Overview
ISO 15482:1999 specifies the characteristics of cross recessed countersunk head drilling screws with tapping screw thread (self-drilling, sheet‑metal tapping screws). The standard covers screws with thread designations ST2,9 to ST6,3 and defines the geometric, dimensional and identification conventions needed for consistent manufacture, procurement and quality control of these fasteners.
Key topics and requirements
- Scope and sizes: Applies to cross‑recessed, countersunk head self‑drilling screws with tapping screw thread ST2,9, ST3,5, ST4,2, ST4,8, ST5,5 and ST6,3.
- Dimensions and tolerances: Dimensioning is given in Figure 1 and Table 1 of the standard and includes parameters such as thread pitch (P), distance from last full thread to seating face (a), nominal and real lengths (c, d), head height (k), radii (r), reference dimension m and recess depths for Type H and Type Z cross recesses.
- Recess types: Defines two cross‑recess styles (Type H and Type Z) and associated depths and reference dimensions for each size.
- Drilling point function: The self‑drilling point diameter and function are referenced to ISO 10666 (self‑drilling screw requirements).
- Related specifications: Normative references used by ISO 15482 include:
Applications and users
ISO 15482 is intended for:
- Manufacturers and toolmakers producing self‑drilling tapping screws for sheet‑metal fastening
- Design and mechanical engineers specifying fasteners for panels, enclosures, cladding and light‑gauge metal assemblies
- Procurement and quality assurance teams verifying compliance at receipt (see ISO 3269)
- Fastener distributors and catalogue publishers who need standardized designations and dimensional data
Typical use cases include fastening where a flush countersunk head and integrated drilling/tapping action are required for efficient assembly of sheet metal parts.
Related standards
- ISO 10666 - self‑drilling screw characteristics (point design and function)
- ISO 1478 - sheet‑metal thread form
- ISO 4757 - cross recess definitions
- ISO 7721 - countersunk head verification
- ISO 4042 - electroplating/coating requirements
- ISO 3269 - inspection and acceptance procedures
- ISO 4759‑1 - tolerances for fasteners
Example designation (from the standard):
Vis autoperceuse ISO 15482 - ST3,5 × 16 - Z
Keywords: ISO 15482:1999, self‑drilling screws, cross recessed countersunk head, tapping screw thread, sheet metal screws, fastener standard.
