Bolt and bolt types for commonly used flat bearings

Flat head: A new design that can replace the round head and the mushroom head. The head has a low diameter and the outer circumference of the head is connected to the high edge of the characteristic.
       It makes it play a role in driving high-intensity torque, and it has a slight difference from the head shape in terms of head shape.
Round head: It is the most commonly used head type in the past.
Top column head: The standard flat dome head has a smaller diameter than the round head, but it is relatively high due to the groove depth. The smaller diameter makes it work.
       For increased pressure in small areas, it can be tightly combined with the flange and the raised surface. It is set for ensuring concentration.
       The drilling molds are headed and they can be successfully applied to the holes in the borehole.
Dome wide-brimmed head: The most common application in electrical appliances due to the incision under the head and the weakening of the wear on the wires.
       In the tape recorder, the medium and low head type provides a more attractive design type with its fuller bearing.
Large round head: Also known as the elliptical top wide-side head, it is a low-profile, cleverly designed large-diameter head. When the combined tolerance of the additional action allows
       When used, it can be used to cover metal plate holes with larger diameters. It is also recommended to use flat head instead.
Slotted head type: This is a creative anti-loose head type. Once the combination is not easy to remove, it can be used with a standard standard screwdriver.
       Startup. This simple design can usually solve the cost problem in the combination, increase the production quantity, and create a manufacturing process.
       Create amazing economic benefits.
Hexagon socket head: A type of joint with a wrench head height and a hexagonal head size. The hexagon is completely formed by the reverse hole mold.
       Type, there is a distinct depression at the top of the head.
Hexagon socket hole Huasi head: such as the standard hexagon socket head type, but at the same time there is a Huasi surface on the head base to protect the assembly.
       Complete, to avoid damage to the wrench. Sometimes the role of things is far more important than the appearance.
Hex head : This is a standard type of torque applied to the hex head, which trims the sharp corners to near tolerance
       Features. Can be recommended for general commercial use, can also be applied to various standard modes and various thread diameters.
       The second process makes it more expensive than the general hexagonal hole.
The socket head: There is a deep hexagonal socket in the head of the cylinder. The common Cap Screw with high strength socket head. Deeper bearing
       The hole causes the high torque to act on the knot.
Twelve o'clock: The high cylinder head is covered with twelve outer points, and the Huasi surface is subjected to the load applied to the knot. Due to the high design
       The torque of the degree is convenient, so it is often used for high-strength knots.
Plum head: A medium-height hexagonal leaflet head with a slatted face. Its design consists of a straight face perpendicular to the Huasi face, torque
       The bearing surface transmits torque in the circularly protruding part (in the leaflet). This design utilizes the external drive system to the highest degree.
       The torque can be used to the extreme. The transmission of high torque does not change the head itself.

Commonly used tapered bearing bolts and bolt types

Flat top countersunk head - Standard angle is 80~82 degrees, used for fasteners with tight joints on the surface. The bearing surface can provide good middle
       Heart.
Flat round head - full name "Oval Countersunk", this head shape is similar to the standard flat-top counters, but it is more widely used.
       A round, tidy upper surface is also more attractive in design.
Xiaopingding countersunk head - the same as the standard flat-top countersunk head, the flat head is the same, the head angle is 80~82 degrees, but the head part is smaller by 1/3.
       For simple products or especially short lengths. To be more detailed, it is used in standard countersinks and is very suitable for
       Close fittings.
Flat top countersunk (100 degrees buried) – This special flat-top countersunk screw is being applied to surfaces that require close fitting, it is recommended
       Used on soft materials to break down pressure on larger and less angled surfaces, especially for aluminum, soft plastics, etc.

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