Overview
| brand | Cantonese snail | Nominal diameter | sixteen |
| length | eighty | material quality | Copper and copper alloys |
| Applicable scope | Special fasteners for textile machines | producing area | Zhuhai |
| colour | white | Functional purpose | |
| Packaging specifications | seven hundred | model | M16 * 80 |
| Customized or not | no | Order number | Yue Luo-132 6870 6820 |
| Standard type | European Standard | Delivery time | Within 36 hours |
| Performance level | Level 5.8 | Material grade | Stainless steel A450 |
Product Details
1. Ordinary outer hexagonal wrench - widely used, characterized by a relatively large tightening force. The disadvantage is that there must be sufficient operating space during installation, and adjustable wrenches, open-end wrenches, or eyeglass wrenches can be used during installation. All of these wrenches require a large amount of operating space. 2. Cylindrical head hexagon socket is the most widely used screw among all screws. Because of its large tightening force, it can be operated by using a Hex key. It is very convenient to install, almost used in various structures, and has a beautiful and tidy appearance. The disadvantage is that the tightening force is slightly lower than the outer hexagon. In addition, repeated use is easy to damage the inner hexagon socket, which can not be removed. 3. Pan head inner hexagon - rarely used mechanically, with the same mechanical properties as before, mostly used in furniture. Its main function is to increase the contact surface with wooden materials and enhance the aesthetic appearance. 4. Headless hexagonal socket - must be used on certain structures, such as top wire structures that require significant tightening force or places where cylindrical heads need to be hidden. 5. Countersunk hexagonal socket - mostly used in power machinery, its main function is the same as that of hexagonal socket. 6. Nylon lock nut - a structure with nylon rubber rings embedded in the hexagonal surface to prevent thread loosening, used in powerful machinery. 7. Flange nut - mainly plays the role of increasing the contact surface with the workpiece, mostly used in pipes, fasteners and some stamping and casting parts. 8. Ordinary hex nuts - the most versatile and commonly used fasteners.
"The pre-treatment process is a key process that determines the quality of nickel phosphorus plating on high-strength bolts. The purpose of this process is to remove the passivation layer on the bolt surface and prevent the regeneration of the passivation film. The execution status of this process directly determines the degree of bonding between the substrate and the coating. Most quality accidents that occur in production are caused by poor pre-treatment of bolts. Before plating, the oil stains, rust, and oxide skin attached to the bolt surface must be carefully removed; The difference from electroplating is that it should be inspected more carefully, and plating is absolutely not allowed for bolts that are not treated cleanly.
① Inspection of bolts; Visually inspect the surface quality of bolts, requiring any burrs left by machining to be removed and sharp edges to be rounded off.
② Manual oil removal; Ensure that the surface of the substrate is free of oil stains.
③ Soaking and degreasing; Boil the bolts in alkaline water to remove surface oil stains.
④ Acid washing; To prevent alkaline degreasing solution from contaminating the flash nickel plating bath, acid washing solution is used for electric activation treatment before flash nickel plating.
⑤ Electric activation; Electroactivation treatment with acid solution.
⑥ Flash nickel plating; Flash nickel plating should be used for low alloy steel to increase the bonding strength between the coating and the substrate"
"Stainless steel nut
Hexagon nut (GB6170/DIN934), thin nut (GB6172/DIN439), heavy nut (metric, American), nylon lock nut (DIN985-DIN982 thick), all metal lock nut (DIN980M), cover nut (DIN1587), flange nut (GB6177/DIN6923), flange nut nylon lock nut (DIN6926), square welded nut (DIN928), hexagonal welded nut (DIN929), butterfly nut (GB62, DIN315, American) K hat, etc. Specification: M1.6-M64"
"3. Friction coefficient
The friction angle is an important factor affecting the tightening torque, and the existence of friction is the basis for the normal operation of the locking nut. When the locking nut is working, there is pressure and friction on the contact surface under the elastic restoring force of the threaded piece. During repeated use, the rough positions and edges of the contact surface are smoothed by the cyclic friction, resulting in a smaller friction coefficient and a decrease in the maximum tightening torque of the nut"
