JB/T 994-1977 Hexagonal flat nuts for pipe fittings

JB/T 994-1977 Hexagonal flat nuts for pipe joints JB/T994-1977 Standard download decompression password: www.bzxz.net

Standard of the First Machinery Industry Department of the People's Republic of China
Small hexagonal flat nuts for pipe fittings
JB994-
Replaces JB994-67
This standard only specifies small hexagonal flat nuts for welding, ferrule and flared pipe fittings. 30
Marking example:
D≥0.95S
Small hexagonal flat nut with thread diameter d52mm and pitch 2mm: nut M52×2JB994--77
Issued by the First Machinery Industry Department of the People's Republic of China, proposed by the Standardization Research Institute of the First Machinery Industry Department4bzxZ.net
Implemented on May 1, 1977
Drafted by Jinan Foundry and Forging Machinery Research Institute, etc.d
M33×2
M39×2
M45×2
M52×2
M60×2
Nominal size
JB.994--77
Total 2 pages Page 2
Nominal size
Note: M10×1, M12×1.25, M14×1.5, M16×1.5, M18×1.5, M20×1.5, M22×1.5, M24×1.5, M27×1.5, M30×1.5, M36×2, M42×2 sizes and their markings shall be selected in accordance with GB53-76 "Small Hexagonal Flat Nuts".
Technical conditions shall be in accordance with GB61-76 "Technical Conditions for Nuts". 5
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