Technical Data Sheet

max = maximum; min = minimum
Active drawing
Hex Socket Sunk Screws
Use legacy DIN 7991 or current ISO 10642 geometry as the starting point for a custom countersunk socket screw. Specify the 90-degree head angle, head diameter and height, flush seating, hex-socket engagement, thread, length, material, property class, finish, tolerances and inspection requirements.
Use this DIN 7991 drawing generator to configure dimensions, review the technical drawing and export a custom drawing for manufacturing. Whether the specification is written as DIN 7991 or DIN7991, this online drawing tool covers the same Hex Socket Sunk Screws standard reference.
DIN 7991 is the legacy designation and ISO 10642 / DIN EN ISO 10642 is the modern standards route. The screw and mating countersink must use a compatible 90-degree seating geometry, and countersunk-head strength must not be assumed from a cylindrical-head screw. Modified head, socket, thread or seating requirements will be manufactured to the approved drawing.

max = maximum; min = minimum
Unit: mm
| Dimension | P | dk/max | dk/min | e/min | k/max | s/min | s/max | t/max | t/min |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 6 | 5.7 | 2.3 | 1.7 | 2.02 | 2.1 | 1.2 | 0.95 |
| M4 | 0.7 | 8 | 7.64 | 2.87 | 2.3 | 2.52 | 2.6 | 1.8 | 1.55 |
| M5 | 0.8 | 10 | 9.64 | 3.44 | 2.8 | 3.02 | 3.1 | 2.3 | 2.05 |
| M6 | 1 | 12 | 11.57 | 4.58 | 3.3 | 4.02 | 4.12 | 2.5 | 2.25 |
| M8 | 1.25 | 16 | 15.57 | 5.72 | 4.4 | 5.02 | 5.14 | 3.5 | 3.2 |
| M10 | 1.5 | 20 | 19.48 | 6.86 | 5.5 | 6.02 | 6.14 | 4.4 | 4.1 |
| M12 | 1.75 | 24 | 23.48 | 9.15 | 6.5 | 8.025 | 8.175 | 4.6 | 4.3 |
| M14 | 2 | 27 | 26.48 | 11.43 | 7 | 10.025 | 10.175 | 4.8 | 4.5 |
| M16 | 2 | 30 | 29.48 | 11.43 | 7.5 | 10.025 | 10.175 | 5.3 | 5 |
| M18 | 2.5 | 33 | 32.38 | 13.72 | 8 | 12.032 | 12.212 | 5.5 | 5.2 |
| M20 | 2.5 | 36 | 35.38 | 13.72 | 8.5 | 12.032 | 12.212 | 5.9 | 5.6 |
| M22 | 2.5 | 36 | 35.38 | 16 | 13.1 | 14.032 | 14.212 | 8.8 | 8.44 |
| M24 | 3 | 39 | 38.38 | 16 | 14 | 14.032 | 14.212 | 10.3 | 9.87 |
Catalog fasteners commonly specified with this drawing family. Confirm size, material and property class against your project drawing.
ISO 10642 / DIN 7991SS316 / A4-80
A4-80 316 stainless countersunk socket screws per ISO 10642 / DIN 7991 for hygienic and flush equipment assemblies.
DIN 934 / ISO 4032 / ASME B18.2.2SS304 / SS316 / A2-70 / A4-80
A2 / A4 stainless hex nuts per ISO 4032 matched to renewable stainless bolt assemblies.
ISO 7089 / DIN 125SS304 / SS316 / —
A2 / A4 stainless flat washers per ISO 7089 for renewable stainless bolt assemblies.
DIN 6797SS304 / SS316 / —
DIN 6797 stainless toothed lock washers in SS304 / SS316.
Send the completed drawing with the selected DIN or ISO geometry, countersink and flushness requirements, socket, thread, material, property class, finish, quantity and inspection documents for review and quotation.
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