There are five main ways to distinguish high strength national standard bolts from fake bolts: 1. Look at the logo, the packing box of the general bolt has the logo. It is divided into 8.8, 10.9 and 12.9 grades. Generally, there is no grade mark on the hexagonal plane of hexagonal bolts. Generally, high strength…
How are the bolt heads and threads processed? The forming of bolt head adopts cold heading plastic processing. Compared with cutting processing, the metal fibers are continuous along the shape of the product without cutting in the middle, which improves the strength of the product, especially the mechanical properties. Cold upsetting process includes cutting and…
Fasteners Classification and Characteristics There are many kinds of fasteners. According to their names, fastener can be divided into seven basic categories: bolts, screws, nuts, rivets, pins, welding nails and washers. Bolts include external hexagonal bolts, flange bolts, double-headed bolts, anchor bolts, U-shaped bolts, live bolts, carriage bolts, etc. Nuts include hexagonal nuts, cap nuts,…
Heavy external hexagonal bolts: Standard: A325M. Level: 4.8/5.8/6.8/8.8/10.9/12.9; Grade 2/5/8. Specification: M6-M24; 1/4 inch-1 inch. Length: 10mm-270mm; 1/2inch-10inches. Surface treatment: natural color, blackening, galvanizing, hot galvanizing, dacromet. Packing: 25 kg in bulk and 36 cases in pallets. Or according to customer requirements. Heavy external hexagonal bolts application: It is suitable for fixing heavy loads on…
High strength galvanized bolt is galvanized, so what are their advantages? Hot dip galvanizing is also used to prevent corrosion on the surface of screw, bolt and nut. High strength galvanized bolt has better corrosion resistance than galvanized screw, but the cost is higher, and high strength structure is not suitable for hot dip galvanizing….
High strength Dacromet bolt is treated by Dacromet, so what are the advantages? 1. Superior corrosion resistance. Unetched galvanized coatings are usually corroded by rainbow colored film with thickness of 1-3 micron for 20 hours in salt spray test. The corrosion resistance of Dacromet treated metal surface is about 10 times higher than that of…
Ultra-long bolts are usually constructed by the method of torque-one-axis force. They are divided into two stages: initial and final twisting. Torque coefficient refers to the coefficient between the torque and the axial force of the bolts in the process of tightening. Generally speaking, it has a great relationship with the friction coefficient of the…
In this article we want to show you how to use the Brake Caliper Rewind Tool from KROFtools. Most cars have two types of brake calipers: with and without floating pistons. This is because the calipers without floating pistons are usually integrated with the handbrake or other more sophisticated braking systems. This means you’ll need…
We all know that the airbag is a safety element for vehicles and one of the main protection systems, both for the driver and for passengers. But do you know how it works? What are airbags? Airbags, as the name implies, are “air bags” that fill up quickly when sensors detect any impact on either…
In this article we want to show you how to use the The Bearing Bush Removal and Insertion Kit: How to use. It is true that this kit is perfect for bearings but does not only. It is possible to use this kit in bearings, bellblocks, hydraulic bellblocks and even sleeves encased in shafts. It…