DATIAN Fasteners is also a manufacturer of fasteners specializing in the production of high-strength structural steel bolts and nuts. In recent years, structural nuts have been widely used, and the common ones are GB/T 1229 - 2006, etc. GB 1229 structure nuts are widely used in steel structure construction, machinery industry, and oil pipelines.
 
GB 1229 STRUCTURE NUTS: Class 8, 10 Specifications
Structural Nuts GB 1229
GB /T 1229 - 2006 High Strength Large Hexagon Nuts For Steel Structures
GB 1229 STRUCTURE NUTS: Class 8, 10 Dimensions
Legend Making
P=pitch Carbon Steel:8,9
K=height of the nut Thread:6H
D=the nominal diameter of the thread Surface:BLK,ZP,HDG,etc
E=The length of the diagonal
S=The length of the flat
 
There are many fastener manufacturers, but we are one of the best choices for you.
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https://www.dtnut.com/products/gb-1229-structure-nuts-class-8-10/ ↗