The use of eight common nuts is described in detail.

1. Ordinary outer hexagon - widely used, characterized by a relatively large fastening force, the disadvantage is that there should be enough operating space in the installation, installation can be used flexible wrench or open wrench, or glasses wrench above the wrench requires a lot of operating space.

2. Cylindrical head inner hexagon is the most widely used in all screws, because its tightening force is relatively large, the use of inner hexagonal wrench can be operated, installation is very convenient, almost used in various structures, the appearance is more beautiful and neat, the disadvantage is that the tightening force tip is lower than the outer hexagonal, in addition, repeated use is easy to damage the inner hexagonal. Can not be disassembled. Stainless steel nut

3. Hexagons in the tray head are seldom used in machinery. Their mechanical properties are the same as those in furniture. Their main function is to increase the contact surface with wood materials and increase the ornamental appearance.

4. Headless inner hexagons - some structures must be used, such as top-wire structures requiring great tightening force, or places where cylindrical heads need to be hidden.

5. Hexagons in countersunk heads - mostly used in power machinery, the main role is the same as that of hexagons in countersunk heads. Through-hole nut

6. Nylon locking nuts - Nylon rubber ring inlaid in hexagonal surface to prevent loosening of threads, which can be used in strong power machinery.

7. Flange nuts - mainly play the role of increasing the contact surface with the workpiece, mostly used in pipelines, fasteners have been some stamping and casting parts.

8. Ordinary outer hexagonal nuts - the most widely used, but also one of the most common fasteners.

Nuts are parts that are tightly connected with mechanical equipment. Only through internal threads can nuts and bolts of the same specifications be connected together. For example, M4-P.7 nuts can only be connected with M4-P.7 series bolts (in nuts, the inner diameter of M4 nuts is about 4mm, and the distance between 0.7 fingers and two threaded teeth is 0.7mm). Similarly, for example, 1/4-20 nuts can only be matched with 1/4-20 nuts (1/4 finger nuts have an inner diameter of about 0.25 inches, 20 fingers have 20 teeth per inch).

Stainless steel nut

Self-locking nuts, anti-loosening nuts, locking nuts, four-claw nuts, screw-in nut insurance nuts, connecting nuts for thin rod bolts, self-locking hexagonal cover nuts, special base nuts, hexagonal coronal thin nuts and ring nuts.

Fine teeth all metal hexagonal flange face locking nut, all metal hexagonal flange face locking nut, fine teeth non-metal insert hexagonal flange face locking nut, fine teeth hexagonal flange face locking nut

Welded square nuts, welded hexagonal nuts, fastening nuts, embedded round nuts

Slotted round nut, side hole round nut, end hole round nut, small round nut

Round nut, ring nut, butterfly nut

Copper material

Copper nuts, inlaid copper nuts, knurled copper nuts, inlaid copper nuts, injection moulded copper nuts, etc.

alloy

Zinc-copper alloy nuts, etc.