ISO 1483 ST4.8 x 25 Slotted Raised CSK Screw
In stock in 5 material, grade and finish combinations.
Dimensions at ST4.8 x 25
mm · ISO 1483 · 2011 edition| Dimension | Nominal | Min | Max | GB/T 5284 | |
|---|---|---|---|---|---|
| d | Thread size | ST4.8 | – | – | ST4.8 |
| P | Thread pitch | 1.6 | – | – | 1.6 |
| l | Length | 25 | – | – | 25 |
| a | Thread runout | – | – | 1.6 | 1.6 |
| dk | Head diameter | 9.3 | 8.9 | – | 8.9 |
| k | Head height | 2.8 | – | – | 2.8 |
| f | Raised head height (ref) | 1.2 | – | – | 1.2 |
| n | Slot width (nominal) | 1.2 | – | – | 1.2 |
| n | Slot width | – | 1.26 | 1.51 | 1.26–1.51 |
| t | Slot depth | – | 2 | 2.4 | 2–2.4 |
| r | Radius | – | – | 2 | 2 |
| y | Point length (ref.) (C) | 4.3 | – | – | 4.3 |
| y | Point length (ref.) (F) | 3.2 | – | – | 3.2 |
| y | Point length (ref.) (R) | 3.6 | – | – | 3.6 |
- GB/T 5284
- Values in bold differ from ISO 1483.
- Length to top of countersink
- 25 mm · 24.2–25.8 mm (Type C / R), 23.7–25 mm (Type F) to ISO 1483 product grade A
- Approx. weight
- ≈ 3.15 kg per 1 000 pieces · Bare steel, before coating and packing.317 pieces per kg
- Also named
- GB/T 5284