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Machining & Fasteners Calc – Tap Drill Size Lookup
x402
Machining & Fasteners Calc – Tap Drill Size Lookup is a paid API for AI agents from machining-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Returns the recommended tap drill size (metric and inch) for a specified thread, along with formula verification and thread dimensional data.
Price / call$0.02
Success—
StatusUnknown
How this service works
Tap drill size for metric coarse (M3 to M24) and common inch threads (#4-40 to 1/2-20), with the formula check.
Output
Returns the thread name, pitch in mm, major diameter in mm, recommended tap drill size in both mm and inches, the formula-derived drill diameter for cross-check, a verdict on whether the standard drill matches the formula, a plain-language summary, and optional warnings or disclaimer text. May include a 'degraded' flag if data is partially unavailable.
Example use cases
CNC shop tap drill selection
“I'm setting up a tapping operation for M6 metric coarse holes — what's the correct tap drill size in mm and does it match the standard formula?”
Imperial thread hole prep
“What drill bit size do I need to pre-drill before tapping a 1/4-20 thread? Give me the size in both inches and mm.”
Engineering drawing verification
“I have a drawing that specifies a #10-32 tapped hole — can you confirm the correct tap drill size and verify the formula calculation?”
Technical details
Endpoint
GEThttps://machining-calc.x402tookit.com/tap-drill?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, formula-verified tap drill size lookup for standard metric coarse (M3–M24) or common inch threads (#4-40 to 1/2-20). It is ideal for CNC programming, manual machining setup, and engineering verification workflows where you want both the recommended drill size and a formula cross-check in a single call. Prefer it over generic reference tables when you need machine-readable output with units in both mm and inches.
Side effects
- Unsupported thread designation returns an error or null fields — only M3–M24 metric coarse and listed inch sizes (#4-40 to 1/2-20) are supported
- Malformed thread string (e.g. typos, wrong format) may result in a null response or degraded output
- Missing 'thread' query parameter causes a validation error
- Extremely unusual thread designations outside the supported list are not covered
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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