ISO 15483 ST5.5 x 25 Raised CSK Drill Screw
In stock in 7 material, grade and finish combinations.
Dimensions at ST5.5 x 25
mm · ISO 15483 · 1999 edition| Dimension | Nominal | Min | Max | DIN 7504 R | GB/T 15856.3 | |
|---|---|---|---|---|---|---|
| d | Thread size | ST5.5 | – | – | ST5.5 | ST5.5 |
| P | Thread pitch | 1.8 | – | – | 1.8 | 1.8 |
| l | Length | 25 | – | – | 25 | 25 |
| a | Thread runout | – | – | 1.8 | — | 1.8 |
| dk | Theoretical head diameter | 10.3 | 9.9 | 11.5 | — | 9.9–11.5 |
| k | Head height | 3 | – | – | — | 3 |
| r | Radius | – | – | 2.2 | — | 2.2 |
| Recess number | 3 | – | – | — | 3 | |
| m | Type H recess width (ref) | 6.7 | – | – | — | 6.7 |
| Type H penetration | – | 2.95 | 3.45 | — | 2.95–3.45 | |
| m | Type Z / socket width (ref) | 6.6 | – | – | — | 6.6 |
| Type Z penetration | – | 2.95 | 3.4 | — | 2.95–3.4 | |
| Drilling capacity | – | 1.75 | 5.25 | 1.75–5.25 | 1.75–5.25 | |
| f | Raised head height (ref) | 1.3 | – | – | — | 1.3 |
| rf | Head radius (ref) | 11 | – | – | — | 11 |
- DIN 7504 R, GB/T 15856.3
- Values in bold differ from ISO 15483.
- Length to top of countersink
- 25 mm · 24–26 mm to ISO 15483
- Approx. weight
- ≈ 4.17 kg per 1 000 pieces · Bare steel, before coating and packing.240 pieces per kg
- Also named
- GB/T 15856.3