GB/T 20330-2006 English PDF

US$369.00 · In stock
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GB/T 20330-2006: Drill diameter for use prior to tapping screw threads
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20330-2006	369	Add to Cart	3 days	Drill diameter for use prior to tapping screw threads	Valid

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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: 14,158
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: 1973: Table 3 and table 4, GB/T 7306. 1-2000 and GB/T 7307-2001 pipe thread: tables 5 and 6.

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