Tolerances & Fits
ISO Fits (Hole/Shaft) Reference
Common hole-basis fit designations used in mechanical design, and the type of assembly each is typically chosen for. Exact tolerance limits in micrometres depend on the nominal size range and are defined in ISO 286-2 — consult the full standard for precise values on a specific job.
| Designation | Fit Type | Typical Use |
|---|---|---|
| H7/g6 | Clearance — sliding fit | Precision sliding parts, spindles in bushings |
| H7/h6 | Clearance — locational | Easily assembled/disassembled locating parts |
| H7/k6 | Transition | Location fits with light press, keyed parts |
| H7/n6 | Transition — tight | Semi-permanent assemblies |
| H7/p6 | Interference — light press | Press-fit bushings and pins |
| H7/s6 | Interference — medium press | Permanent assemblies, shrink-fit-like joints |
Reference values only. Verify against the current governing standard (e.g. ISO, ANSI, ASME, DIN) before using in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.
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