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GB/T 4258-2004Parallel shanks countersinks for angles 60-degree, 90-degreeand 120-degreeinclusive (English PDF)

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee

Level / Type

National · Recommended

Issue date

February 10, 2004

Implementation date

August 1, 2004

Scope

GB/T 4258-2004 (Parallel shanks countersinks for angles 60-degree, 90-degreeand 120-degreeinclusive) is available as an English-translated PDF.

GB/T 4258-2004 — Parallel shanks countersinks for angles 60-degree, 90-degreeand 120-degreeinclusive

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Document preview — GB/T 4258-2004

National Standard of the People's Republic of China

ICS: 25.100.30
Classification: J 41
Replacing: GB/T 4258-1984

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee

What this standard covers1
Document data2
Standards quoted by this document3

What this standard covers

This standard specifies: 600�, 90�, 120� Straight Shank Countersinks size. This standard only requires that the metric system, against cutting diameter, mm to 2, mm-countersink drill, later recommended only metric sizes. These dimensions apply only to high-speed steel cutting tools, But production allowed, shank available suitable materials instead, such as carbon steel. Unless otherwise stated, countersink drill made the right cut. Morse taper cone drill at 49 GB/T 1143 is given.

Document data

International classification (ICS): 25.100.30.

Chinese classification (CCS): J41.

Estimated length of the Chinese original: 2,233 words.

Adopted international standard: ISO 3294-1975; IDT.

Supersedes the earlier edition GB/T 4258-1984.

Standards quoted by this document

GB/T 1143

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 1 pages — is available in the English PDF.

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