{
 "meta": {
  "title": "Thread Size Chart",
  "rows": 79,
  "formulas": {
   "H": "0.866025 x P (theoretical triangle height, 60 deg form)",
   "pitch_dia": "D - 0.649519 x P",
   "minor_dia_ext": "D - 1.226869 x P",
   "minor_dia_int": "D - 1.082532 x P",
   "tensile_area_inch": "0.7854 x (D - 0.9743/n)^2   [ASME B1.1]",
   "tensile_area_metric": "0.7854 x (D - 0.9382 x P)^2  [ISO 898-1]"
  },
  "standards": [
   "ASME B1.1 Unified Inch Screw Threads",
   "ISO 68-1 / ISO 261 / ISO 965 Metric"
  ],
  "note": "All geometry computed from the basic 60-degree thread form. No published table reproduced."
 },
 "columns": [
  "designation",
  "series",
  "nominal_in",
  "nominal_mm",
  "pitch_in",
  "pitch_mm",
  "pitch_dia_in",
  "minor_dia_internal",
  "tensile_area_sqin",
  "tensile_area_mm2"
 ],
 "rows": [
  {
   "designation": "#1-64",
   "series": "UNC",
   "nominal_in": 0.073,
   "nominal_mm": 1.854,
   "pitch_in": 0.01562,
   "pitch_mm": 0.3969,
   "pitch_dia_in": 0.06285,
   "minor_dia_internal": 0.05609,
   "tensile_area_sqin": 0.00262,
   "tensile_area_mm2": null
  },
  {
   "designation": "#2-56",
   "series": "UNC",
   "nominal_in": 0.086,
   "nominal_mm": 2.184,
   "pitch_in": 0.01786,
   "pitch_mm": 0.4536,
   "pitch_dia_in": 0.0744,
   "minor_dia_internal": 0.06667,
   "tensile_area_sqin": 0.0037,
   "tensile_area_mm2": null
  },
  {
   "designation": "#3-48",
   "series": "UNC",
   "nominal_in": 0.099,
   "nominal_mm": 2.515,
   "pitch_in": 0.02083,
   "pitch_mm": 0.5292,
   "pitch_dia_in": 0.08547,
   "minor_dia_internal": 0.07645,
   "tensile_area_sqin": 0.00486,
   "tensile_area_mm2": null
  },
  {
   "designation": "#4-40",
   "series": "UNC",
   "nominal_in": 0.112,
   "nominal_mm": 2.845,
   "pitch_in": 0.025,
   "pitch_mm": 0.635,
   "pitch_dia_in": 0.09576,
   "minor_dia_internal": 0.08494,
   "tensile_area_sqin": 0.00603,
   "tensile_area_mm2": null
  },
  {
   "designation": "#5-40",
   "series": "UNC",
   "nominal_in": 0.125,
   "nominal_mm": 3.175,
   "pitch_in": 0.025,
   "pitch_mm": 0.635,
   "pitch_dia_in": 0.10876,
   "minor_dia_internal": 0.09794,
   "tensile_area_sqin": 0.00796,
   "tensile_area_mm2": null
  },
  {
   "designation": "#6-32",
   "series": "UNC",
   "nominal_in": 0.138,
   "nominal_mm": 3.505,
   "pitch_in": 0.03125,
   "pitch_mm": 0.7937,
   "pitch_dia_in": 0.1177,
   "minor_dia_internal": 0.10417,
   "tensile_area_sqin": 0.00909,
   "tensile_area_mm2": null
  },
  {
   "designation": "#8-32",
   "series": "UNC",
   "nominal_in": 0.164,
   "nominal_mm": 4.166,
   "pitch_in": 0.03125,
   "pitch_mm": 0.7937,
   "pitch_dia_in": 0.1437,
   "minor_dia_internal": 0.13017,
   "tensile_area_sqin": 0.01401,
   "tensile_area_mm2": null
  },
  {
   "designation": "#10-24",
   "series": "UNC",
   "nominal_in": 0.19,
   "nominal_mm": 4.826,
   "pitch_in": 0.04167,
   "pitch_mm": 1.0583,
   "pitch_dia_in": 0.16294,
   "minor_dia_internal": 0.14489,
   "tensile_area_sqin": 0.01753,
   "tensile_area_mm2": null
  },
  {
   "designation": "#12-24",
   "series": "UNC",
   "nominal_in": 0.216,
   "nominal_mm": 5.486,
