Overview
EN ISO 4766:2024 - Fasteners: Slotted set screws with flat point defines the characteristics, dimensions and delivery requirements for slotted set screws with a flat point, manufactured in steel and stainless steel. The standard covers metric coarse pitch threads from M1,2 to M12 and applies to product grade A. It supersedes the 2011 edition and aligns with ISO/TC 2 (Fasteners) and CEN/TC 185 work.
Key topics and requirements
- Scope and materials
- Applies to slotted set screws with flat point in steel and stainless steel (product grade A).
- Stainless steel grades and hardness classes may be selected from ISO 3506-3; steel hardness classes from ISO 898-5 where different specifications are required.
- Dimensions & thread range
- Thread sizes covered: M1,2 - M12 (metric coarse pitch). Dimensions, thread lengths and point geometry are specified in figures and tables.
- Nominal and short standard lengths are defined; additional lengths by agreement in accordance with ISO 888.
- Tolerances & mechanical properties
- Surface condition & coatings
- Default delivery: steel - as processed; stainless steel - clean and bright (passivated option included).
- Electroplated coatings per ISO 4042 and non‑electrolytically applied zinc flake coatings per ISO 10683 may be specified.
- Marking & labelling
- Product marking is optional unless agreed; package labelling must include reference to ISO 4766, thread size and length, hardness or grade, surface finish/coating, manufacturer ID, lot number and quantity.
- Inspection & acceptance
- Acceptance inspection per ISO 3269; surface discontinuity limits referenced to ISO 6157-1.
Applications and users
- Who uses EN ISO 4766:2024
- Fastener manufacturers and heat‑treatment shops
- Assembly and mechanical design engineers specifying set screws
- Procurement and purchasing teams requiring compliant product specifications
- Quality, inspection and test laboratories checking acceptance criteria
- Distributors and OEMs needing consistent labelling and traceability
- Practical uses
- Specifying reliable set screws for machine components, gearboxes, couplings and fixtures where compact securing without head projection is needed.
- Ensuring interchangeability, traceability and consistent mechanical properties across suppliers.
Related standards
Using EN ISO 4766:2024 in specifications ensures clear, internationally harmonized requirements for slotted set screws with flat point, improving supply-chain consistency and product quality.