ISO 7051 ST3.5 x 38 Tapping Screw
In stock in 7 material, grade and finish combinations.
Dimensions at ST3.5 x 38
mm · ISO 7051 · 2011 edition| Dimension | Nominal | Min | Max | |
|---|---|---|---|---|
| d | Thread size | ST3.5 | – | – |
| P | Thread pitch | 1.3 | – | – |
| l | Length | 38 | – | – |
| a | Thread runout | – | – | 2.6 |
| dk | Theoretical head diameter | 7.3 | 6.9 | 8.2 |
| k | Head height | 2.35 | – | – |
| r | Radius | – | – | 1.4 |
| Recess number | 2 | – | – | |
| m | Type H recess width (ref) | 4.4 | – | – |
| Type H penetration | – | 1.9 | 2.4 | |
| m | Type Z / socket width (ref) | 4.1 | – | – |
| Type Z penetration | – | 1.75 | 2.2 | |
| y | Point length (ref.) (C) | 3.2 | – | – |
| y | Point length (ref.) (F) | 2.5 | – | – |
| y | Point length (ref.) (R) | 2.7 | – | – |
| f | Raised head height (ref) | 0.8 | – | – |
| rf | Head radius (ref) | 8.5 | – | – |
- Length to top of countersink
- 38 mm · 36.7–39.3 mm (Type C / R), 36.7–38 mm (Type F) to ISO 7051 product grade A
- Approx. weight
- ≈ 2.12 kg per 1 000 pieces · Bare steel, before coating and packing.471 pieces per kg
- Also named
- GB/T 847