DIN 933 Hex Cap Screw (Full Thread)
DIN 933 Hex Cap Screws – Full Thread
ISO Equivalent: ISO 4017 | Metric Hex Bolts – Coarse Thread, Full Thread
DIN 933 defines fully threaded hex head cap screws — versatile metric fasteners for applications requiring maximum thread engagement. Threads run from tip to just under the head, providing flexibility for varying grip lengths.
Quick Specifications
Why Full Thread?
Flexible Grip Range
Full threading allows the nut to be positioned anywhere along the bolt length — ideal for varying material thicknesses.
Tapped Hole Applications
Maximum thread engagement in blind holes. Essential when threading directly into castings or thick plates.
Inventory Simplification
One bolt length can serve multiple grip requirements. Reduces the number of SKUs to stock.
External Hex Drive
Use standard wrenches or sockets. High torque capacity without cam-out risk.
Dimension Chart
| Size | Pitch (Coarse) | Head Width (s) | Head Height (k) | Wrench Size |
|---|---|---|---|---|
| M3 | 0.5 mm | 5.5 mm | 2.0 mm | 5.5 mm |
| M4 | 0.7 mm | 7.0 mm | 2.8 mm | 7 mm |
| M5 | 0.8 mm | 8.0 mm | 3.5 mm | 8 mm |
| M6 | 1.0 mm | 10.0 mm | 4.0 mm | 10 mm |
| M8 | 1.25 mm | 13.0 mm | 5.3 mm | 13 mm |
| M10 | 1.5 mm | 16.0 mm | 6.4 mm | 16 mm |
| M12 | 1.75 mm | 18.0 mm | 7.5 mm | 18 mm |
| M14 | 2.0 mm | 21.0 mm | 8.8 mm | 21 mm |
| M16 | 2.0 mm | 24.0 mm | 10.0 mm | 24 mm |
| M20 | 2.5 mm | 30.0 mm | 12.5 mm | 30 mm |
| M24 | 3.0 mm | 36.0 mm | 15.0 mm | 36 mm |
Property Classes
DIN 933 vs ISO 4017
💡 Are They Interchangeable?
Yes — DIN 933 and ISO 4017 are dimensionally identical and fully interchangeable. The specifications define the same:
- Thread dimensions and tolerances
- Head width across flats
- Head height
- Property class markings
Coarse vs Fine Thread
📏 When to Use Each Thread Type
Coarse Thread (DIN 933):
- General-purpose fastening
- Soft materials (aluminum, plastic)
- Faster assembly
- Better for dirty/damaged threads
Fine Thread (DIN 961):
- Vibration resistance
- Thin-wall applications
- Finer torque adjustment
- Hardened materials
Common Applications
Shop DIN 933 Hex Cap Screws
Full thread hex bolts in Class 8.8, 10.9, and 12.9. Multiple finishes available.
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