ISO 965 is standard for ISO general purpose metric screw threads Tolerances, ISO 965 consists of the following parts:
ISO 965-1 Part 1: Principles and basic data
ISO 965-2 Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality
ISO 965-3 Part 3: Deviations for constructional screw threads
ISO 965-4 Part 4: Limits of sizes for hot-dip galvanized external threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing
ISO 965-5 Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing
Normative references
ISO 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
ISO 261, ISO general purpose metric screw threads — General plan
ISO 1502, ISO general-purpose metric screw threads — Gauges and gauging
ISO 5408, Screw threads — Vocabulary
