DIN 7991 Screw

DIN 7991 Screw

DIN 7991 Screws

Material

  • Steel, Galvanized steel, Stainless steel A2, A4, Aluminum, Polyamide

Application

  • DIN 7991 screw with countersunk head and internal hexagon is used in shipbuilding, defense industry, machine building, chemical and food industries, instrumentation, where in places after bonding a flat surface is required. The screw has a strength class of 8.8 and 10.9, which puts the screw 7991 in the category of high-strength screws.

Analogues

  • ISO 10642.

Benefits

  • DIN 7991 Screws are Socket Countersunk Screws.
  • Screw DIN 7991 is made of high-strength steel.
  • The screw has a well-designed shape, a countersunk head with an internal hexagon and a special groove for the TORX key.
  • Refers to high-strength fasteners.
  • For screwing, a conventional hexagonal furniture can be fitted, which is released together with the fasteners.
  • The screw can be used as an additional technical decoration.

Operation

  • A screw made of stainless steel is used to restore or assemble electric appliances and machines.
  • It is ideal for materials that require non-conductive and non-magnetic elements.
  • Well cope with the connection of various parts of the body of the car, as well as they are used in machine-tool construction and instrument making.
  • In order to install the screw, it is necessary to pre-drill the hole and place it there, with the back side recommended to fix a nut of the appropriate diameter.
Screw settings Nominal thread diameter d1
M3 M4 M5 M6 M8 M10 M12 M14 M16 M20
Pitch of thread, P 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5
d2 min. 5.54 7.53 9.43 11.34 15.24 19.22 23.12 26.52 29.01 36.05
Max. 6.72 8.96 11.2 13.44 17.92 22.4 26.88 30.8 33.6 40.32
k, max. 1.86 2.48 3.1 3.72 4.96 6.2 7.44 8.4 8.8 10.16
e, min. 2,303 2.873 3.443 4,583 5,723 6,863 9.149 11,429 11,429 13,716
s 2 2.5 3 4 5 6th 8 10 10 12
t, min. 1.1 1.5 1.9 2.2 3 3.6 4.3 4,5 4.8 5.6
B, max. 18 20 22 24 28 32 36 40 44 52
Nominal length, l min. 6th 6th 6th 8 10 12 20 thirty 20 40
Max. thirty 50 70 80 160 160 200 80 260 200
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