ISO 10509 ST8 x 38 Flange Head Tapping Screw
In stock in 4 material, grade and finish combinations.
Dimensions at ST8 x 38
mm · ISO 10509 · 2012 edition| Dimension | Nominal | Min | Max | |
|---|---|---|---|---|
| d | Thread size | ST8 | – | – |
| P | Thread pitch | 2.1 | – | – |
| l | Length | 38 | – | – |
| a | Thread runout | – | – | 2.1 |
| da | Underhead diameter | – | – | 9.2 |
| dc | Flange diameter | 16.8 | – | – |
| dc | Bearing diameter | – | 15.5 | – |
| c | Washer height | – | 1.2 | – |
| s | Width across flats | – | 9.78 | 10 |
| e | Width across corners | – | 10.89 | – |
| k | Head height | 8.6 | – | – |
| kw | Wrenching height | – | 3.7 | – |
| r | Radius | – | 0.4 | – |
| r2 | Radius r2 | – | – | 0.5 |
| y | Point length (ref.) (C) | 7.5 | – | – |
| y | Point length (ref.) (F) | 4.2 | – | – |
| y | Point length (ref.) (R) | 6.3 | – | – |
- Length under head
- 38 mm · 36.7–39.3 mm to ISO 10509 product grade A
- Approx. weight
- ≈ 16.07 kg per 1 000 pieces · Bare steel, before coating and packing.62.2 pieces per kg
- Also named
- GB/T 16824.2