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Round Head Square Neck Bolts
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Round Head Square Neck Bolts

DONGSHAO, a reputable manufacturer in China, is willing to offer you Round Head Square Neck Bolts. We promise to provide you with the best after-sale support and prompt delivery.

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Product Description

Hebei Dongshao Fastener Manufacturing Co., Ltd. is a well-known supplier and manufacturer of round head square neck bolts in China.


The Round head Square Neck bolts produced by the company is round and can be easily passed through the round hole, making installation and disassembly easier. Its neck has a square shape, hence its name. This design increases its contact area with the nut, thereby increasing the stability of torque transmission.


Material characteristics: Round head square neck bolts are usually made of high quality materials, such as stainless steel alloy steel. These materials have excellent mechanical properties and corrosion resistance, which can ensure that the bolt will not be easily deformed or damaged during the working process.


Performance characteristics: round head square neck bolt has high precision and good rust resistance. At the same time, Dacromet surface treatment technology can effectively protect the bolt from the impact of environment and corrosion, extending the service life of the bolt.


Round head square neck bolts are used in vehicles and mechanical equipment: round head square neck bolts play an important role in various vehicles and mechanical equipment. For example, in automobile manufacturing, it is widely used in the connection and fixing of wheels, axles and bodies; In construction machinery, it is used in the connection and fixing of various structural components; There are also industrial fields and agricultural machinery


Product Parameter

(mm) M6 M8 M10 M12 M14 M16 M20
P 1 1.25 1.5 1.75 2 2 2.5
dk max 13.1 17.1 21.3 25.3 29.3 33.6 41.6
dk min 11.3 15.3 19.16 23.16 27.16 31 39
k1 max 4.4 5.4 6.4 8.45 9.45 10.45 12.55
k1 min 3.6 4.6 5.6 7.55 8.55 9.55 11.45
k max 4.08 5.28 6.48 8.9 9.9 10.9 13.1
k min 3.2 4.4 5.6 7.55 8.55 9.55 11.45
s max 6.3 8.36 10.36 12.43 14.43 16.43 20.82
s min 5.84 7.8 9.8 11.76 13.76 15.76 19.22
r min 0.5 0.5 0.5 0.8 0.8 1 1
ds max 6 8 10 12 14 16 20
ds min 5.35 7.19 9.03 10.86 12.70 14.70 18.38




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