< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
Metal sheet preparation in accordance with shank
Hole diameter |
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M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Metric dimensions - FE, PE or RE type: |
4.0 |
4.0 |
5.0 |
6.0 |
6.0 |
7.0 |
9.0 |
11.0 |
13.0 |
17.0 |
20.0 |
23.0 |
Inch dimensions - FP type: |
4.25 |
4.25 |
4.25 |
4.75 |
5.4 |
6.4 |
8.75 |
10.5 |
14.0 |
17.0 |
18.5 |
19.6 |
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dimensions: mm (tolerance provided in the data sheets) |
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Preparation Process |
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- Punching
- Drilling
- Laser cutting
- Water jet cutting |
Strain-hardened zone
Cutting zone
Rupture zone |
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These four processes can be used to create the hole destined to receive the NUTFIX™. Quality of preparation is, however, of overriding importance in guaranteeing optimal crimping which will result in high mechanical resistance. Use of a precision-sharpened punch is, for example, recommended - in order to limit strain-hardening of the hole and minimize the rupture zone. |
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< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
Preparation of the workpiece to be assembled
Hole Ø T2 for all shanks
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Ø M |
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Ø T2 min |
2.1 |
2.6 |
3.1 |
3.6 |
4.1 |
5.1 |
6.1 |
8.1 |
10.1 |
12.1 |
14.1 |
16.1 |
Ø T2 max |
3.0 |
3.25 |
4.0 |
4.75 |
5.0 |
6.0 |
7.5 |
9.5 |
11.5 |
14.0 |
16.0 |
18.5 |
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< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
Recommendation on the location of holes |
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In order to guarantee optimal crimping, and to avoid any deformation of the sheet liable to adversely affect the NUTFIX™ bond, compliance is recommended with the distances (shown in table next page) between:
- two punched holes (Dt)
- the edge of the sheet and the punching axis (Db)
- the punching axis and the start of the bend radius (Dp) |
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Ø M |
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Ø T |
mm |
4.25 |
4.25 |
4.25 |
4.75 |
5.4 |
6.4 |
8.75 |
10.5 |
14 |
17 |
18.5 |
19.6 |
inch |
.167 |
.167 |
.167 |
.187 |
.213 |
.213 |
.345 |
.414 |
.552 |
.670 |
.729 |
.772 |
Dt |
mm |
10.5 |
10.5 |
10.5 |
11.2 |
12.3 |
13.5 |
17.4 |
20.2 |
27.5 |
33 |
36 |
38 |
inch |
.414 |
.414 |
.414 |
.441 |
.485 |
.532 |
.686 |
.796 |
1.083 |
1.300 |
1.418 |
1.497 |
Db |
mm |
6.25 |
6.25 |
6.25 |
6.4 |
6.9 |
7.1 |
8.6 |
9.7 |
13.5 |
16 |
17.5 |
18.5 |
inch |
.246 |
.246 |
.246 |
.213 |
.272 |
.280 |
.339 |
.382 |
.532 |
.630 |
.689 |
.729 |
Dp
(ep = 3 mm) |
mm |
6.7 |
6.7 |
6.7 |
6.9 |
7.2 |
7.7 |
8.8 |
9.7 |
11.5 |
13 |
13.7 |
14.3 |
inch |
.264 |
.264 |
.264 |
.272 |
.284 |
.303 |
.347 |
.382 |
.453 |
.512 |
.540 |
.563 |
Dp (3 < ep < 6 mm) |
mm |
- |
- |
- |
- |
11.7 |
12.2 |
13.3 |
14.2 |
16 |
17.5 |
18.2 |
18.8 |
inch |
- |
- |
- |
- |
.461 |
.481 |
.524 |
.559 |
.630 |
.689 |
.717 |
.740 |
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Ø M |
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Ø T |
4 |
4 |
5 |
6 |
6 |
7 |
9 |
11 |
13 |
17 |
20 |
23 |
Dt |
10.1 |
10.1 |
11.6 |
13.2 |
13.2 |
14.4 |
17.7 |
21 |
26 |
33 |
37.5 |
42 |
Db |
6.1 |
6.1 |
6.6 |
7.2 |
7.2 |
7.4 |
8.7 |
10 |
13 |
16 |
18.5 |
20 |
Dp (ep = 3 mm) |
6.5 |
6.5 |
7 |
7.5 |
7.5 |
8 |
9 |
10 |
11 |
13 |
14.5 |
16 |
Dp (3 < ep < 6 mm) |
