DIN 961 Hex Cap Screw (Fine Thread, Full)
DIN 961 Hex Cap Screws – Fine Thread, Full
ISO Equivalent: ISO 8676 | Metric Hex Bolts – Fine Pitch, Full Thread
DIN 961 defines fully threaded fine pitch hex cap screws — the premium choice for vibration-critical applications requiring maximum thread engagement. Combines fine pitch anti-loosening properties with full threading flexibility for tapped holes and varying grip lengths.
Quick Specifications
Best of Both Worlds
Anti-Vibration + Full Thread
Fine pitch resists loosening while full threading allows positioning anywhere along the bolt length.
Tapped Hole Specialist
Maximum thread engagement in blind holes with the anti-loosening benefits of fine pitch.
Precision Adjustment
More threads per mm allows finer preload control. Essential for torque-critical assemblies.
Higher Strength
Shallower thread depth = larger tensile stress area = approximately 10% more strength vs coarse.
Dimension Chart – Fine Thread
| Size | Pitch (Fine) | Coarse Pitch | Head Width (s) | Wrench Size |
|---|---|---|---|---|
| M8×1 | 1.0 mm | 1.25 mm | 13.0 mm | 13 mm |
| M10×1.25 | 1.25 mm | 1.5 mm | 16.0 mm | 16 mm |
| M12×1.5 | 1.5 mm | 1.75 mm | 18.0 mm | 18 mm |
| M14×1.5 | 1.5 mm | 2.0 mm | 21.0 mm | 21 mm |
| M16×1.5 | 1.5 mm | 2.0 mm | 24.0 mm | 24 mm |
| M18×2 | 2.0 mm | 2.5 mm | 27.0 mm | 27 mm |
| M20×2 | 2.0 mm | 2.5 mm | 30.0 mm | 30 mm |
| M22×2 | 2.0 mm | 2.5 mm | 32.0 mm | 32 mm |
| M24×2 | 2.0 mm | 3.0 mm | 36.0 mm | 36 mm |
| M30×2 | 2.0 mm | 3.5 mm | 46.0 mm | 46 mm |
⚠️ Fine pitch MUST be specified when ordering (e.g., "M16×1.5" not just "M16")
Property Classes
DIN Hex Bolt Family Overview
💡 Which Standard Do I Need?
| DIN | ISO | Thread | Threading | Best For |
|---|---|---|---|---|
| DIN 931 | ISO 4014 | Coarse | Partial | Structural, shear-loaded joints |
| DIN 933 | ISO 4017 | Coarse | Full | General purpose, tapped holes |
| DIN 960 | ISO 8765 | Fine | Partial | Vibration + shear strength |
| DIN 961 | ISO 8676 | Fine | Full | Vibration + tapped holes |
Common Applications
Shop DIN 961 Fine Thread Hex Bolts
Fine pitch, full thread hex cap screws in Class 8.8, 10.9, and 12.9.
Shop Hex Bolts