DIN 916 Set Screw (Cup Point) Specifications
DIN 916 Set Screws – Cup Point
ISO Equivalent: ISO 4029 | Hex Socket Cup Point Grub Screws
DIN 916 defines hex socket set screws with a cup point — the most versatile and widely used set screw type. The circular cutting edge provides excellent holding power while minimizing shaft damage, making it ideal for general-purpose clamping applications.
Quick Specifications
Key Features
Cup Point Design
Circular cutting edge provides excellent grip with controlled penetration. Creates a ring-shaped witness mark for repositioning.
Balanced Performance
Best combination of holding power and shaft preservation. Strong grip without excessive damage.
Most Versatile
General-purpose point type suitable for the widest range of applications. The default choice when unsure which point to specify.
Self-Centering
Cup naturally centers on shaft surface. Ring mark allows return to same position after adjustment.
Dimension Chart
| Size | Pitch (Coarse) | Cup Dia. (dc) | Hex Key Size | Lengths Available |
|---|---|---|---|---|
| M3 | 0.5 mm | 1.4 mm | 1.5 mm | 3–20 mm |
| M4 | 0.7 mm | 2.0 mm | 2 mm | 4–30 mm |
| M5 | 0.8 mm | 2.5 mm | 2.5 mm | 4–40 mm |
| M6 | 1.0 mm | 3.0 mm | 3 mm | 5–50 mm |
| M8 | 1.25 mm | 4.0 mm | 4 mm | 6–60 mm |
| M10 | 1.5 mm | 5.0 mm | 5 mm | 8–80 mm |
| M12 | 1.75 mm | 6.0 mm | 6 mm | 10–100 mm |
| M16 | 2.0 mm | 8.0 mm | 8 mm | 16–120 mm |
| M20 | 2.5 mm | 10.0 mm | 10 mm | 20–150 mm |
| M24 | 3.0 mm | 12.0 mm | 12 mm | 25–200 mm |
Property Classes
When to Use Cup Point (DIN 916)
✓ Best Applications
- General-purpose clamping — the default choice for most set screw applications
- Shaft collars and hubs — good grip without excessive damage
- Pulleys and gears — balanced holding power and repositionability
- When unsure — cup point is almost always a safe choice
- Moderate repositioning — ring mark allows return to approximate position
⚠️ Consider Alternatives When
- No marking allowed → Use DIN 913 (Flat Point)
- Maximum grip required → Use DIN 914 (Cone Point)
- Precise positioning → Use DIN 915 (Dog Point)
Set Screw Point Comparison
| Point Type | DIN/ISO | Holding Power | Shaft Damage | Best For |
|---|---|---|---|---|
| Cup Point | 916/4029 | ⭐⭐⭐⭐ | Moderate | General purpose — most common choice |
| Cone Point | 914/4027 | ⭐⭐⭐⭐⭐ | High | Maximum grip, permanent installations |
| Flat Point | 913/4026 | ⭐⭐⭐ | Minimal | Hardened shafts, frequent adjustment |
| Dog Point | 915/4028 | ⭐⭐⭐⭐ | None (hole) | Precision positioning, keyway engagement |
Common Applications
DIN 916 vs ISO 4029
💡 Are They Interchangeable?
Yes — DIN 916 and ISO 4029 are dimensionally identical and fully interchangeable. Both standards define hex socket set screws with a cup point. ISO 4029 is the international standard that supersedes DIN 916, but specifications remain the same.
Shop DIN 916 Cup Point Set Screws
The most versatile set screw. Available in alloy steel (Class 45H, 14.9) and stainless steel. Sizes M3 through M24.
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