ISO14581 Hexalobular Socket Countersunk Flat Head Screws
ISO 14581 Hexalobular Socket Countersunk Flat Head Screws are designed for applications where a flush surface finish, reliable fastening, and efficient assembly are required. The countersunk flat head allows the screw to sit level with the material surface after installation, reducing protrusion and providing a clean appearance for finished assemblies.
The hexalobular socket drive provides secure tool engagement and stable torque transmission during tightening, helping reduce the risk of recess damage in production environments. Manufactured according to ISO 14581 requirements, these screws are available in stainless steel, carbon steel, and alloy steel with various strength grades and surface finishes. They are suitable for precision machinery, equipment manufacturing, electronic products, and assemblies where a smooth surface and space-efficient fastening solution are important.
Specification:
| Item | Specification |
|---|---|
| Standard | ISO14581 |
| Product Type | Hexalobular Socket Countersunk Screw |
| Head Type | Countersunk Flat Head |
| Drive Type | Hexalobular Socket |
| Thread Standard | ISO 68-1,ISO 965 |
| Size Range | M2-M10 |
| Material | Stainless Steel/Carbon Steel/Alloy Steel |
| Steel Mechanical Property | ISO 898-1 |
| Stainless Steel Mechanical Property | ISO 3506-1 |
| Surface Treatment | Plain,Zinc Plated,Black Oxidation,Passivation |
| Inspection | Dimensions, Thread ,Mechanical Property, Coating |
Dimension Chart:
| Mon | M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 |
| P | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 | 1.5 |
| dk max | 3.8 | 4.7 | 5.5 | 7.3 | 8.4 | 9.3 | 11.3 | 15.8 | 18.3 |
| dk min | 3.5 | 4.4 | 5.2 | 6.94 | 8.04 | 8.94 | 10.87 | 15.37 | 17.78 |
| k max | 1.2 | 1.5 | 1.65 | 2.35 | 2.7 | 2.7 | 3.3 | 4.65 | 5 |
| No. | T6 | T8 | T10 | T15 | T20 | T25 | T30 | T45 | T50 |
| e | 1.75 | 2.4 | 2.8 | 3.35 | 3.95 | 4.5 | 5.6 | 7.95 | 8.95 |
| t max | 0.64 | 0.79 | 0.83 | 1.32 | 1.53 | 1.51 | 1.78 | 2.54 | 2.8 |
| t min | 0.51 | 0.66 | 0.7 | 1.16 | 1.14 | 1.12 | 1.39 | 2.15 | 2.41 |
- RELATED SCREW LISTS:
- Torx Countersunk Screw
- ASME B18.3 Torx Countersunk Screw
- Button Head Torx Screw
- ISO7380-3 Torx Button Screw
- ASME B18.3 Torx Button Screw
- ISO14583 Torx Pan Head Screw
- Cylindrical Head Torx Screw with Pin
- Cuntersunk Head Torx Screws with Pin
- Button Head Torx Screws with Pin
- ISO14584 Torx Raised Countersunk Head Screws
Mechanical Property:
ISO 898-1 – Carbon Steel and Alloy Steel ISO14581 Screws
ISO 14581 Hexalobular Socket Countersunk Flat Head Screws made from carbon steel or alloy steel can be supplied in accordance with ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1: Bolts, screws and studs with specified property classes. This standard defines mechanical property requirements for specified property classes, including tensile strength, yield strength, and hardness. The applicable property class depends on the material, heat treatment, and screw size.
ISO 3506-1 – Stainless Steel ISO14581 Screws
For corrosion-resistant applications, ISO 14581 Hexalobular Socket Countersunk Flat Head Screws can be manufactured from stainless steel in accordance with ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 1: Bolts, screws and studs with specified grades and property classes. This standard specifies mechanical property requirements for stainless steel fasteners according to their steel grade and property class, such as A2-50, A2-70, and A4-70 where applicable.