- |
- |
- |
12 |
12 |
12.5 |
13.5 |
14.5 |
15.5 |
17.5 |
19 |
20.5 |
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Ø M |
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Ø T |
4.35 |
4.35 |
4.35 |
- |
7.35 |
7.9 |
8.75 |
- |
- |
- |
- |
- |
Dt |
10.5 |
10.5 |
10.5 |
- |
14.8 |
16.0 |
17.4 |
- |
- |
- |
- |
- |
Db |
6.25 |
6.25 |
6.25 |
- |
7.6 |
8.0 |
8.6 |
- |
- |
- |
- |
- |
Dp (ep = 3 mm) |
6.7 |
6.7 |
6.7 |
- |
8.2 |
8.5 |
8.8 |
- |
- |
- |
- |
- |
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Ø M |
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Ø T |
4 |
4 |
5 |
6 |
6 |
7 |
9 |
11 |
13 |
16 |
- |
- |
Dt |
7 |
7 |
8.3 |
9.6 |
9.6 |
10.7 |
13.4 |
16 |
19.5 |
23.8 |
- |
- |
Db |
3 |
3 |
3.3 |
3.6 |
3.6 |
3.7 |
4.4 |
5 |
6.5 |
7.8 |
- |
- |
Dp (ep = 3 mm) |
6.5 |
6.5 |
7 |
7.5 |
7.5 |
8 |
9 |
10 |
11 |
12.5 |
- |
- |
Dp (3 < ep < 6 mm) |
- |
- |
- |
12 |
12 |
12.5 |
13.5 |
14.5 |
15.5 |
17 |
- |
- |
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Because the values depend on the grade of the workpiece material, they are given as guidelines only. For applications requiring installation beyond the values recommended above, LA CLUSIENNE-CLUFIX offers custom-made products. |
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< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
NUTFIX™ installation process |
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NUTFIX™ fitting orientation
To guarantee optimal installation and resistance of NUTFIX™, it is recommended to always crimp the nuts from the side:
- of the punch entry (hole created by punching);
- of the burr (hole created by drilling) ;
- of the source (Laser or water jet cutting), especially for significant thicknesses. |
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Installation stroke (except FE and RE types)
Setting of the bottom of the press stroke position must be precise, so as to ensure total insertion whilst stopping before the shank protrudes from the metal sheet.
Depending on the grade and thickness of the metal sheet, it may be wise to respect a time delay at the stroke end in order to maintain pressure on the component so as to eliminate any springback.

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< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
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NUTFIX™ Materials |
Metal sheet material |
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M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Steel |
Steel |
min max |
1050 1750 |
1050 1750 |
1050 1750 |
1200 2000 |
1650 2700 |
1950 3300 |
2250 3800 |
2700 4300 |
3900 6800 |
5550 8600 |
7500 12000 |
9000 15000 |
Stainless Steel or 316L |
Stainless Steel |
min max |
1050 1750 |
1050 1750 |
1050 1750 |
1200 2000 |
1650 2700 |
1950 3300 |
2250 3800 |
2700 4300 |
3900 6800 |
5550 8600 |
7500 12000 |
9000 15000 |
HR Stainless Steel |
Strain-hardened Stainless Steel |
min max |
2500 4450 |
2500 4450 |
2500 4450 |
3200 4600 |
3900 5000 |
4300 5500 |
4900 6300 |
5600 7300 |
- |
- |
- |
- |
Aluminium |
Aluminium |
min max |
600 1000 |
600 1000 |
600 1000 |
700 1200 |
950 1600 |
1100 1950 |
1350 2250 |
1600 2550 |
2300 4000 |
3300 5100 |
4500 7200 |
5400 9000 |
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NUTFIX™ Materials |
Metal sheet material |
|
M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Steel |
Steel |
min max |
1000 1350 |
1000 1350 |
1250 1550 |
- |
1500 2000 |
1800 2600 |
1900 3200 |
2200 4000 |
3500 6500 |
5200 8000 |
7000 12000 |
8000 15000 |
Stainless Steel or 316L |
Stainless Steel |
min max |
1000 1350 |
1000 1350 |
1250 1550 |
- |
1500 2000 |
1800 2600 |
1900 3200 |
