EI
Tap - Tolerances
Legend
Pitch diameter tolerance of internal thread acc. DIN ISO 965-1
Taps with specific pitch diameter tolerance
Pitch diameter tolerance of the tap acc. DIN EN 22857
Pitch diameter tolerance of the no-go thread plug gauge acc. DIN ISO 1502
Pitch diameter tolerance of the go thread plug gauge acc. DIN ISO 1502
Basis
t
Tolerance class 5 of the internal thread (tol. unit)
TD2
Pitch diameter tolerance
| Tolerance class of tap | tolerance field internal thread | Remarks | Applications | |||||
|---|---|---|---|---|---|---|---|---|
| 4H (DIN 802/1) | ISO 1 | 4H | 5H | Undersize | Threaded connections with little play | |||
| 6H (DIN 802/1) | ISO 2 | 4G | 5G | 6H | Normal | Normal threaded connection | ||
| 6G (DIN 802/1) | ISO 3 | 6G | 7H | 8H | Oversize | Threaded connections with a lot of play | ||
| 7G (DIN 802/4) | 7G | 8G | Oversize | before heat treatment leading to distortion | ||||
| 6H +0,1 | Oversize | galvanic surface treatment w. Layer thickness ≈ 25μm | ||||||
| 6H +0,2 | Oversize | galvanic surface treatment w. Layer thickness ≈ 50μm | ||||||