   "pitch_in": 0.04167,
   "pitch_mm": 1.0583,
   "pitch_dia_in": 0.18894,
   "minor_dia_internal": 0.17089,
   "tensile_area_sqin": 0.02416,
   "tensile_area_mm2": null
  },
  {
   "designation": "1/4-20",
   "series": "UNC",
   "nominal_in": 0.25,
   "nominal_mm": 6.35,
   "pitch_in": 0.05,
   "pitch_mm": 1.27,
   "pitch_dia_in": 0.21752,
   "minor_dia_internal": 0.19587,
   "tensile_area_sqin": 0.03182,
   "tensile_area_mm2": null
  },
  {
   "designation": "5/16-18",
   "series": "UNC",
   "nominal_in": 0.3125,
   "nominal_mm": 7.938,
   "pitch_in": 0.05556,
   "pitch_mm": 1.4111,
   "pitch_dia_in": 0.27642,
   "minor_dia_internal": 0.25236,
   "tensile_area_sqin": 0.05243,
   "tensile_area_mm2": null
  },
  {
   "designation": "3/8-16",
   "series": "UNC",
   "nominal_in": 0.375,
   "nominal_mm": 9.525,
   "pitch_in": 0.0625,
   "pitch_mm": 1.5875,
   "pitch_dia_in": 0.33441,
   "minor_dia_internal": 0.30734,
   "tensile_area_sqin": 0.07749,
   "tensile_area_mm2": null
  },
  {
   "designation": "7/16-14",
   "series": "UNC",
   "nominal_in": 0.4375,
   "nominal_mm": 11.112,
   "pitch_in": 0.07143,
   "pitch_mm": 1.8143,
   "pitch_dia_in": 0.39111,
   "minor_dia_internal": 0.36018,
   "tensile_area_sqin": 0.10631,
   "tensile_area_mm2": null
  },
  {
   "designation": "1/2-13",
   "series": "UNC",
   "nominal_in": 0.5,
   "nominal_mm": 12.7,
   "pitch_in": 0.07692,
   "pitch_mm": 1.9538,
   "pitch_dia_in": 0.45004,
   "minor_dia_internal": 0.41673,
   "tensile_area_sqin": 0.1419,
   "tensile_area_mm2": null
  },
  {
   "designation": "9/16-12",
   "series": "UNC",
   "nominal_in": 0.5625,
   "nominal_mm": 14.287,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 0.50837,
   "minor_dia_internal": 0.47229,
   "tensile_area_sqin": 0.18194,
   "tensile_area_mm2": null
  },
  {
   "designation": "5/8-11",
   "series": "UNC",
   "nominal_in": 0.625,
   "nominal_mm": 15.875,
   "pitch_in": 0.09091,
   "pitch_mm": 2.3091,
   "pitch_dia_in": 0.56595,
   "minor_dia_internal": 0.52659,
   "tensile_area_sqin": 0.226,
   "tensile_area_mm2": null
  },
  {
   "designation": "3/4-10",
   "series": "UNC",
   "nominal_in": 0.75,
   "nominal_mm": 19.05,
   "pitch_in": 0.1,
   "pitch_mm": 2.54,
   "pitch_dia_in": 0.68505,
   "minor_dia_internal": 0.64175,
   "tensile_area_sqin": 0.33446,
   "tensile_area_mm2": null
  },
  {
   "designation": "7/8-9",
   "series": "UNC",
   "nominal_in": 0.875,
   "nominal_mm": 22.225,
   "pitch_in": 0.11111,
   "pitch_mm": 2.8222,
   "pitch_dia_in": 0.80283,
   "minor_dia_internal": 0.75472,
   "tensile_area_sqin": 0.46173,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-8",
   "series": "UNC",
   "nominal_in": 1.0,
   "nominal_mm": 25.4,
   "pitch_in": 0.125,
   "pitch_mm": 3.175,
   "pitch_dia_in": 0.91881,
   "minor_dia_internal": 0.86468,
   "tensile_area_sqin": 0.60575,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/8-7",
   "series": "UNC",
   "nominal_in": 1.125,
   "nominal_mm": 28.575,
   "pitch_in": 0.14286,
   "pitch_mm": 3.6286,
   "pitch_dia_in": 1.03221,
   "minor_dia_internal": 0.97035,