2200 4000 |
3500 6500 |
5200 8000 |
7000 12000 |
8000 15000 |
HR Stainless Steel |
Strain-hardened Stainless Steel |
min max |
2000 3500 |
2000 3500 |
2500 4000 |
- |
3000 4500 |
3500 5300 |
3800 6200 |
4500 7500 |
- |
- |
- |
- |
Aluminium |
Aluminium |
min max |
600 850 |
600 850 |
750 950 |
- |
900 1200 |
1000 1550 |
1100 1900 |
1300 2400 |
2100 3900 |
3100 4800 |
4200 7200 |
4800 9000 |
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NUTFIX™ Materials |
Metal sheet material |
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M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Steel |
Steel |
min max |
1000 1350 |
1000 1350 |
1000 1350 |
- |
1500 2600 |
1800 3000 |
1900 3200 |
- |
- |
- |
- |
- |
Stainless Steel or 316L |
Stainless Steel |
min max |
1000 1350 |
1000 1350 |
1000 1350 |
- |
1500 2600 |
1800 3000 |
1900 3200 |
- |
- |
- |
- |
- |
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NUTFIX™ Materials |
Metal sheet material |
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M 2 |
M 2.5 |
M 3 |
M 3.5 |
M 4 |
M 5 |
M 6 |
M 8 |
M 10 |
M 12 |
M 14 |
M 16 |
Steel |
Steel |
min max |
- |
500 900 |
500 900 |
- |
700 1400 |
1000 1800 |
1500 2200 |
2000 3000 |
2800 3500 |
3450 4300 |
- |
- |
Stainless Steel or 316L |
Stainless Steel |
min max |
- |
500 900 |
500 900 |
- |
700 1400 |
1000 1800 |
1500 2200 |
2000 3000 |
2800 3500 |
3450 4300 |
- |
- |
Aluminium |
Aluminium |
min max |
- |
300 550 |
300 550 |
- |
400 800 |
600 1000 |
900 1300 |
1200 1800 |
1650 2100 |
2100 2550 |
- |
- |
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These values are given as guidelines only, and the wide range of crimping forces can be explained by the variation of mechanical characteristics among supports (depending on the grade of the steel, stainless steel and aluminium) and by the dimensional features of the hole.
Requirement: The shank length must always be less than the thickness of the metal sheet to enable crimping in the best possible conditions and to avoid crushing the NUTFIX™ threads. Only RE type shank lengths need be in excess of the thickness of the workpiece.
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< Metal sheet preparation - Workpiece preparation - Recommendation - Installation - Setting - Tooling >
Specific installation tools - RE type NUTFIX™
To guarantee optimal crimping, it is necessary to use a special punch whose shape is adapted to that of the RE type shank (see illustration below). The dimensions for this type of punch are provided in the RE NUTFIX™ data sheets.
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Perfectly flush finish obtained:
- without preparation for workpieces of low and average hardness
- by creating a chamfer in the metal sheet for extremely hard materials (see data sheets)
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Slight residual protrusion on extremely hard workpieces
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Specific installation tools - PE type NUTFIX™
For metal sheet thicknesses that are equal to or below 1 mm, use of a die with chamfer is recommended (see illustration below) so that the material can flow towards the groove and thus ensure NUTFIX™ resistance. The dimensions for this chamfer are provided in the PE NUTFIX™ data sheets.
This tooling also enables complete burial of the PE NUTFIX™ head in the metal sheet. A perfectly flush finish is thus obtained for all metal sheet thicknesses up to 1.2 mm. |

Ø M |
C |
= M5 |
0.6 |
M6 ? M8 |
0.9 |
M10 ? M12 |
1.2 |
> M12 |
1.5 |
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Download NUTFIX™ Technical Data pdf
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