Infly Fasteners is a manufacturer of carriage bolt and Flat head with hole screw.Flat head screw,stud bolt,Flat head with hole screw,non-standard bolt-Infly Fasteners.

Infly Fasteners is a manufacturer of Carriage Bolt, ASTM A307 Carriage screw, Pan Head Square Neck Bolt,Round Head square Neck Bolt, Carriage Bolt Manufactory, Carriage Bolt Factory, Carriage Bolt supplier, China Carriage Bolt. Cap head square neck bolt.US carriage bolt manufactory,round head square bolt factory, Carriage Bolt, ASTM A307 Carriage screw, Pan Head Square Neck Bolt,Round Head square Neck Bolt, Carriage Bolt Manufactory, Carriage Bolt Factory, Carriage Bolt supplier, China Carriage Bolt. Cap head square neck bolt. US carriage bolt, Carriage Bolt manufactory,round head square bolt factory, Carriage Bolt, ASTM A307 Carriage screw, Pan Head Square Neck Bolt,Round Head square Neck Bolt, Carriage Bolt Manufactory, Carriage Bolt Factory, Carriage Bolt supplier, China Carriage Bolt. Cap head square neck bolt.

The most commonly used standard carriage bolts to the German IN603, as the metric unit is mm, the grade of the material is generally marked mostly 4.8 level and 8.8 level, many countries have adopted this standard, as one of the international standard carriage screws, metric Metric Standards of other countries are based on the DIN603 standard, carriage bolts according to the different size, cold heading specifications are M5, M6, M8, M10, M12, M16, and a large size such as M20 more difficult to fight, the general use of red red or red upsetting forging. The majority of products export or export parts to use, few domestic assembly.
Chinese general domestic use GB/T 12 or GB/T 14 carriage screws, is one of the most commonly used to China standard parts, mm mm, level is divided into 4.8, 8.8, 10.9, GB12 for small head carriage bolts, head diameter than the standard DIN603 and GB14, but the thickness ratio of the standard to thick, square neck edge and highly consistent with the DIN603 standard. The GB14 is equivalent to DIN603 Debiao, size difference, general general.


American carriage bolts standard for ASME/ANSI B18.5, divided into metric (mm or metric mm), inch (inch inches), grade and metric American Standard carriage screws are not the same, divided into grade 2 (equivalent to 4.8 Metric), grade 5 (equivalent to 8.8 grade male), Grade 8 (equivalent to 10.9 metric), and ASTM A307, the American carriage bolt fasteners are one of the most commonly used in Imperial units, and the size is similar to DIN603, the majority of countries in the use of units of inches, carriage screws for most common standards which is internationally recognized.
Non standard carriage bolts, English is also called Non-standard carriage bolt, is based on customer size or special needs to order the non-standard shaped bolts, according to the head shaped roughly divided into small head, head type carriage screws, according to the neck can be divided into short square neck, low square neck, Gao Fangjing, dwarf square neck bolts, of course, also can according to the needs of the head cross recessed or slotted, or in the rod diameter drilling thread, these are non-standard screws carriage, or special carriage bolts. Because there is no specific standard for reference, according to the general customer drawings and samples in addition to open mold customization.


Infly Fasteners factory is a professional production manufacturer of carriage bolts, carriage screws main production standards and special non-standard pieces of carriage bolts, provide standard GB12, German DIN603, ANSI B18.5 or ASTM A307 American Standard ANSI carriage bolts can be custom-made. Short square neck, short square neck, Gao Fangjing, low square neck and head type according to customer requirements, non-standard carriage bolt, small head according to the requirements, can be customized for clients head of cross slot, slotted, tail hole, rod diameter holes, cutting tail tail carriage screws of non-standard parts