ISO 15483 ST4.2 x 25 Raised CSK Drill Screw
In stock in 7 material, grade and finish combinations.
Dimensions at ST4.2 x 25
mm · ISO 15483 · 1999 edition| Dimension | Nominal | Min | Max | DIN 7504 R | GB/T 15856.3 | |
|---|---|---|---|---|---|---|
| d | Thread size | ST4.2 | – | – | ST4.2 | ST4.2 |
| P | Thread pitch | 1.4 | – | – | 1.4 | 1.4 |
| l | Length | 25 | – | – | 25 | 25 |
| a | Thread runout | – | – | 1.4 | — | 1.4 |
| dk | Theoretical head diameter | 8.4 | 8 | 9.4 | — | 8–9.4 |
| k | Head height | 2.6 | – | – | — | 2.6 |
| r | Radius | – | – | 1.6 | — | 1.6 |
| Recess number | 2 | – | – | — | 2 | |
| m | Type H recess width (ref) | 5.2 | – | – | — | 5.2 |
| Type H penetration | – | 2.7 | 3.2 | — | 2.7–3.2 | |
| m | Type Z / socket width (ref) | 5.2 | – | – | — | 5.2 |
| Type Z penetration | – | 2.65 | 3.1 | — | 2.65–3.1 | |
| Drilling capacity | – | 1.75 | 3 | 1.75–3 | 1.75–3 | |
| f | Raised head height (ref) | 1 | – | – | — | 1 |
| rf | Head radius (ref) | 9.5 | – | – | — | 9.5 |
- 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
- ≈ 2.38 kg per 1 000 pieces · Bare steel, before coating and packing.421 pieces per kg
- Also named
- GB/T 15856.3