name": "SAE-16 (1-5/16-12)", "od_mm": 33.3}
    ]
  },
  "port_positions": [
    {"id": "axial", "name": "Axial", "description": "Inline with cylinder axis"},
    {"id": "radial_0", "name": "Radial 0°", "description": "Perpendicular, 0° reference"},
    {"id": "radial_90", "name": "Radial 90°", "description": "Perpendicular, 90° from reference"},
    {"id": "radial_180", "name": "Radial 180°", "description": "Perpendicular, 180° from reference"},
    {"id": "radial_270", "name": "Radial 270°", "description": "Perpendicular, 270° from reference"}
  ]
}