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DIN 609:2016 Hex Head Fit Hole Long Thread Bolt

DIN 609:2016 Hex Head Fit Hole Long Thread Bolt is used where hole fit, positioning accuracy, and shear-bearing performance are required. The fit-hole design helps reduce assembly clearance and improves relative stability between connected components.

The long thread increases clamping adjustment range, making it suitable for thick plates, multi-layer structures, or assemblies that need extended thread engagement. Its hex head supports controlled tightening in mechanical structures, tooling equipment, support parts, and locating joints.

When selecting this product, hole fit, thread length, grip thickness, and surface treatment should be considered together. For shear, impact, or repeated assembly conditions, precision holes and well-matched accessories can further improve joint reliability.

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PREV：DIN 6914:1989 Structural High Strength Heavy Hex Bolt NEXT：DIN 960:1990 Fine Thread Hex Head Bolt

Dimensions unit: mm

Thread size M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
d
P Pitch Coarse teeth 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3
Fine teeth 1 1 1.25 1.25 1.5 1.5 1.5 1.5 1.5 2
Fine teeth 2 - 1 1.5 - - 2 2 2 1.5
b L≤50 14.5 17.5 20.5 22 25 27.5 28.5 32.5 -
50＜L≤150 16.5 19.5 22.5 24 27 29.5 30.5 34.5 36.5
L＞150 21.5 24.5 27.5 29 32 34.5 35.5 39.5 41.5
ds Nominal(K6) 9 11 13 15 17 19 21 23 25
Min. 9.001 11.001 13.001 15.001 17.001 19.002 21.002 23.002 25.002
Max. 9.01 11.012 13.012 15.012 17.012 19.015 21.015 23.015 25.015
d0 Min. 7.9 9.9 11.5 13.5 15.5 17.5 19.1 21.1 23.1
Max. 8.2 10.2 11.8 13.8 15.8 17.8 19.4 21.4 23.4
e Min. 14.38 17.77 19.85 22.78 26.17 29.56 32.95 37.29 39.55
k Nominal 5.3 6.4 7.5 8.8 10 11.5 12.5 14 15
Min. 5.15 6.22 7.21 8.51 9.71 11.15 12.15 13.65 14.65
Max. 5.45 6.58 7.79 9.09 10.29 11.85 12.85 14.35 15.35
k1 Min. 3.61 4.35 5.05 5.96 6.8 7.81 8.51 9.65 10.26
r Min. 0.4 0.4 0.6 0.6 0.6 0.6 0.8 0.8 0.8
Max. 0.55 0.55 0.75 0.75 0.75 0.75 0.95 0.95 0.95
s Max.=Nominal 13 16 18 21 24 27 30 34 36
Min. 12.73 15.73 17.57 20.16 23.16 26.16 29.16 33 35
Lg (max) - - - - - - - - -
Thousand pieces of steel weigh ≈kg  - - - - - - - - -

Thread size (M27) M30 (M33) M36 (M39) M42 (M45) M48 (M52)
d
P Pitch Coarse teeth 3 3.5 3.5 4 4 4 4 4 4
Fine teeth 1 2 2 2 3 3 3 3 3 3
Fine teeth 2 - - - - - - - - -
b L≤50 - - - - - - - - -
50＜L≤150 39.5 43 45 49 51 56 59 63 65
L＞150 44.5 48 50 54 56 61 64 68 70
ds Nominal(K6) 28 32 34 38 40 44 46 50 55
Min. 28.002 32.002 34.002 38.002 40.002 44.002 46.002 50.002 55.002
Max. 28.015 32.018 34.018 38.018 40.018 44.018 46.018 50.018 55.021
d0 Min. 25.7 29.7 31.7 35.7 37.7 41.7 43.7 47.7 52.7
Max. 26 30 32 36 38 42 44 48 53
e Min. 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25
k Nominal 17 19 21 22 25 26 28 30 33
Min. 16.65 18.58 20.58 21.58 24.58 25.58 27.58 29.58 32.5
Max. 17.35 19.42 21.42 22.42 25.42 26.42 28.42 30.42 33.5
k1 Min. 11.66 13.01 14.41 15.11 17.21 17.91 19.31 20.71 22.75
r Min. 1 1 1 1 1 1 1 1 1
Max. 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15 1.15
s Max.=Nominal 41 46 50 55 60 65 70 75 80
Min. 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1
Lg (max) - - - - - - - - -
Thousand pieces of steel weigh ≈kg - - - - - - - - -

① A-type or R-type centering holes can be set according to DIN 332-1 (centering holes are suitable for products that require additional [large diameter polished rod] screws. For products that do not require additional screws, the centering holes are determined by the manufacturer)

② Material:

a) Steel, strength grade (material): d≤39mm: 8.8; d>39mm according to agreement. StandardDIN EN ISO 898-1

b) Stainless steel, strength grade (material): d≤20mm: A2-70; 20 < d≤39mm: A2-50; d > 39mm according to agreement. Standard DIN EN ISO 3506-1, DIN EN ISO 3506-3

c) Non-ferrous metals, performance levels: CU2, CU3. StandardDIN EN 28839 

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