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We generally stick to the theory “Quality Very first, Prestige Supreme”. We’ve been fully committed to furnishing our shoppers with competitively priced high quality solutions, prompt delivery and expert services for High definition Carbon Steel Stainless Steel Hex Socket Csk Flat Head Cap Machine Screw, Welcome to develop the perfectly and long standing enterprise relationships with our business to make a superb potential with each other. customers’ satisfaction is our eternal pursuit!
We generally stick to the theory “Quality Very first, Prestige Supreme”. We’ve been fully committed to furnishing our shoppers with competitively priced high quality solutions, prompt delivery and expert services for China Hex Csk Head Screw and Hexagonal Csk Head Cap Screw, With the development of the society and economy, our company will continue the “loyalty, dedication, efficiency, innovation” spirit of enterprise, and we’ll always adhere to the management idea of “would rather lose gold, do not lose customers heart”. We’ll serve the domestic and foreign businessmen with sincere dedication, and allow us to create bright future together with you!

What is hex socket countersunk head cap bolt?

Countersunk bolts are flat headed bolt fasteners with hex socket drive into the head. Countersunk bolts have a cone type neck with flat head, flat head hex socket bolts, flat head socket cap bolts are other alias of hex head bolts. Countersunk bolts dimensions are defined in both metric and imperials sizes with unified national coarse pitch(UNC), fined pitch (UNF), fixed pitch(UN) and ISO metric thread profile. These are produced across all material categories and ASTM specifications but most commonly produced under F568 grade 8.8, 10.9,12.9, F593, BS, EN, ISO3506-1, SS304, SS316,2205, etc.

Applications

On the surface of the mounting hole on the connecting piece, a 90-degree conical round socket is processed, and the head of the flat machine screw is in this round socket, which is flush with the surface of the connecting piece. Flat machine screws are also used in some occasions with round head flat machine screws. This kind of screw is more beautiful and is used in places where the surface can allow a little protrusion.

Most hex socket countersunk head cap bolts are used in places where the surface of the part cannot be raised after installation. There are two types of parts to be fastened. The thickness of the head, after the screw is tightened, a part of the screw thread still does not enter the threaded hole. In this case, the countersunk head screw can certainly be tightened.

The cone of the head of the countersunk head screw has a 90 ° cone angle. Usually, the apex angle of a newly purchased drill bit is 118 ° -120 °. Some untrained workers do not know this angle difference, and often use a 120 ° drill Reaming, which results in that the countersunk head screws are not strained when tightening the countersunk head screws, but a line at the bottom of the screw head, which is one of the reasons why the so-called hex socket countersunk head cap bolts cannot hold tight.

Precautions during use

1.The taper of the reaming hole should be 90 °. To guarantee it, it is better to be less than 90 °, not more than 90 °. This is a key trick.

2.If the thickness of the sheet metal is less than the thickness of the head of the countersunk head screw, you can change the smaller screw, or rather expand the hole smaller than expand the hole so that the diameter of the bottom hole becomes larger and the part is not tight.

3. If there are multiple hex socket countersunk head cap bolt holes on the part, be more precise during machining. Once the drill is crooked, it is difficult to see the assembly, but it can be tightened as long as the error is small, because when the screw is not very tight Large (about no more than 8mm), when there is an error in the hole distance, the screw head will be deformed due to force when tightened, or it will be tightened.

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We generally stick to the theory “Quality Very first, Prestige Supreme”. We’ve been fully committed to furnishing our shoppers with competitively priced high quality solutions, prompt delivery and expert services for High definition Carbon Steel Stainless Steel Hex Socket Csk Flat Head Cap Machine Screw, Welcome to develop the perfectly and long standing enterprise relationships with our business to make a superb potential with each other. customers’ satisfaction is our eternal pursuit!
High definition China Hex Csk Head Screw and Hexagonal Csk Head Cap Screw, With the development of the society and economy, our company will continue the “loyalty, dedication, efficiency, innovation” spirit of enterprise, and we’ll always adhere to the management idea of “would rather lose gold, do not lose customers heart”. We’ll serve the domestic and foreign businessmen with sincere dedication, and allow us to create bright future together with you!