ISO 1483:2011

Overview

ISO 1483:2011 specifies the characteristics of slotted raised countersunk (oval) head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive. The standard defines head forms, dimensional requirements, material and mechanical property references, designation rules and acceptance criteria for these tapping screws used primarily for fastening into sheet and thin-section materials.

Key topics and technical requirements

• Scope and dimensions: Detailed dimensional data are given (Figure 1 and Table 1) for thread sizes ST 2,2 → ST 9,5, including head geometry, slot type and preferred nominal lengths.
• Head types: Multiple head configurations are covered (Type C, Type F, Type R), with notes on edge form (rounded or flat) and measurement points.
• Materials and mechanical properties:
  • Steel tapping screws: referenced to ISO 2702 (heat-treated steel tapping screws).
  • Stainless-steel tapping screws: referenced to ISO 3506-4 (mechanical properties for corrosion‑resistant tapping screws).
• Threads and tolerances:
  • Thread form and pitch reference: ISO 1478 (tapping screw thread).
  • General tolerances and product grade: ISO 4759‑1 (product grade A typically indicated).
• Surface finish and coatings:
  • Electroplating: ISO 4042.
  • Passivation for stainless steel: ISO 16048.
  • Zinc-flake (non-electrolytic) coatings: ISO 10683.
• Acceptance and inspection: Acceptance inspection procedures referenced in ISO 3269; general fastener requirements in ISO 8992.
• Designation examples:
  • Steel: Tapping screw ISO 1483 - ST 3,5 × 16 - St - R
  • Stainless steel: Tapping screw ISO 1483 - ST 3,5 × 16 - A4-20H - R

Applications and users

Practical uses:

• Fastening sheet metal, light structural assemblies, electrical enclosures, appliances, furniture and general manufacturing where self-tapping screws are required. Who uses ISO 1483:2011:
• Fastener manufacturers and product designers specifying slotted raised countersunk (oval) head tapping screws.
• Purchasing and quality engineers verifying dimensions, materials and acceptance criteria.
• Suppliers, distributors and compliance officers ensuring product conformity and correct designation in procurement documents.

Related standards

• ISO 225 (symbols and dimension descriptions)
• ISO 1478 (thread)
• ISO 2702, ISO 3506-4 (mechanical properties)
• ISO 4759-1 (tolerances)
• ISO 7721 (countersunk head gauging)
• ISO 4042, ISO 10683, ISO 16048 (coatings/finish)
• ISO 3269, ISO 8992 (inspection and general requirements)

Keywords: ISO 1483:2011, slotted raised countersunk (oval) head tapping screws, tapping screws ST 2.2 to ST 9.5, fastener standards, tapping screw dimensions, ISO tapping screw designation.