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din7991

DIN 7991 - 1986 Hexagon Socket Countersunk Head Cap Screws

Metric DIN 7991 hexagon socket cap screws have a flat countersunk head with an internal hexagonal drive suited for a hex / Allen key or wrench. The internal drive is ideal for situations where externally wrenched screws are impractical such as in applications where limited space is available. Bhalla Fasteners offers an extensive range of metric DIN 7991 hexagon socket cap screws in both mm and inches dimensions. Diameters ranging from M4to M20 in lengths up to 150mm

Tightening Procedure:

While holding the key insert the key into the socket and apply the torque on the nut .The torque be applied on the screw itself it should be reduced accordingly.

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Weight Table

 Din7991 weight chart and standard dimensions

d
M3 M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 (M22) M24
P Pitch
α tol.(+2)
b L≤125
125<L ≤ 200
L>200
dk max=nominal size
min
ds max=nominal size
min
e min
k max
s Nominal Size
min
max
t max=nominal size
min
0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3
90° 90° 90° 90° 90° 90° 90° 90° 90° 90° 90° 60° 60°
12 14 16 18 22 26 30 34 38 42 46 50 54
/ / / 24 28 32 36 40 44 48 52 56 60
/ / / / / 45 49 53 57 61 65 69 73
6 8 10 12 16 20 24 27 30 33 36 36 39
5.7 7.64 9.64 11.57 15.57 19.48 23.48 26.48 29.48 32.38 35.38 35.38 38.38
3 4 5 6 8 10 12 14 16 18 20 22 24
2.86 3.82 4.82 5.82 7.78 9.78 11.73 13.73 15.73 17.73 19.67 21.67 23.67
2.3 2.87 3.44 4.58 5.72 6.86 9.15 11.43 11.43 13.72 13.72 16 16
1.7 2.3 2.8 3.3 4.4 5.5 6.5 7 7.5 8 8.5 13.1 14
2 2.5 3 4 5 6 8 10 10 12 12 14 14
2.02 2.52 3.02 4.02 5.02 6.02 8.025 10.025 10.025 12.032

 

Specification Table
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Bhalla Fasteners is the leading  manufacturer, supplier and exporter of  Din7991 screw used in wood applications in USA ,UK ,Poland, Germany , Austrailia, Ireland, and European countries