GB/T 3104-1982 Hexagonal fasteners width across flats

GB/T 3104-1982 Width across flats of hexagonal fasteners GB/T3104-1982 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Fasteners
Widths across flats of hexagon products
Fasteners --Widths across flats of hexagon products Introduction
UDC 621.882
GB 3104-82
(Confirmed in 1988)
This standard is equivalent to the international standard ISO272-1982 "Fasteners-Width across flats of hexagon products". This standard specifies the width across flats of hexagonal products and is applicable to standard and non-standard fasteners. 2 Dimensions are as specified in Figures 1, 2 and the table.
Thread diameter
Standard series
Enlarged series
Published by National Bureau of Standards on May 22, 1982
Products with flange face
Thread diameter
Standard serieswww.bzxz.net
Implementation on July 1, 1983
Thread diameter
Standard series
Enlarged series
3The ratio of bearing surface to stress area is shown in Figure 3. Body and
GB 3104—82
Products with flanged surface
·Hexagonal flange series
Thread diameter
.2-2-.30-
41 ----46 -+-50 --1
55 ----50 Enlarged series
-------
_46--- 50 --- 5 Standard series
M6M8 M10 M12 M14 M16 M18 M20 M22 M24M27M30M33M36
Additional remarks:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard was drafted by the Standardization Research Institute of the Ministry of Machinery Industry. This standard was first issued in May 1982.
This standard was confirmed in April 1988.
Standard Series
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