   "tensile_area_sqin": 0.76328,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/4-7",
   "series": "UNC",
   "nominal_in": 1.25,
   "nominal_mm": 31.75,
   "pitch_in": 0.14286,
   "pitch_mm": 3.6286,
   "pitch_dia_in": 1.15721,
   "minor_dia_internal": 1.09535,
   "tensile_area_sqin": 0.96911,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-3/8-6",
   "series": "UNC",
   "nominal_in": 1.375,
   "nominal_mm": 34.925,
   "pitch_in": 0.16667,
   "pitch_mm": 4.2333,
   "pitch_dia_in": 1.26675,
   "minor_dia_internal": 1.19458,
   "tensile_area_sqin": 1.15488,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/2-6",
   "series": "UNC",
   "nominal_in": 1.5,
   "nominal_mm": 38.1,
   "pitch_in": 0.16667,
   "pitch_mm": 4.2333,
   "pitch_dia_in": 1.39175,
   "minor_dia_internal": 1.31958,
   "tensile_area_sqin": 1.40525,
   "tensile_area_mm2": null
  },
  {
   "designation": "#0-80",
   "series": "UNF",
   "nominal_in": 0.06,
   "nominal_mm": 1.524,
   "pitch_in": 0.0125,
   "pitch_mm": 0.3175,
   "pitch_dia_in": 0.05188,
   "minor_dia_internal": 0.04647,
   "tensile_area_sqin": 0.0018,
   "tensile_area_mm2": null
  },
  {
   "designation": "#1-72",
   "series": "UNF",
   "nominal_in": 0.073,
   "nominal_mm": 1.854,
   "pitch_in": 0.01389,
   "pitch_mm": 0.3528,
   "pitch_dia_in": 0.06398,
   "minor_dia_internal": 0.05796,
   "tensile_area_sqin": 0.00278,
   "tensile_area_mm2": null
  },
  {
   "designation": "#2-64",
   "series": "UNF",
   "nominal_in": 0.086,
   "nominal_mm": 2.184,
   "pitch_in": 0.01562,
   "pitch_mm": 0.3969,
   "pitch_dia_in": 0.07585,
   "minor_dia_internal": 0.06909,
   "tensile_area_sqin": 0.00393,
   "tensile_area_mm2": null
  },
  {
   "designation": "#3-56",
   "series": "UNF",
   "nominal_in": 0.099,
   "nominal_mm": 2.515,
   "pitch_in": 0.01786,
   "pitch_mm": 0.4536,
   "pitch_dia_in": 0.0874,
   "minor_dia_internal": 0.07967,
   "tensile_area_sqin": 0.00523,
   "tensile_area_mm2": null
  },
  {
   "designation": "#4-48",
   "series": "UNF",
   "nominal_in": 0.112,
   "nominal_mm": 2.845,
   "pitch_in": 0.02083,
   "pitch_mm": 0.5292,
   "pitch_dia_in": 0.09847,
   "minor_dia_internal": 0.08945,
   "tensile_area_sqin": 0.0066,
   "tensile_area_mm2": null
  },
  {
   "designation": "#5-44",
   "series": "UNF",
   "nominal_in": 0.125,
   "nominal_mm": 3.175,
   "pitch_in": 0.02273,
   "pitch_mm": 0.5773,
   "pitch_dia_in": 0.11024,
   "minor_dia_internal": 0.1004,
   "tensile_area_sqin": 0.00831,
   "tensile_area_mm2": null
  },
  {
   "designation": "#6-40",
   "series": "UNF",
   "nominal_in": 0.138,
   "nominal_mm": 3.505,
   "pitch_in": 0.025,
   "pitch_mm": 0.635,
   "pitch_dia_in": 0.12176,
   "minor_dia_internal": 0.11094,
   "tensile_area_sqin": 0.01014,
   "tensile_area_mm2": null
  },
  {
   "designation": "#8-36",
   "series": "UNF",
   "nominal_in": 0.164,
   "nominal_mm": 4.166,
   "pitch_in": 0.02778,
   "pitch_mm": 0.7056,
   "pitch_dia_in": 0.14596,
   "minor_dia_internal": 0.13393,
   "tensile_area_sqin": 0.01473,
   "tensile_area_mm2": null
  },
  {
   "designation": "#10-32",
   "series": "UNF",
