# Machining & Fasteners Calc – ISO Metric Thread Geometry

> Machining & Fasteners Calc – ISO Metric Thread Geometry is a paid API for AI agents from machining-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Calculates ISO metric thread dimensions including pitch diameter, minor diameters (internal and external), thread height, and tensile stress area from a nominal diameter and pitch.

## Facts

- Endpoint: GET https://machining-calc.x402tookit.com/thread-geometry?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/machining-fasteners-calc-iso-metric-thread-geometry-e8e22988
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IkBc6usKwQSzlSkpEhdG4

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability machining-fasteners-calc-iso-metric-thread-geometry-e8e22988
```

Example prompt: What are the full ISO metric thread geometry dimensions — pitch diameter, minor diameters, thread height, and tensile stress area — for an M10 bolt with a 1.5 mm pitch?

## When to prefer this

Use this endpoint when you need precise ISO metric thread geometry values (pitch diameter, minor diameters, thread height, tensile stress area) for a known nominal diameter and pitch combination. Prefer it over general engineering references when you need machine-readable numeric outputs for downstream calculations such as bolt preload, stress analysis, or gauge tolerance work. It complements the sibling bolt preload endpoint on the same service.

## Known failure modes

- Missing required query parameters (diameter or pitch) returns an error
- Diameter outside the 1–100 mm range may return a validation error or null values
- Pitch value inconsistent with standard ISO series may still compute but may not match any standard thread
- Degraded flag set to true if computed values are approximate or source data is unavailable
- Network or payment failure returns no result and no charge is applied

## How this service works

ISO metric thread dimensions: pitch diameter, minor diameters, thread height and tensile stress area.

## Output

Returns a JSON object containing the nominal diameter and pitch as entered, plus computed values: pitch diameter (mm), external minor diameter (mm), internal minor diameter (mm), thread height H (mm), and tensile stress area (mm²), along with metadata fields such as source, timestamp, and any warnings or disclaimers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "diameter",
      "pitch"
     ],
     "properties": {
      "pitch": {
       "type": "number",
       "description": "Thread pitch in mm (for example 1.5 for M10 coarse)"
      },
      "diameter": {
       "type": "number",
       "description": "Nominal major diameter in mm, 1 to 100"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "pitchMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "diameterMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "stressAreaMm2": {
       "type": [
        "null",
        "number"
       ]
      },
      "pitchDiameterMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "threadHeightHMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "minorDiameterExternalMm": {
       "type": [
        "null",
        "number"
       ]
      },
      "minorDiameterInternalMm": {
       "type": [
        "null",
        "number"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/machining-fasteners-calc-iso-metric-thread-geometry-e8e22988/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from machining-calc.x402tookit.com](https://www.zero.xyz/host/machining-calc.x402tookit.com/llms.txt)