GB/T 8262-1987 Round head oval neck bolts
Basic Information
Standard ID:
GB/T 8262-1987
Standard Name: Round head oval neck bolts
Chinese Name:
圆头椭圆颈螺栓
Standard category:National Standard (GB)
state:Abolished
Date of Release1987-10-01
Date of Implementation:1988-05-01
Date of Expiration:2005-10-14
standard classification number
Standard ICS number:Mechanical systems and general parts>>Fasteners>>21.060.10 Bolts, screws, studs
Standard Classification Number:Machinery>>General Parts>>J15 Pipe Accessories
associated standards
Publication information
other information
Review date:2004-10-14
Drafting unit:Xi'an Coal Mine Design and Research Institute
Focal point unit:China Machinery Industry Federation
Publishing department:National Bureau of Standards
competent authority:China Machinery Industry Federation
Introduction to standards:
This standard applies to round head oval neck bolts used for clamp-type flexible pipe joints. GB/T 8262-1987 Round head oval neck bolts GB/T8262-1987 Standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
Bolts, round head with ovel neck
Bolts, round head with ovel neck This standard applies to round head and ovel neck bolts for ferrule-type flexible pipe joints. 1 Structure and dimensions
The structure and dimensions shall comply with the provisions of the following figure and Table 1 and Table 2. AA
Ministry of Coal Industry of the People's Republic of China approved on September 1, 1987 UDC 621. 882. 6
:621. 643. 4
GB8262
Implementation on May 1, 1988
Basic size
Limit deviation
Basic size
Limit deviation
Basic size
Limit deviation
Basic size
Limit deviation
Basic size
Forging limit deviation
Basic size
Limit deviation
GB826287
2 Technical requirements
Limit deviation
The technical requirements for bolts shall comply with the provisions of Table 3.
GB 8262--87
3 Marking
Mechanical properties
Surface treatment
Surface defects
Acceptance and packaging
The examples of markings for selection are as follows;
GB8262--87
Product grade
GB196--81, GB197--81
GB 3098. 1-- 82
GB 3103. 1-- 82bzxz.net
GB5267--85 Galvanizing
GB 5779. 1-- 86
GB90—85
Round head oval neck bolts with coarse pitch ordinary thread, diameter = 12mm, nominal length = 80mm, mechanical property level 6.8, surface galvanized passivated, grade B should be marked as:
Bolt M12×80-6.8-galvanized passivated GB8262—87 Additional notes:
This standard is under the jurisdiction of Xi'an Coal Mine Design and Research Institute of the Ministry of Coal Industry: This standard was drafted by Xi'an Coal Mine Design and Research Institute of the Ministry of Coal Industry, and the main drafters of this standard were Shi Xiaoxuan and An Zichou.
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