Overview
ISO 7435:2024 specifies the characteristics of slotted set screws with dog point (long dog point for regular lengths, short dog point for short lengths) in steel and stainless steel, covering metric coarse pitch threads M1.6 to M12 and product grade A. The standard defines dimensions, dimensional options, material and mechanical requirements, surface conditions, marking and labelling, and designation rules to ensure interchangeability and consistent quality for set screws used in fastening and locating applications.
Key topics and requirements
- Scope and sizes: Applies to slotted set screws with dog point for thread sizes M1.6–M12; differentiates short and regular standard lengths and corresponding short/long dog point dimensions.
- Dimensions and tolerances: Detailed dimensions, pitch and point geometry are given (see Tables and Figure in the standard). Thread tolerances follow ISO 965-1 and product tolerances ISO 4759-1.
- Materials and mechanical properties: Covers steel and stainless steel; default product grade A. Hardness classes and stainless grades may be selected per ISO 898-5 (steel) or ISO 3506-3 (stainless).
- Surface condition and coatings: Default deliveries-steel “as processed”, stainless “clean and bright”. Electroplated coatings (ISO 4042) and non-electrolytically applied zinc flake coatings (ISO 10683) are referenced; surface integrity and discontinuity limits reference ISO 6157-1.
- Marking and labelling: Marking on the product is not required unless agreed. Package labelling must include at least the ISO reference, thread size and nominal length, hardness/grade, surface condition, manufacturer ID, lot number (ISO 1891-4) and quantity.
- Designation rules: Follow ISO 8991 designation system with examples provided (e.g., “Set screw ISO 7435 – M5 × 12 – 14H”).
Applications and users
ISO 7435:2024 is used by:
- Fastener manufacturers and suppliers for product specification and production control.
- Mechanical and product designers specifying locating screws in assemblies (machinery, instrumentation, electronics, automotive components).
- Purchasing and quality assurance teams to verify conformity, labelling and lot traceability.
- Test and inspection laboratories performing acceptance inspection per ISO 3269.
Benefits include improved interchangeability, clearer procurement specifications, and consistent quality for slotted set screws with dog points.
Related standards
Key referenced standards for complementary requirements:
Keywords: ISO 7435, slotted set screws, dog point, metric threads M1.6–M12, product grade A, hardness classes, stainless steel, fastener standards, set screw dimensions.
