{
  "height_mm": {
    "min": 7.0,
    "max": 10.0
  },
  "depth_mm": {
    "min": 25.0,
    "max": 28.5
  },
  "lip_across_mm": {
    "max": 1.5
  },
  "lip_depth_mm": {
    "max": 3.1
  },
  "groove_mm": {
    "across_min": 5.0,
    "depth_min": 2.0
  },
  "notes": "Recommended inclusive limits for a new rail: the envelope of the Vector T-strut (7.391 x 25.4 mm) and the Schroff L-KD (10.0 x 28.5 mm), rounded. A lip is optional. Lip depth includes any corner radius. The groove admits a 5.0 mm by 2.0 mm insert. A mounting-screw length fits the window for M3.",
  "provenance": {
    "height_mm": {
      "kind": "informative",
      "source": "Vector drawing 5280006 (7.391 mm); Schroff 34560-184 (10.00 mm)",
      "note": "Inclusive section height across panel, rounded"
    },
    "depth_mm": {
      "kind": "informative",
      "source": "Vector drawing 5280006 (25.4 mm); Schroff 34560-184 (28.50 mm)",
      "note": "Depth from front face to back face (F + D + G), rounded"
    },
    "lip_across_mm": {
      "kind": "informative",
      "note": "Recommended practice; Annex A"
    },
    "lip_depth_mm": {
      "kind": "informative",
      "note": "Recommended practice; Annex A"
    },
    "groove_mm": {
      "kind": "informative",
      "from": [],
      "note": "Recommended practice; Annex A"
    },
    "screw_window": {
      "kind": "informative",
      "from": [
        "EIS-RAIL-009"
      ],
      "note": "At least one stock M3 length fits the window (EIS-RAIL-009); the throat clears the thread"
    }
  }
}