   "nominal_in": 0.19,
   "nominal_mm": 4.826,
   "pitch_in": 0.03125,
   "pitch_mm": 0.7937,
   "pitch_dia_in": 0.1697,
   "minor_dia_internal": 0.15617,
   "tensile_area_sqin": 0.01999,
   "tensile_area_mm2": null
  },
  {
   "designation": "#12-28",
   "series": "UNF",
   "nominal_in": 0.216,
   "nominal_mm": 5.486,
   "pitch_in": 0.03571,
   "pitch_mm": 0.9071,
   "pitch_dia_in": 0.1928,
   "minor_dia_internal": 0.17734,
   "tensile_area_sqin": 0.02579,
   "tensile_area_mm2": null
  },
  {
   "designation": "1/4-28",
   "series": "UNF",
   "nominal_in": 0.25,
   "nominal_mm": 6.35,
   "pitch_in": 0.03571,
   "pitch_mm": 0.9071,
   "pitch_dia_in": 0.2268,
   "minor_dia_internal": 0.21134,
   "tensile_area_sqin": 0.03637,
   "tensile_area_mm2": null
  },
  {
   "designation": "5/16-24",
   "series": "UNF",
   "nominal_in": 0.3125,
   "nominal_mm": 7.938,
   "pitch_in": 0.04167,
   "pitch_mm": 1.0583,
   "pitch_dia_in": 0.28544,
   "minor_dia_internal": 0.26739,
   "tensile_area_sqin": 0.05807,
   "tensile_area_mm2": null
  },
  {
   "designation": "3/8-24",
   "series": "UNF",
   "nominal_in": 0.375,
   "nominal_mm": 9.525,
   "pitch_in": 0.04167,
   "pitch_mm": 1.0583,
   "pitch_dia_in": 0.34794,
   "minor_dia_internal": 0.32989,
   "tensile_area_sqin": 0.08783,
   "tensile_area_mm2": null
  },
  {
   "designation": "7/16-20",
   "series": "UNF",
   "nominal_in": 0.4375,
   "nominal_mm": 11.112,
   "pitch_in": 0.05,
   "pitch_mm": 1.27,
   "pitch_dia_in": 0.40502,
   "minor_dia_internal": 0.38337,
   "tensile_area_sqin": 0.11872,
   "tensile_area_mm2": null
  },
  {
   "designation": "1/2-20",
   "series": "UNF",
   "nominal_in": 0.5,
   "nominal_mm": 12.7,
   "pitch_in": 0.05,
   "pitch_mm": 1.27,
   "pitch_dia_in": 0.46752,
   "minor_dia_internal": 0.44587,
   "tensile_area_sqin": 0.15995,
   "tensile_area_mm2": null
  },
  {
   "designation": "9/16-18",
   "series": "UNF",
   "nominal_in": 0.5625,
   "nominal_mm": 14.287,
   "pitch_in": 0.05556,
   "pitch_mm": 1.4111,
   "pitch_dia_in": 0.52642,
   "minor_dia_internal": 0.50236,
   "tensile_area_sqin": 0.20298,
   "tensile_area_mm2": null
  },
  {
   "designation": "5/8-18",
   "series": "UNF",
   "nominal_in": 0.625,
   "nominal_mm": 15.875,
   "pitch_in": 0.05556,
   "pitch_mm": 1.4111,
   "pitch_dia_in": 0.58892,
   "minor_dia_internal": 0.56486,
   "tensile_area_sqin": 0.25596,
   "tensile_area_mm2": null
  },
  {
   "designation": "3/4-16",
   "series": "UNF",
   "nominal_in": 0.75,
   "nominal_mm": 19.05,
   "pitch_in": 0.0625,
   "pitch_mm": 1.5875,
   "pitch_dia_in": 0.70941,
   "minor_dia_internal": 0.68234,
   "tensile_area_sqin": 0.37296,
   "tensile_area_mm2": null
  },
  {
   "designation": "7/8-14",
   "series": "UNF",
   "nominal_in": 0.875,
   "nominal_mm": 22.225,
   "pitch_in": 0.07143,
   "pitch_mm": 1.8143,
   "pitch_dia_in": 0.82861,
   "minor_dia_internal": 0.79768,
   "tensile_area_sqin": 0.50947,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-12",
   "series": "UNF",
   "nominal_in": 1.0,
   "nominal_mm": 25.4,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 0.94587,
