ISO 4028 Set Screw (Dog Point)
ISO 4028 Dog Point Set Screws
DIN Equivalent: DIN 915 | Hex Socket Headless Screws
ISO 4028 dog point set screws feature a cylindrical pilot extension that fits into a mating hole, slot, or keyway. The dog point provides positive mechanical location and prevents rotation without marking the shaft surface, making it ideal for precision positioning applications.
Quick Specifications
Key Features
Positive Location
Cylindrical pilot fits into drilled holes or keyways for precise, repeatable positioning. Eliminates guesswork in assembly.
Non-Marring
Cylindrical point doesn't damage or indent the shaft. Ideal when parts need to be repositioned or serviced.
Rotation Prevention
Dog point engages slot or hole to mechanically prevent rotation. More secure than friction-based set screws.
Precision Ground
Dog diameter held to close tolerances for proper fit in mating features. Available in full dog and half dog lengths.
Dimension Chart
| Size | Pitch | Dog Dia. (dp) | Dog Length | Hex Key Size |
|---|---|---|---|---|
| M3 | 0.5 mm | 1.5 mm | 1.5 mm | 1.5 mm |
| M4 | 0.7 mm | 2.0 mm | 2.0 mm | 2 mm |
| M5 | 0.8 mm | 2.5 mm | 2.5 mm | 2.5 mm |
| M6 | 1.0 mm | 3.0 mm | 3.0 mm | 3 mm |
| M8 | 1.25 mm | 4.0 mm | 4.0 mm | 4 mm |
| M10 | 1.5 mm | 5.0 mm | 5.0 mm | 5 mm |
| M12 | 1.75 mm | 6.0 mm | 6.0 mm | 6 mm |
Full Dog vs Half Dog
Full Dog Point
- Dog length ≈ thread diameter
- Deeper engagement in hole/slot
- Higher shear strength
- Better for heavy loads
Half Dog Point
- Dog length ≈ 0.5× diameter
- Shallower hole required
- Easier to machine mating feature
- Good for light-duty applications
Common Applications
Shop ISO 4028 Dog Point Set Screws
DIN 915 equivalent. Available in alloy steel and stainless.
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