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GB/T 20330-2006 PDF English

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GB/T 20330-2006: Drill diameter for use prior to tapping screw threads
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GB/T 20330-2006English369 Add to Cart 3 days [Need to translate] Drill diameter for use prior to tapping screw threads

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Basic data

Standard ID GB/T 20330-2006 (GB/T20330-2006)
Description (Translated English) Drill diameter for use prior to tapping screw threads
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J41
Classification of International Standard 25.100.30
Word Count Estimation 14,119
Date of Issue 2006-07-20
Date of Implementation 2007-01-01
Quoted Standard GB/T 193-2003; GB/T 7306.1-2000; GB/T 7307-2001; ISO 263-1973
Adopted Standard ISO 2306-1972, MOD
Regulation (derived from) China National Standard Approval Announcement 2006 No.8 (Total No.95)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the pre- tap -tapping screwing length for normal drilling twist drill diameter. Twist diameter approximately equal to the nominal diameter (large diameter) minus the pitch. Drill dimensions listed apply to the following thread: GB/T 193-2003 common thread (coarse and fine pitch series): Table 1 and Table 2, inch thread (UNC and UNF) ISO 263

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