Cross recess countersunk head machine screws are designed to sit flush with the workpiece surface when installed into a pre-drilled countersunk hole. Both parts of the standard specify the same head profile with a 90° countersink angle, ensuring a smooth, snag-free surface. The cross recess centers the driving tool and facilitates both manual and automated assembly. Dimensions and technical requirements are defined by DIN EN ISO 7046, which has superseded the older DIN 965 (still found on legacy drawings). The standard is published in two parts: Part 1 (ISO 7046-1) covers screws in property class 4.8 with threads from M1.6 to M10; Part 2 (ISO 7046-2) applies to steel in property classes 8.8, 9.8, 10.9, and 12.9, stainless steel grades A2, A3, A4, and A5, and non-ferrous metals (CU2, CU3), with threads M2 to M10. Both parts share identical head dimensions and countersink geometry; the distinction lies solely in the material and mechanical property classes covered.
Machine Screw Size Chart – Cross Recess, Countersunk Head, Class 4.8, DIN EN ISO 7046-1 Dimensions
Machine Screw Size Chart – Cross Recess, Countersunk Head, Class 8.8, DIN EN ISO 7046-2 Dimensions
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