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Standard DIN7504 K A2 A4 Hex Flange Self Tapping Screw M4.2 M4.8 M5.5 M6.3
Description
DIN 7504 Self-drilling tapping screws are usually classified as self tapping screws and self tapping teeth. The tail of self drilling screws is different from that of ordinary screws. It is not a sharp tail, but like a drill bit. This tail can drill holes by itself.
Self Drilling screws are designed to be fitted without the need for a pre-drilled hole, and employs self tapping threads enabling installation in one operation. This variant has a hexagon head, so is designed to be driven in with a standard spanner or ratchet and socket. Only suitable for light applications such as aluminium ducting or 1mm steel. Heavier duty screws are available, please contact us for information.
MS/SS Self Drilling Screws offered by us have been designed having a unique structure which comprises flutes & drill point at the tip with wings as well. This structural configuration of these screws allows them to tap their own hole while application. They are completely suitable for tapping hole in wooden & metal structures with complete reliability. These screws are made using stainless steel and are provided with a coating of molten zinc. MS/SS Self Drilling Screws are available in different dimensional configurations at market leading rates for our respected clients.
Features:
Specification
Material | C1022 |
Type Head | Hex Head |
Thread | Fine thread |
Tail | Self-tapping, Self-drilling, reduced point, Type17, Fast Type |
Surface Treatment | White Zinc, Yellow Zinc, Ruspert, Dacroment |
Package | 500pcs/baox, 1000pcs/box, carton, w/o pallet or as customers'
special request. |
Size | 4.2mm-6.3mm |
Length | 19mm-127mm |
Washer | Single washer, EPDM bonded washer, PVC washer |
| d1 | 3.5 | 3.9 | 4.2 | 4.8 | 5.5 | 6.3 |
|---|---|---|---|---|---|---|
| d2 max | 8,3 | 8,3 | 8.8 | 10.5 | 11 | 13.5 |
| k max | 3,4 | 3,4 | 4.1 | 4.3 | 5.4 | 5.9 |
| s | 5,5 | 5,5 | 7 | 8 | 8 | 10 |
| Drill speed, rpm | - | - | - | - | - | - |
| Steel | 1800-2500 | 1800-2500 | 1800-2500 | 1800-2500 | 1000-1800 | 1000-1800 |
| Stainless steel | 1000-1500 | 1000-1500 | 1000-1500 | 1000-1500 | 600-1000 | 600-1000 |
| Max. torque, Nm | 2.8 | 3.8 | 4.7 | 6.9 | 10.4 | 16.9 |
| mag. sleeve/"/mm | 1/4” | 1/4” | 7 | 8 | 8 | 10 |
| L1 | 5 | 6 | 7 | 8 | 10 | 11 |
| For plate thickness | 0,7-2,25 | 0,7-2,4 | 1,75-3 | 1,75-4,4 | 1,75-5,25 | 2-6 |
DIN 7504 Self-drilling tapping screws
type: DIN7504N, DIN7504P, DIN7504K,DIN7504R,DIN7504O
The tail of the drilling tail screw is in the shape of drill tail or sharp tail, without auxiliary processing, it can directly drill, tap and lock on the setting materials and basic materials, thus greatly saving the construction time. Compared with ordinary screw, it has high tenacity and maintenance force, long time after combination and no loosening. It is easy to use safe drilling and tapping once.
Purpose: it is a kind of screw, which is mainly used to fix the colored steel tile of steel structure, and also can be used to fix the sheet material of simple building. It cannot be used for metal to metal bonding.
Material and model
There are two kinds of materials: Iron and stainless steel, among
which stainless steel is divided into many kinds of materials.
The models are: Φ 4.2 / Φ 4.8 / Φ 5.5 / Φ 6.3mm, and the specific length can be determined according to the requirements.
According to the different drilling tails, they can be divided
into:
Round head rice / Cross / plum blossom, countersunk head (flat
head) / rice / Cross / plum blossom, hexagonal flower head, round
head flower head (big flat head), trumpet head, etc
Mechanical performance requirements
Drill tail screw
1. Core hardness: Standard: hrc32-40
2. Surface hardness: Standard: hv600-700
3. Cemented layer: 4 × 10-6 × 10:0.05-0.18mm 8-12:0.10-0.23mm
14:0.15-0.28mm
