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Mshroom Head Square Neck Bolts
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Mshroom Head Square Neck Bolts

DONGSHAO is one of professional leader China Mshroom Head Square Neck Bolts manufacturers with high quality and reasonable price. Welcome to contact us.

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Product Description

Hebei Dongshao Fastener Manufacturing Co., Ltd. is a well-known supplier and manufacturer of Mshroom head square neck bolts in China. Its Mshroom head square neck bolts accessories are standardized and easy to install. Bayonet design to prevent loose; Excellent surface treatment, corrosion resistance, oxidation resistance, long service life, suitable for harsh environment; Strong fastening force, suitable for high requirements of mechanical engineering and other fields; Different parts of the design design of different diameters and lengths, so as to accurately match different use occasions and needs. 

Mshroom head square neck bolts is generally used for the marble installation of dry pendent, when tightening, the bolt rod will not turn because of the square neck, easy to fix and install, mainly used in some places that need countersunk head screws. In addition, it can also be used for mechanical purposes, placed in a grooved threaded hole for connection use, and the square neck of the screw will be stuck in the slot, preventing the square neck screw from turning in the same direction during installation. Mshroom head square neck bolts is mainly used for connecting parts due to structural constraints are not suitable for hexagonal bolts or bolts are required to have a smooth exposed part of the occasion, such as agricultural machinery foot, wall panel and so on.

The main standards for Mshroom head square neck bolts are GB12-88 and GB/T14-1998. GB12-88 marks the shape of the square neck bolt and the standard size of each part, for example, in the case of the square neck bolt in the diameter of M5, the neck size is the maximum is 4.1, the minimum is 2.9mm. GB/T14-1998 specifies Mshroom head square neck bolts with thread specifications of M5--M20 and product grade of C.

Product Parameter

(mm) M6 M8 M10 M12 M14 M16 M20 M24
P 1 1.25 1.5 1.75 2 2 2.5 3
dk max 15.1 19.1 24.3 29.3 33.6 36.6 45.6 53.9
dk min 13.3 17.3 22.16 27.16 31 34 43 50.8
ds max 6 7 8 9 10 11 12 13
ds min 5.35 6.19 7.03 7.86 8.70 9.70 10.38 11.05
k1 max 4.4 5.4 6.4 8.45 9.45 10.45 12.55 17.55
k1 min 3.6 4.6 5.6 7.55 8.55 9.55 11.45 16.45
k max 3.48 4.48 5.48 6.48 7.9 8.9 10.9 13.1
k min 2.7 3.6 4.6 5.6 6.55 7.55 9.55 11.45
r max 0.5 0.5 0.5 0.8 0.8 1 1 1.5
s max 6.3 8.36 10.36 12.43 14.43 16.43 20.52 24.52
s min 5.84 7.8 9.8 11.76 13.76 15.76 19.72 23.72

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