DINReplaced → ISO 7049Draft · single source
DIN 7981 C
Cross recessed pan head tapping screws — Form C — with tip
- Head · drive
- Pan head · Cross recess type H (Phillips)
- Thread
- Tapping screw thread (ISO 1478)
- Tolerance
- thread ISO 1478
- Property classes
- A2
- Materials
- SteelStainless
Replaced by
ISO 7049Current · Draft
Dimensions
mm · values as the standard states them| Size | P | dk | m | m | k | a | r | t | t | recess_no | rf | y | y |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ST2.2 | 4.2 3.9 – 4.2 | ≈ 2.6 | ≈ 2.4 | 1.8 1.55 – 1.8 | ≤ 0.8 | ≤ 0.3 | 0.86 – 1.32 | 1.1 – 1.35 | 1 | ≈ 3.4 | ≤ 2 | ≤ 1.6 | |
| ST2.9 | 5.6 5.3 – 5.6 | ≈ 3 | ≈ 2.9 | 2.2 1.95 – 2.2 | ≤ 1.1 | ≤ 0.4 | 1.35 – 1.8 | 1.58 – 1.83 | 1 | ≈ 4.4 | ≤ 2.6 | ≤ 2.1 | |
| ST3.5 | 6.9 6.54 – 6.9 | ≈ 4.2 | ≈ 3.9 | 2.6 2.35 – 2.6 | ≤ 1.3 | ≤ 0.5 | 1.4 – 2.03 | 1.47 – 1.93 | 2 | ≈ 5.4 | ≤ 3.2 | ≤ 2.5 | |
| (ST3.9) | 7.5 7.14 – 7.5 | ≈ 4.4 | ≈ 4.1 | 2.8 2.55 – 2.8 | ≤ 1.3 | ≤ 0.5 | 1.63 – 2.26 | 1.7 – 2.16 | 2 | ≈ 5.8 | ≤ 3.5 | ≤ 2.7 | |
| ST4.2 | 8.2 7.84 – 8.2 | ≈ 4.6 | ≈ 4.3 | 3.05 2.75 – 3.05 | ≤ 1.4 | ≤ 0.6 | 1.8 – 2.46 | 1.88 – 2.34 | 2 | ≈ 6.2 | ≤ 3.7 | ≤ 2.8 | |
| ST4.8 | 9.5 9.14 – 9.5 | ≈ 5 | ≈ 4.7 | 3.55 3.25 – 3.55 | ≤ 1.6 | ≤ 0.7 | 2.26 – 2.87 | 2.28 – 2.74 | 2 | ≈ 7.2 | ≤ 4.3 | ≤ 3.2 | |
| ST5.5 | 10.8 10.37 – 10.8 | ≈ 6.5 | ≈ 6.2 | 3.95 3.65 – 3.95 | ≤ 1.8 | ≤ 0.8 | 2.49 – 3.15 | 2.51 – 2.97 | 3 | ≈ 8.2 | ≤ 5 | ≤ 3.6 | |
| ST6.3 | 12.5 12.07 – 12.5 | ≈ 7.1 | ≈ 6.7 | 4.55 4.25 – 4.55 | ≤ 1.8 | ≤ 0.9 | 3 – 3.66 | 3.02 – 3.48 | 3 | ≈ 9.5 | ≤ 6 | ≤ 3.6 |
Ranges read min – max; ≤ / ≥ where the standard gives one limit, ≈ for approximate values. Sizes in (brackets) are non-preferred. Select a row for its size sheet.
Length tolerances
4.53.7 – 5.3
6.55.7 – 7.3
9.58.7 – 10.3
1312.2 – 13.8
1615.2 – 16.8
1918.2 – 19.8
2221.2 – 22.8
2524.2 – 25.8
3230.7 – 33.3
3836.7 – 39.3