GB12 round head carriage bolts, less than half the head square neck carriage, more than half of round carriage bolts, strengthen the round head carriage bolts 
 Product Name: DIN603 Carriage Bolts more than half round head square neck bolts 
 Size: Diameter: M5 - M16 
 Length :20 - 200 
 Product types: standard parts or customized according to customer drawings of non-standard pieces of 
 Product rating 4.8 5.8 6.8 8.8 10.9 12.9 
 Black surface treatment of galvanized hot dip galvanizing electrophoresis Dacromet 

 Kunshan Kun Lo with manufacturing facilities in Ningbo, mainly produce high-strength fasteners, stainless steel fasteners and non-standard shaped pieces. In Kunshan three-dimensional storage for customer service; and has a branch opened in Suzhou, Changzhou and other places, to provide local services. Up to twenty thousand a number of stored products, including: DIN, ANSI, BS, ISO, JIS, GB, etc. standard parts and non-standard products, a complete inventory of products is the first element of the assurance services, and non-standard development has an absolute advantage, not only can we complete large orders for small orders, service matching, and in a short period of time, the product delivered to the client. 
 GB12 semicircle square neck bolts, GB801 less than half the head square neck bolts, GB14 than half of head square neck bolts, GB/794 to strengthen the head square neck bolt 

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