Nuts are often used with bolts and screws. The results show that the self-locking ability and locking ability of the coarse hexagon nut are worse than that of the fine-tooth hexagon nut, but the locking force is greater than that of the fine-tooth hexagon nut; the fine-tooth hexagon nut has good locking performance, which is suitable for anti-vibration and easy to adjust the clearance, but the locking force is worse than that of the coarse hexagon nut, so it is suitable for the place where the clearance or torque should be adjusted. In general, the coarse thread is used if there is no special requirement.
Nut is widely used, and it is often used with bolts, studs, and screws to connect and fasten. Grade A (applicable to nominal thread diameter D ≤ 16 mm) and grade B (suitable for d > 16 mm) nuts are used in machines, equipment, or structures with small surface roughness and high precision requirements. It is characterized by a relatively large tightening force, which can be installed with a movable wrench, an open-ended wrench, or a spectacle wrench, all of which require a larger operating space.

Hebei Fuao Fastener Manufacturing Co.,Ltd, founded in 2009, focus on the production of series high-end building expansion  anchors , insist on providing professional quality and service . Our faith is“Make fasteners with love , let love pass the world”  We have our own zinc plating lines and production plants. The implementation of multi-links strictly control, ensure the  excellent quality. The annual output can be 12,000 tons to ensure timely delivery. The main products of our company are  wedge anchor , drop in anchor , set anchor , sleeve anchor, metal frame anchor, chemical anchor, bolt anchor, ceiling anchor,  4pcs heavy duty anchor, hit anchor and so on.  Creating values and benefifits for our customers all over the world is what FUAO has always been pursuing. Meanwhile, FUAO  is always trying to be a responsible, recognized, respected and popular fastener enterprise by long term intensive hard  working and continuous innovation. It is our responsibility and honor to promote the China fasteners industry to enter the  brand era, and devote our best to achieve the transformation from “Made in China” to “Created in China”.  

Sincerely welcome customers to establish and develop business cooperation with us !