Overview
ISO 15483:1999 specifies the characteristics of cross recessed raised countersunk head drilling screws with tapping screw thread. The standard covers dimensional, geometric and identification requirements for drilling screws with tapping threads in sizes ST2,9 to ST6,3, and defines head and recess forms used in manufacture, inspection and procurement of these fasteners.
Key topics and requirements
- Product range: Drilling screws with tapping screw thread sizes from ST2,9 up to ST6,3.
- Head and recess types: Raised countersunk head with cross recess variants (Type H and Type Z); cross recess sizes corresponding to No. 1, 2 and 3.
- Dimensions and tolerances: Nominal lengths, head heights, thread run-out and drilling point characteristics are defined (see Table 1 in the standard). Pitch (P), major diameters and drilling ranges (sheet/plate thickness) are specified for correct selection and gauging.
- Mechanical and functional properties: References ISO 10666 for drilling-point function and mechanical/functional requirements. Product grade and tolerance guidance references ISO 4759-1.
- Surface finish and acceptance: Plain finish is covered; electroplating requirements are referenced to ISO 4042. Acceptance inspection procedures are referenced to ISO 3269.
- Designation: The standard defines a clear designation format. Example:
Drilling screw ISO 15483 - ST3,5 3 16 - Z
Applications and users
ISO 15483 is practical for organizations involved in the specification, manufacture, inspection and procurement of self-drilling tapping screws:
- Fastener manufacturers and production engineers (to design and produce compliant screws)
- Product designers and mechanical engineers (to select correct screw geometry and drilling range for sheet-metal assemblies)
- Quality assurance and inspection teams (for dimensional and acceptance checks)
- Purchasing and supply chain specialists (for unambiguous component identification in procurement)
- Fastener distributors and installers (to match screws to material thickness and application)
Typical applications include fastening thin sheet metal, light structural components and assemblies where a raised countersunk aesthetic or flush seating is required.
Related standards
ISO 15483 cross-references and works with several ISO standards:
- ISO 10666 - Drilling screws with tapping screw thread: mechanical and functional properties
- ISO 1478 - Tapping screw threads
- ISO 4757 - Cross recesses for screws
- ISO 4759-1 - Tolerances for fasteners (product grades)
- ISO 4042 - Electroplated coatings (finish)
- ISO 3269 - Fasteners - Acceptance inspection
Keywords: ISO 15483, cross recessed raised countersunk head drilling screws, tapping screw thread, drilling screws, fasteners, ISO standard, screw dimensions, Type H, Type Z.
