Thread tensile-stress area API

Computes the ISO/UTS tensile-stress area, minor (root) area and nominal area from major diameter and pitch, plus proof and yield loads. Answers 'What is the tensile-stress area of an M12x1.75 bolt?', 'What axial load brings it to proof?'.

Price$0.04per request

MethodPOST

Route/v1/engineering/thread-stress-area

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

fastenerthreadtensile-stress-areaboltproof-loadiso-898pitchmachine-design

API URLhttps://x402.hexl.dev/v1/engineering/thread-stress-area

Integration docs

Example request

{
  "majorDiameterMm": 12,
  "pitchMm": 1.75,
  "proofStrengthMpa": 600
}

Example response

{
  "tensileStressAreaMm2": 84.2665,
  "minorRootAreaMm2": 76.2474,
  "nominalAreaMm2": 113.0973,
  "stressDiameterMm": 10.3582,
  "minorDiameterMm": 9.853,
  "formula": "At = (π/4)·(d − 0.938194·p)²",
  "interpretation": "Use the tensile-stress area (not nominal) for axial bolt stress; root area governs shear.",
  "proofLoadN": 50559.923
}

Input schema

{
  "type": "object",
  "required": [
    "majorDiameterMm",
    "pitchMm"
  ],
  "properties": {
    "majorDiameterMm": {
      "type": "number",
      "examples": [
        12
      ]
    },
    "pitchMm": {
      "type": "number",
      "examples": [
        1.75
      ]
    },
    "proofStrengthMpa": {
      "type": "number",
      "examples": [
        600
      ]
    },
    "yieldStrengthMpa": {
      "type": "number",
      "examples": [
        660
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}