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Sizes and tolerances
1/2 in to 4 in and M12 to M100, with ±0.01 mm on the critical dimensions.
| Range | Size | Tolerance basis |
|---|---|---|
| Imperial | 1/2 in – 4 in | Thread and shank to the standard |
| Metric | M12 – M100 | Thread and shank to the standard |
| Critical dimensions | ±0.01 mm | Shank, shoulder and length under head |
| Length | To order | Cut and threaded to the drawing |
Where the ±0.01 mm applies
The tolerance is held on the dimensions that decide fit and preload — shank diameter, shoulder, and length under the head. Thread geometry follows the thread standard itself; it is not a dimension you can set independently.
Threads
| Unified | UNC / UNF per the specification |
| Metric | Coarse and fine series |
| Inspection | Thread gauges, with the result on the dimensional report |