ISO 7049 is the international standard for phillips pan head self-tapping screw — gb/t 845 / iso 7049 (series 032). This page sets out what the standard governs, the size range it specifies, and the related standards you will see referenced in datasheets.
ISO 7049 — Scope
ISO 7049 specifies the dimensions and tolerances of phillips pan head self-tapping screw — gb/t 845 / iso 7049 (series 032). Material, property class, surface finish and packaging are governed by separate documents in the same standards family (for example ISO 898-1 for the mechanical property classes of bolts and screws).
Tolerance & Product Grades
ISO 7049, alongside the related GB/T 845 / ISO 7049 entries on this site, specifies product grades (typically A or B for fine work and C for general engineering) and tolerance classes for the controlling dimensions. Choose the grade against the precision your application requires.
Dimensions Specified by ISO 7049
| Size | Pitch (mm) | Length L (mm) | Head diameter dk (mm) | Head height k (mm) | Cross recess | Reference standard |
|---|---|---|---|---|---|---|
| M3 | 0.5 | 20 | 5.6 | 1.8 | PH1 | ISO 7045 / GB/T 818 |
| M4 | 0.7 | 25 | 8.0 | 2.4 | PH2 | ISO 7045 / GB/T 818 |
| M5 | 0.8 | 30 | 9.5 | 3.0 | PH2 | ISO 7045 / GB/T 818 |
| M6 | 1.0 | 40 | 12.0 | 3.6 | PH3 | ISO 7045 / GB/T 818 |
| M8 | 1.25 | 50 | 16.0 | 4.8 | PH3 | ISO 7045 / GB/T 818 |
| M10 | 1.5 | 60 | 20.0 | 6.0 | PH4 | ISO 7045 / GB/T 818 |
Companion Standards
ISO 7049 controls only the geometry of phillips pan head self-tapping screw — gb/t 845 / iso 7049 (series 032). The mechanical strength is set by ISO 898-1 (bolts and screws) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards (e.g. ISO 4042 for electroplating). For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).
When to Specify ISO 7049
Choose ISO 7049 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for phillips pan head self-tapping screw — gb/t 845 / iso 7049 (series 032).