Engineering Data Sheets
Fastener Data Sheets& CAD
Browse ISO, DIN, ASTM and ASME fastener standards with dimensional specifications, CAD blueprints, drilling & clearance data, chemical composition and mechanical properties.
Reference: DIN 931 / ISO 4014
Fastener Catalog & Standard Specification
Active: DIN 931 / ISO 4014 (Hex Bolt (Partial Thread))
Select a fastener below to view its data sheet
DIN 931 / ISO 4014DIN STANDARDPartial ThreadMetric Coarse
Hexagon Head Bolts - Partial Thread
Hex head bolt with an unthreaded smooth shank section providing superior shear resistance and alignment.
CAD Schematic
Nominal blueprint for M12
Engineering Schematic / CAD Dimension InspectorModel: M12 × 50mm
Nominal Thread (d)M12 P=1.75mm
Wrench / Allen (s)19mm e=21.1
Tap Drill DiameterØ 10.2 mm
Tensile Stress Area (Aₛ)84.3 mm²
Manufacturing & Drilling Engineering Notes
- • Thread length formula: b = 2d + 6mm for L <= 125mm; b = 2d + 12mm for 125 < L <= 200mm; b = 2d + 25mm for L > 200mm.
- • Smooth shank provides high shear resistance across mating shear plane.
Size Specification Inspector
M12Select diameter & order quantity
Select Nominal Thread Diameter
Thread Pitch1.75 mm
Wrench (A/F Spanner s)19 mm
Recommended Tap DrillØ 10.2 mm
Clearance Hole (H13)Ø 13.5 mm
Tensile Stress Area (Aₛ)84.3 mm²
Single unit weight (steel): 0.0613 kg
Chemical Composition & Metallurgy
Elemental mass percentages, grain structure & mechanical properties
Elemental Composition (Mass %)
CCarbon0.25 - 0.55%
MnManganese0.60 - 1.20%
PPhosphorus0.025% max
SSulfur0.025% max
SiSilicon0.15 - 0.35%
CrChromium0.20 - 0.50% (Optional)
BBoron0.0008 - 0.005% (Boron-treated)
FeIronBalance (~97.5%)
Mechanical Strength & Heat Treatment
Metallurgical Notes
- • Quenched and tempered at min 425°C to achieve fine tempered martensite microstructure.
- • Meets ISO 898-1 / ASTM F568M Class 8.8 specifications.
- • Boron-alloyed steels must contain min 0.0008% active Boron for hardenability.
Dimensional Specification
Thread / Pitch / Across Flats / Corners / Height / Drill / Clearance / Stress Area (mm)
| Thread (d) | Pitch | A/F (s) | Corners (e) | Height | Tap Drill | Clear H13 | Stress Area | |
|---|---|---|---|---|---|---|---|---|
| M6 | 1 | 10 | 11.05 | 4 | 5 | 6.6 | 20.1 | |
| M8 | 1.25 | 13 | 14.38 | 5.3 | 6.8 | 9 | 36.6 | |
| M10 | 1.5 | 17 | 18.9 | 6.4 | 8.5 | 11 | 58 | |
| M12 | 1.75 | 19 | 21.1 | 7.5 | 10.2 | 13.5 | 84.3 | |
| M14 | 2 | 22 | 24.49 | 8.8 | 12 | 15.5 | 115 | |
| M16 | 2 | 24 | 26.75 | 10 | 14 | 17.5 | 157 | |
| M18 | 2.5 | 27 | 30.14 | 11.5 | 15.5 | 20 | 192 | |
| M20 | 2.5 | 30 | 33.53 | 12.5 | 17.5 | 22 | 245 | |
| M22 | 2.5 | 32 | 35.72 | 14 | 19.5 | 24 | 303 | |
| M24 | 3 | 36 | 39.98 | 15 | 21 | 26 | 353 | |
| M27 | 3 | 41 | 45.63 | 17 | 24 | 30 | 459 | |
| M30 | 3.5 | 46 | 51.28 | 18.7 | 26.5 | 33 | 561 | |
| M36 | 4 | 55 | 61.31 | 22.5 | 32 | 39 | 817 |