Overview
| brand | Cantonese snail | Nominal diameter | twenty-seven |
| length | two hundred and twenty | material quality | Carbon steel grade 10.9 |
| Applicable scope | Marine fasteners | producing area | Guangzhou |
| colour | white | Functional purpose | |
| Packaging specifications | two hundred | model | M27 * 220 |
| 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 | Carbon steel grade 8.8 |
Product Details
Heat treatment technology has a crucial impact on high-strength fasteners, especially their internal quality. Therefore, in order to produce high-quality high-strength fasteners, advanced heat treatment technology and equipment are necessary. The current status of heat treatment for high-strength fasteners There are four performance levels for high-strength fasteners, namely 8.8, 9.8, 10.9, and 12.9 levels. And these four levels of high-strength fasteners need to undergo quenching and tempering treatment. Heat treatment and tempering are aimed at improving the comprehensive mechanical properties of fasteners to meet the specified tensile strength and yield ratio of the product. Therefore, the quenching and tempering process has strict requirements for raw materials, furnace temperature control, furnace atmosphere control, quenching medium, and quality inspection and control of heat treatment.
Self locking nuts generally rely on friction, and their principle is to press the embossed teeth into the preset holes of the sheet metal. Generally, the hole diameter of the square preset hole is slightly smaller than that of the rivet nut. Connect the nut to the locking mechanism. When tightening the nut, the locking mechanism locks the ruler body and the ruler frame cannot move freely, achieving the purpose of locking; When loosening the nut, the locking mechanism disengages the ruler body and the ruler frame moves along the ruler body
Washers are divided into: flat washer - C grade, large washer - A and C grade, extra large washer - C grade, small washer - A grade, flat washer - A grade, flat washer - chamfer type - A grade, high-strength washer for steel structure, spherical washer, conical washer, square bevel washer for I-beam, square bevel washer for channel steel, standard spring washer, light spring washer, heavy spring washer, inner tooth lock washer, inner tooth lock washer, outer tooth lock washer, outer tooth lock washer Single ear stop washer, double ear stop washer, outer tongue stop washer, and stop washer for round nuts.
Flat washers are frequently used in mechanical connections and are usually placed between nuts or screw heads and the connected parts to prevent screws or nuts from loosening during use. The upper and lower end faces of conventional flat gaskets are mostly smooth planes with a single structure and poor compressive strength. When assembling with nuts or screws, the pressure on the flat gasket increases, and it is prone to fracture when tightly fitting and rubbing with the nuts or screws, greatly affecting the quality of the product.
