ISO 7046-2-2011 PDF

Full title and description

ISO 7046-2:2011 — Countersunk flat head screws (common head style) with type H or type Z cross recess — Product grade A — Part 2: Steel screws of property class 8.8, stainless steel screws and non‑ferrous metal screws. Specifies dimensional and product requirements for recessed countersunk flat head machine screws with threads M2 up to and including M10, covering steel (8.8), stainless steel (A2‑70) and specified non‑ferrous material grades.

Abstract

Defines the characteristics (dimensional limits, head and recess forms, thread sizes, material/property classes and basic finishes) for cross‑recessed countersunk flat head screws of product grade A, threads M2–M10, intended for general engineering and fastening applications. The edition was published in 2011 and later confirmed on review.

General information

• Status: Published (confirmed on periodic review).
• Publication date: September 2011 (Edition 2, 2011).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.060.10 (Bolts, screws, studs).
• Edition / version: 2 (2011).
• Number of pages: 6 (official ISO publication length).

Core bibliographic and lifecycle information as published by ISO (edition 2, 2011; reviewed and confirmed in ISO’s 2021 review cycle).

Scope

ISO 7046-2:2011 applies to recessed (cross‑recessed) countersunk flat head screws of product grade A with threads M2 up to and including M10. It specifies head form and recess types (H or Z), dimensional limits, minimum thread engagement parameters and the relevant property classes for materials: steel of property class 8.8, stainless steel A2‑70 and designated non‑ferrous metal grades (CU2, CU3). Where special or alternative requirements are needed, users are directed to referenced ISO standards for thread, tolerance and material specifications.

Key topics and requirements

• Dimensional characteristics for countersunk flat head screws (head diameter, head height, recess dimensions) for thread sizes M2–M10.
• Specification of accepted recess forms: type H and type Z cross recess.
• Product grade: A (general‑purpose machine screws).
• Material / property classes covered: steel (8.8), stainless steel (A2‑70) and specified non‑ferrous grades (CU2, CU3).
• Reference to related ISO standards for threads, tolerances and mechanical properties (used when special values are required).
• Basic finish/appearance requirements and allowances for common finishes used on these screw types.

These topics correspond to the standard’s tables and small set of figures that give precise dimensional limits and example designations.

Typical use and users

Engineers and designers specifying fasteners for assemblies requiring a flush (countersunk) finish; procurement and quality teams checking incoming screw deliveries for conformity; fastener manufacturers and tooling suppliers using the dimensional and recess specifications for production and inspection; testing and certification laboratories performing conformance checks. The standard is widely used across general mechanical engineering, electronics enclosures, consumer goods and machinery where small metric countersunk screws are required.

Related standards

Commonly referenced or related documents and series include ISO 7046‑1 (Part 1: steel screws of property class 4.8 — companion part covering lower strength class and slightly different size ranges), other fastener standards for threads and tolerances (for example ISO 261, ISO 965‑2), material/property standards (ISO 898‑1, ISO 3506‑1), dimensional/clearance standards and regional/adopted EN/DIN versions (EN ISO 7046 series). National or industry equivalents (e.g., DIN 965, ASME B18.6.3 / other machine‑screw specifications) are also commonly used in conjunction with ISO 7046‑2.

Keywords

countersunk flat head screws, cross‑recess, H recess, Z recess, product grade A, metric screws, M2–M10, property class 8.8, A2‑70, non‑ferrous screws, ISO 7046‑2

FAQ

Q: What is this standard?

A: ISO 7046‑2:2011 is an international standard that specifies the dimensional and product requirements for recessed countersunk flat head machine screws (cross‑recessed) of product grade A with thread sizes M2–M10 and specified material/property classes.

Q: What does it cover?

A: It covers head and recess shapes (type H or Z), dimensional limits, applicable thread sizes, material/property class assignments for steel, stainless steel and certain non‑ferrous metals, and basic finish guidance; it also points users to other ISO standards when alternative or more detailed requirements are needed.

Q: Who typically uses it?

A: Design and mechanical engineers, fastener manufacturers, procurement and quality inspection teams, test laboratories and standards committees involved in specifying, producing or verifying small countersunk screws for industrial and consumer products.

Q: Is it current or superseded?

A: The edition in force is ISO 7046‑2:2011 (Edition 2, published September 2011). ISO indicates this edition was reviewed and confirmed in the 2021 review cycle, so it remained current at that confirmation. Users should check institutional subscriptions or the ISO catalogue for any later confirmation or revision notices after 2021.

Q: Is it part of a series?

A: Yes — ISO 7046 is a multipart series. Part 1 and Part 2 are companion documents addressing different property classes and size ranges (for example ISO 7046‑1:2011 covers steel screws of property class 4.8). Other related fastener standards cover alternate head types, thread/tolerance rules and material property standards.

Q: What are the key keywords?

A: countersunk screw, flat head, cross recess, H recess, Z recess, metric machine screw, product grade A, property class 8.8, ISO 7046‑2.