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NP - Self Clinching Fasteners - Blind Clinch Nuts
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Blind Self Clinching 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 installing flush on the underside of the panel.
The closed end 'Blind' feature of this fastener gives the added benefit of sealing the component / threads against foreign matter and against the potentially damaging incursion of extra long screws - especially useful in electronic components with a risk of shorting.
Like all self clinching fasteners they are installed using a parallel squeezing action so require access to both sides of the panel.
Available as standard in Steel & Stainless Steel with Aluminium available to special order and in threads sizes M3 - M5 with M6 available to special order.
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Thread
& Pitch |
Material
Code |
Hole Size
+ 0.8 - 0.0 |
Minimum
Panel
Thickness |
S
Max |
C
Max |
D
Max |
L1
Max |
L2
± 0.25 |
E
± 0.25 |
T
Min |
Min Distance
C/L to edge |
M3 x 0.5 |
1 |
4.25 |
1.0 |
0.97 |
4.22 |
3.84 |
8.5 |
9.6 |
6.35 |
5.3 |
5.2 |
2 |
1.40 |
1.38 |
M4 x 0.7 |
1 |
5.40 |
1.0 |
0.97 |
5.38 |
5.20 |
9.8 |
11.2 |
7.95 |
7.1 |
7.0 |
2 |
1.4 |
1.38 |
M5 x 0.8 |
1 |
6.40 |
1.0 |
0.97 |
6.38 |
6.02 |
9.8 |
11.2 |
8.75 |
7.1 |
6.7 |
2 |
1.4 |
1.38 |
M6 x 1.0* |
1 |
8.75 |
1.4 |
1.38 |
8.72 |
7.80 |
12.7 |
14.3 |
11.1 |
7.8 |
7.5 |
2 |
2.3 |
2.21 |
*Made to order
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Materials
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Finishes
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Carbon Steel
Aluminium (AL) (Special Order)
300 Series Stainless Steel (A2)
400 Series Stainless Steel (400) - (Special Order)
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Bright Zinc / Trivalent Clear Passivate (ZI)
Other finishes available to order
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The following installation panel material hardness
limitations apply when installing Self Clinching Blind Nuts.
Steel Blind Clinch Nuts: 80HRB Max
Aluminium Blind Clinch Nuts 50HRB Max
300 series Stainless Blind Clinch Nuts: 70HRB max
400 series Stainless Blind Clinch Nuts 90HRB Max
(A special punch/anvil is recommendedfor a proper
installation - call our sales office for further information)
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Part Number Examples |
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Type | Thread | Material Code | Finish
i.e. : NB-M3-1-ZI
(Blind Clinch Nut-M3-1mm Min Sheet Steel BZP)
i.e. : NB-M4-2-A2
(Blind Clinch Nut-M4-1.4mm 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 head is seated against the panel with no serrations visible. Do not over squeeze the fastener into the panel as this will result in the threads being crushed.
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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Fastener
Type |
Thread
Size |
Shank
Code |
Test
Panel |
Installation
(kN) |
Pushout
(N) |
Torque Out
(Nm) |
NB ZI
NB A |
M3 |
1 |
Aluminium |
7.0 - 9.5 |
442 |
1.39 |
2 |
748 |
1.48 |
1 |
Cold Rolled Steel |
11.0 - 14.5 |
558 |
1.53 |
2 |
1016 |
2.21 |
NB ZI
NB A2 |
M4 |
1 |
Aluminium |
9.0 - 13.0 |
496 |
2.78 |
2 |
972 |
4.09 |
1 |
Cold Rolled Steel |
15.0 - 21.5 |
598 |
3.39 |
2 |
1251 |
5.23 |
NB ZI
NB A2 |
M5 |
1 |
Aluminium |
9.5 - 14.5 |
499 |
2.87 |
2 |
1210 |
5.83 |
1 |
Cold Rolled Steel |
17.5 - 25.0 |
625 |
5.23 |
2 |
1419 |
6.94 |
NB ZI
NB A2
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M6 |
1 |
Aluminium |
17.0 - 20.0 |
1389 |
11.10 |
2 |
1409 |
11.60 |
1 |
Cold Rolled Steel |
25.0 - 28.0 |
1774 |
11.75 |
2 |
1789 |
12.06 |
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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