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NP - Self Clinching Fasteners - Flush Nuts
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Self Clinching Flush Nuts provide a strong reusable female thread in panels that are too thin to be conventionally tapped.
Utilising a special proven clinch feature, they have excellent torque out and push out characteristics whilst providing a flush finish on both sides of the panel.
Like all self clinching fasteners they are installed using a parallel squeezing action so require access to both sides of the panel.
Available in Stainless Steel as standard and Steel to order in threads sizes M2.5 - M6.
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Thread
& Pitch |
Material
Code |
Minimum Sheet
Thickness |
H
Max |
d
Max |
F
± 0.2 |
Hole Size
in panel
+0.08 -0.0 |
Min C/L to
edge of panel |
M2.5 x 0.45* |
1 |
1.5 |
1.5 |
4.35 |
4.8 |
4.4 |
6.0 |
2 |
2.4 |
2.3 |
M3 x 0.5 |
1 |
1.5 |
1.5 |
4.35 |
4.8 |
4.4 |
6.0 |
2 |
2.4 |
2.3 |
Alternative
M3 x 0.5 |
1 |
1.5 |
1.5 |
5.35 |
6.4 |
5.4 |
6.5 |
2 |
2.4 |
2.3 |
M3.5 x 0.6 |
1 |
1.5 |
1.5 |
5.35 |
6.4 |
5.4 |
6.5 |
2 |
2.4 |
2.3 |
M4 x 0.7 |
1 |
1.5 |
1.5 |
7.35 |
7.9 |
7.4 |
7.2 |
2 |
2.4 |
2.3 |
M5 x 0.8 |
1 |
1.5 |
1.5 |
7.85 |
8.7 |
7.9 |
8.0 |
2 |
2.4 |
2.3 |
M6 x 1.0* |
3 |
3.2 |
3.1 |
8.70 |
9.5 |
8.75 |
8.8 |
*Check for availability before specifying
Material |
Part Number Examples |
300 Series Stainless Steel (A2)
Stainless Steel parts are suitable for use in
sheets with a maximum hardness of 70HRB.
Stainless Steel parts will not usually install
successfully into Stainless Steel panels.
(See Self clinch technical notes page for further details) |
Type | Thread | Material Code | Finish
i.e. : NF-M3-1-A2
(Flush Nut-M3-1mm Min Sheet-Stainless Steel) |
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Installation Guide
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First punch or drill the correct size hole. DO NOT deburr the hole prior to installation as this will remove material required during the clinching process. It is preferable to install the fastener from the side of the panel with the burring or blow through.
Place the fastener in the hole like in the diagram above making sure the part is seated squarely.
Apply a parallel squeezing force until the hexagon head is fully embedded flush with the top of the panel. Please note that the shank of the fastener must not protrude below the bottom of the panel.
When installing Self Clinching fasteners, please pay attention to the minimum hole centerline to edge and parent material hardness limitations.
For special applications or if you are unsure of any aspect about the usage or installation of this fastener, give our sales office a call and we will do our best to offer you a solution or give advice on your application.
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Performance Data
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Thread Size |
Material
Code |
Test Panel |
Axial Tensile
Strength (kN) |
Maximum Screw
Tightening
Torque (Nm) |
Installation
(kN) |
Pushout
(N) |
M2.5 |
1 |
Aluminium |
0.69 |
0.24 |
8.4 |
884 |
2 |
1 |
Steel |
13.2 |
886 |
2 |
M3 |
1 |
Aluminium |
0.87 |
0.36 |
8.6 |
897 |
2 |
1 |
Steel |
13.4 |
903 |
2 |
ALT M3 |
1 |
Aluminium |
0.96 |
0.45 |
8.9 |
1012 |
2 |
1 |
Steel |
15.5 |
1018 |
2 |
M3.5 |
1 |
Aluminium |
0.96 |
0.45 |
8.9 |
1012 |
2 |
1 |
Steel |
15.5 |
1018 |
2 |
M4 |
1 |
Aluminium |
1.00 |
0.59 |
8.9 |
1058 |
2 |
1 |
Steel |
17.5 |
1063 |
2 |
M5 |
1 |
Aluminium |
1.30 |
0.87 |
11.1 |
1076 |
2 |
1 |
Steel |
18.7 |
1084 |
2 |
M6 |
3 |
Aluminium |
4.50 |
3.75 |
15.6 |
2847 |
Cold Rolled Steel |
20.3 |
3722 |
The above data is based on average values obtained in a test environment. Variations in hole size, panel material and installation will effect performance. It is recommended that you carry out your own performance tests in the actual application. Contact our sales department who will be happy to supply samples free of charge.
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