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DIN 968
a) DIN 968 specifies the standard for cross-recessed pan head tapping screws with a collar. The screws are commonly available with two types of cross recess drives: Type H (Phillips) and Type Z (Pozidriv), both designed for easy installation and removal.
b) There are two types of thread ends specified in DIN 7970 (Tapping Screws): Type C, which features a cone point, and Type F, which has a flat end.
| Description | |
|---|---|
| Material | Stainless steel / Carbon steel |
| Type | Self tapping screw |
| Driving recess type | Cross recess type H (Phillips) with slot |
| Head Type | Round head with collar |
| Thread Type | Tapping screw thread DIN 7970 |
| Surface color | Clean finish / Zinc finish |
| Thread size / diameter | 3.00 to 12.00 |
| Type of end | Type C, cone end |
| Field of application | Automotive / Electronics / Furniture assembly |
| Drive variations | Hexalobular socket drive |
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DIN 933 / ISO 4017
a) DIN 933 refers to a standard for hexagon head bolts with full threads. These bolts are commonly used in mechanical and structural applications that require high strength and reliable fastening.
b) Typically made from carbon steel, stainless steel, or alloy steel. They are available with various surface finishes, such as zinc plating, hot-dip galvanizing, or black oxide, to improve corrosion resistance and enhance durability.
DIN 7984
a) Unlike DIN 912, DIN 7984 screws features a low-profile head and a hexagonal socket drive (Socket thin head cap screws) with metric thread ranging from size M3 to M24
b) DIN 7984 screws have a thinner head because they are designed to be countersunk, allowing them to sit flush with the material surface. However, this design may not provide the same torque transfer capacity as the thicker head of DIN 912 screws, which are designed to handle higher torque due to their thicker cylindrical head shape.
DIN 34800 External Hexalobular Drive Head Bolt With Small Flange
a) This bolt features an external hexalobular socket with a small flange, and is designed for applications requiring a high torque transfer with reduced risk of cam-out.
b) The star-shaped head allows for great torque transfer by distributing the load more evenly across the drive, compared to traditional drive systems like Phillips, Pozi or slotted.
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Hexalobular socket pan head screw
a) The screw head features a hexalobular socket, often referred to by the generic name “6 lobe”
b) The flat underside of the pan head distributes clamping force over a larger area compared to countersunk or round head screws.
c) Although there may be minor differences in dimensional tolerances or thread requirements, both DIN 7985 (German standard) and ISO 14583 (international standard) specify pan head screws.