   "minor_dia_internal": 0.90979,
   "tensile_area_sqin": 0.66304,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/8-12",
   "series": "UNF",
   "nominal_in": 1.125,
   "nominal_mm": 28.575,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 1.07087,
   "minor_dia_internal": 1.03479,
   "tensile_area_sqin": 0.85572,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/4-12",
   "series": "UNF",
   "nominal_in": 1.25,
   "nominal_mm": 31.75,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 1.19587,
   "minor_dia_internal": 1.15979,
   "tensile_area_sqin": 1.07295,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-3/8-12",
   "series": "UNF",
   "nominal_in": 1.375,
   "nominal_mm": 34.925,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 1.32087,
   "minor_dia_internal": 1.28479,
   "tensile_area_sqin": 1.31471,
   "tensile_area_mm2": null
  },
  {
   "designation": "1-1/2-12",
   "series": "UNF",
   "nominal_in": 1.5,
   "nominal_mm": 38.1,
   "pitch_in": 0.08333,
   "pitch_mm": 2.1167,
   "pitch_dia_in": 1.44587,
   "minor_dia_internal": 1.40979,
   "tensile_area_sqin": 1.58102,
   "tensile_area_mm2": null
  },
  {
   "designation": "M1.6\u00d70.35",
   "series": "Metric Coarse",
   "nominal_in": 0.063,
   "nominal_mm": 1.6,
   "pitch_in": 0.01378,
   "pitch_mm": 0.35,
   "pitch_dia_in": 0.054,
   "minor_dia_internal": 1.22111,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 1.27
  },
  {
   "designation": "M2\u00d70.4",
   "series": "Metric Coarse",
   "nominal_in": 0.0787,
   "nominal_mm": 2,
   "pitch_in": 0.01575,
   "pitch_mm": 0.4,
   "pitch_dia_in": 0.0685,
   "minor_dia_internal": 1.56699,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 2.073
  },
  {
   "designation": "M2.5\u00d70.45",
   "series": "Metric Coarse",
   "nominal_in": 0.0984,
   "nominal_mm": 2.5,
   "pitch_in": 0.01772,
   "pitch_mm": 0.45,
   "pitch_dia_in": 0.0869,
   "minor_dia_internal": 2.01286,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 3.391
  },
  {
   "designation": "M3\u00d70.5",
   "series": "Metric Coarse",
   "nominal_in": 0.1181,
   "nominal_mm": 3,
   "pitch_in": 0.01969,
   "pitch_mm": 0.5,
   "pitch_dia_in": 0.1053,
   "minor_dia_internal": 2.45873,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 5.031
  },
  {
   "designation": "M3.5\u00d70.6",
   "series": "Metric Coarse",
   "nominal_in": 0.1378,
   "nominal_mm": 3.5,
   "pitch_in": 0.02362,
   "pitch_mm": 0.6,
   "pitch_dia_in": 0.1225,
   "minor_dia_internal": 2.85048,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 6.775
  },
  {
   "designation": "M4\u00d70.7",
   "series": "Metric Coarse",
   "nominal_in": 0.1575,
   "nominal_mm": 4,
   "pitch_in": 0.02756,
   "pitch_mm": 0.7,
   "pitch_dia_in": 0.1396,
   "minor_dia_internal": 3.24223,
   "tensile_area_sqin": null,
   "tensile_area_mm2": 8.779
  },
  {
   "designation": "M5\u00d70.8",
   "series": "Metric Coarse",
   "nominal_in": 0.1969,
   "nominal_mm": 5,
   "pitch_in": 0.0315,
   "pitch_mm": 0.8,
   "pitch_dia_in": 0.1764,
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}