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Aztec International S.A

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BImetal Steel Fasteners

Our bimetal fasteners are comprised of two types of steel. The drill-point and the first tapping threads of the screw are made out of either 1022 or 1035 carbon steel that is heat treated to guarantee exquisite drilling performance. The screw body including head section is formed from A2 stainless steel which is characterized by it’s excellent corrosion resistance.

The two metals are welded together and as a result they form a screw that has best of both worlds – great drilling capabilities and exceptional corrosion resistance. The screws are zinc-plated to protect carbon steel point from corrosion, making the screw visually undistinguishable from a standard zinc-plated carbon steel screw.

        Our fasteners can be powder coated in any colour.

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13 bimetals

screws for fixing metal to timber

Hexagonal head self drilling farmer screw with no.2 reduced drill point

FS-BI - 4.8 x L

Ø [mm] L [mm] A [mm] H [mm] Drilling capacity [mm] Washer Ø [mm]
4.8
35
8
5
1+1
14

FS-BI – 4,8 X L are hexagonal head farmer screws featuring bimetal construction – screw body is made out of A2 (304 M) stainless steel and the drill is made out of case hardened 1022 or 1035 carbon steel. Such construction provides drilling performance of carbon steel while retaining corrosion resistance of stainless steel. They are also zinc-plated to provide increased corrosion resistance. These screws are used for fastening metal sheets to timber supporting structures with or without a bonded washer.

Declaration of Performance

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Hexagonal head self drilling screw with reduced drill point for wood

KDF 1 4.8 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
4.8
35
1
≥14

screws for fixing metal to metal

Hexagonal head self drilling stitcher screw with reduced drill point

bi2 - 4.8 x L

Ø [mm] L [mm] A [mm] H [mm] Drilling capacity [mm] Washer Ø [mm]
4.8
20
8
5
1+1
14

BI2-4,8 X L are hexagonal head stitcher screws featuring bimetal construction – screw body is made out of A2 (304 M) stainless steel and the drill is made out of case hardened 1022 or 1035 carbon steel. Such construction provides drilling performance of carbon steel while retaining corrosion resistance of stainless steel. They are also zinc-plated to provide increased corrosion resistance. These screws are used for fastening two thin metal sheets together with or without a bonded washer.  

Declaration of Performance

1 203 KB

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Mushroom head self drilling screw with reduced drill point

KDT 1 4.8 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
4.8
20
1+1
≥10

Mushroom head self drilling screw with no. 2 drill point

KDT 2 5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
5.5
27
3
≥12
5.5
38
3
≥12

Hexagonal head self drilling screw with reduced drill point

KDH 1 4.8 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
4.8
20
1+1
≥14
4.8
28
1+1
≥14

Hexagonal head self drilling screw with no. 2 drill point

KDH 2 4.2 x L, 4.8 x L, 5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
4.2
16
3
–
4.8
25
3
≥14
5.5
27
3
≥14
7. KDH 2 4.2 x L, 4.8 x L, 5.5 x L — kopia

Hexagonal head self drilling screw with no. 3 drill point

KDH 3 5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
5.5
27
5
≥16
5.5
38
5
≥16
5.5
70
5
≥16
5.5
90
5
≥16
8. KDH 3 5.5 x L — kopia

Hexagonal head self drilling screw with no. 5 drill point

KDH 5 5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Washer Ø [mm]
5.5
45
12
≥16
5.5
80
12
≥16
9. KDH 5 5.5 x L — kopia

Sandwich panel hexagonal head self drilling screw with no. 3 drill point

KDHT 3 6.3/5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Panel range min [mm] Panel range max [mm] Washer Ø [mm]
6.3/5.5
55
5
15
24
≥16
6.3/5.5
72
5
22
41
≥16
6.3/5.5
89
5
30
60
≥16
6.3/5.5
105
5
35
75
≥16
6.3/5.5
122
5
32
91
≥16
6.3/5.5
142
5
42
111
≥16
6.3/5.5
157
5
47
126
≥16
6.3/5.5
177
5
67
146
≥16
6.3/5.5
195
5
85
164
≥16
6.3/5.5
215
5
85
184
≥16
6.3/5.5
235
5
125
205
≥16
6.3/5.5
260
5
150
229
≥16

Sandwich panel hexagonal head self drilling screw with no. 3 drill point

KDHT 5 6.3/5.5 x L

Ø [mm] L [mm] Drilling capacity [mm] Panel range min [mm] Panel range max [mm] Washer Ø [mm]
6.3/5.5
89
12
18
40
≥16
6.3/5.5
100
12
29
51
≥16
6.3/5.5
115
12
44
51
≥16
6.3/5.5
135
12
47
86
≥16
6.3/5.5
155
12
57
106
≥16
6.3/5.5
170
12
62
121
≥16
6.3/5.5
190
12
72
141
≥16
6.3/5.5
210
12
92
161
≥16
6.3/5.5
230
12
92
181
≥16