DIN 913 Set Screw (Flat Point) Specifications
DIN 913 Set Screws – Flat Point
ISO Equivalent: ISO 4026 | Hex Socket Flat Point Grub Screws
DIN 913 defines hex socket set screws with a flat point — ideal for permanent positioning against hardened surfaces or when a large contact area is needed. The flat tip distributes pressure evenly without marking the workpiece.
Quick Specifications
Key Features
Flat Point Design
Large contact area distributes clamping force evenly. Won't mark or damage hardened shafts and surfaces.
Permanent Positioning
Ideal when parts need to be locked in place without creating a witness mark for future repositioning.
Hex Socket Drive
Internal hex allows high torque application with standard Allen keys. Fully recessed for flush mounting.
Headless Design
No protruding head — sits completely below the surface when installed in a threaded hole.
Dimension Chart
| Size | Pitch (Coarse) | Flat Dia. (df) | Hex Key Size | Lengths Available |
|---|---|---|---|---|
| M3 | 0.5 mm | 2.0 mm | 1.5 mm | 3–20 mm |
| M4 | 0.7 mm | 2.5 mm | 2 mm | 4–30 mm |
| M5 | 0.8 mm | 3.5 mm | 2.5 mm | 4–40 mm |
| M6 | 1.0 mm | 4.0 mm | 3 mm | 5–50 mm |
| M8 | 1.25 mm | 5.5 mm | 4 mm | 6–60 mm |
| M10 | 1.5 mm | 7.0 mm | 5 mm | 8–80 mm |
| M12 | 1.75 mm | 8.5 mm | 6 mm | 10–100 mm |
| M16 | 2.0 mm | 11.0 mm | 8 mm | 16–120 mm |
| M20 | 2.5 mm | 14.0 mm | 10 mm | 20–150 mm |
| M24 | 3.0 mm | 17.0 mm | 12 mm | 25–200 mm |
Property Classes
When to Use Flat Point (DIN 913)
✓ Best Applications
- Hardened shafts where marking is unacceptable
- Frequent adjustment without damaging the contact surface
- Thin-walled parts where a point could penetrate
- Soft metals (aluminum, brass) where a flat distributes load
- Permanent positioning against a machined flat on the shaft
⚠️ Consider Alternatives When
- Maximum holding power is needed → Use DIN 914 (Cone Point)
- Precise positioning required → Use DIN 915 (Dog Point)
- General purpose clamping → Use DIN 916 (Cup Point)
Common Applications
DIN 913 vs ISO 4026
💡 Are They Interchangeable?
Yes — DIN 913 and ISO 4026 are dimensionally identical and fully interchangeable. Both standards define hex socket set screws with flat point. ISO 4026 is the international standard that supersedes DIN 913, but specifications remain the same.
Shop DIN 913 Flat Point Set Screws
Available in alloy steel (Class 45H, 14.9) and stainless steel. Sizes M3 through M24.
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