Overview
EN ISO 2342:2003 - Slotted headless screws with shank (ISO 2342:2003) specifies the dimensional and product characteristics for slotted headless (set) screws with a shank, covering metric thread sizes M1 up to and including M10. It is a European adoption of the ISO document and is intended for use where standardized, interchangeable slotted headless screws are required.
Key topics and technical requirements
- Scope and thread range: Applies to slotted headless screws with shank for threads M1–M10.
- Dimensions and tolerances: Defines nominal diameters, pitches, point types (flat point per ISO 4753), commercial lengths, and key dimensional limits (see Table 1 of the standard for full dimension tables).
- Material and property classes: Covers screws made of steel, stainless steel, and non‑ferrous metals. Typical property classes referenced include 14H, 22H, 45H for steel and A1–12H for stainless; other classes “as agreed” where required.
- Mechanical and finishing requirements: Refers to mechanical properties and acceptance rules in ISO standards such as ISO 898-5, ISO 3506-3, ISO 8839, and acceptance inspection per ISO 3269. Electroplated and zinc-flake finishes are addressed via ISO 4042 and ISO 10683 respectively.
- Surface quality and defects: Surface discontinuities and acceptability follow ISO 6157-1 and acceptance criteria per ISO 3269.
- Designation format: Example - a slotted headless screw, thread M4, length 10 mm, property class 14H is designated:
Headless screw ISO 2342 - M4 10 - 14H
Applications and users
- Design engineers and fastener specifiers who need standardized slotted headless screws for assemblies.
- Manufacturers and suppliers of fasteners ensuring product conformity and interchangeability.
- Quality inspectors and procurement teams using the standard for acceptance inspection criteria and material/property verification.
- Maintenance and repair specialists who replace or source set screws to ISO dimensions and finishes.
Typical applications include securing components where a low-profile, slotted headless screw with shank is required (machinery parts, instruments, fixtures, assemblies with limited head clearance).
Related standards (normative references)
Key referenced standards include: ISO 225, ISO 261, ISO 965-2, ISO 898-5, ISO 3269, ISO 3506-3, ISO 4042, ISO 4753, ISO 4759-1, ISO 6157-1, ISO 8839, ISO 10683. These provide complementary rules on thread forms, tolerances, mechanical properties, coatings and inspection.
Keywords: EN ISO 2342:2003, ISO 2342, slotted headless screws, set screws, metric threads, fasteners, dimensions, property class, ISO fastener standards.