ISO 10642 — Hexagon socket countersunk head screws
Data sheet · Revision 05 · 2026-09-16
Selected dimensions
| Thread | Pitch (mm) | A max. max (mm) | H ref. ref (mm) | J nom. nom (mm) |
|---|---|---|---|---|
| M3 | 0.5 | 6.72 | 1.7 | 2 |
| M4 | 0.7 | 8.96 | 2.3 | 2.5 |
| M5 | 0.8 | 11.2 | 2.8 | 3 |
| M6 | 1 | 13.44 | 3.3 | 4 |
| M8 | 1.25 | 17.92 | 4.4 | 5 |
| M10 | 1.5 | 22.4 | 5.5 | 6 |
| M12 | 1.75 | 26.88 | 6.5 | 8 |
| M16 | 2 | 33.6 | 7.5 | 10 |
| M20 | 2.5 | 40.32 | 8.5 | 12 |
Pitch — thread pitch; A — head diameter; H — head height; J — hex socket size. max. — maximum; nom. — nominal; ref. — reference dimension.
A הוא הקוטר המרבי עד לפינה החדה התאורטית. אין להסיק התאמה מלאה לתקן או שקילות ל-DIN 7991.
A is maximum to the theoretical sharp corner. Full standard conformity or DIN 7991 equivalence is not inferred.
Notes
Scope: These properties apply to the specified supplier product; it does not certify every Metal-Ad item or establish full conformity to the named DIN/ISO standard.
Property class: 12.9
Hardness: Rc 38-43
Tensile stress: 1040 MPa
Yield stress: 945 MPa
Thread class: 4g 6g
Threads: ANSI B1.13M; ISO 262, coarse series only
Shear stress: 630 MPa
Head angle: 90-92 degrees through M20; 60-62 degrees for larger sizes in this supplier catalog. M24 remains excluded pending product identification.
Dimensions / standard reference: B18.3.5M. DIN EN ISO 10642 is listed as an applicable or similar specification. DIN 7991 equivalence is not assumed.
Application: The supplier recommends flat and button heads for moderate fastening applications such as guards, hinges and covers; not critical high-strength applications.
Length tolerance: Up to 16 mm: +/-0.3 mm; over 16 through 60 mm: +/-0.5 mm; over 60 mm: +/-0.8 mm.
Torque guidance: Supplier torque values apply to plain screws and are calculated to induce 420 MPa in the threads. They are guidelines only; induced loads may vary by +/-25% with mating interface conditions, lubrication, finish, hardness and bolt/joint compliance. No universal installation torque is specified here.
Finish and supply: No verified Metal-Ad coating or availability is established here.