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Np
Self Clinching Fasteners

Clinch Nuts

Flush Nuts

Blind Clinch Nuts

Mini Clinch Nuts

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Locking Clinch Nuts

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NP - Self Clinching Fasteners - Clinch Nuts

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.

Like all self clinching fasteners they are installed using a parallel squeezing action so require access to both sides of the panel.

Available in Steel, Stainless Steel and Aluminium in threads M2 - M10.

Thread
& Pitch

Material
Code

Minimum
Sheet Thickness

S
Max

C
Max

D
± 0.25

H
± 0.25

Hole Size
in Panel
+ 0.08 - 0.0

Min C/L to
edge of panel

M2 x 0.4*

0

0.8

0.77

4.22

6.30

1.5

4.25

4.8

1

1.0

0.97

2

1.4

1.38

M2.5 x 0.45*

0

0.8

0.77

4.22

6.30

1.5

4.25

4.8

1

1.0

0.97

2

1.4

1.38

M3 x 0.5

0

0.8

0.77

4.22

6.3

1.5

4.25

4.8

1

1.0

0.97

2

1.4

1.38

Alternative 
M3 x 0.5*

0

0.8

0.77

4.73

7.1

1.7

4.75

5.6

1

1.0

0.97

2

1.4

1.37

M3.5 x 0.6

0

0.8

0.77

4.73

7.1

1.5

4.75

5.6

1

1.0

0.97

2

1.4

1.38

M4 x 0.7

0

0.8

0.77

5.38

7.9

2.0

5.4

6.9

1

1.0

0.97

2

1.4

1.38

M5 x 0.8

0

0.8

0.77

6.38

8.7

2.0

6.4

7.1

1

1.0

0.97

2

1.4

1.38

M6 x 1.0

0

1.2

1.15

8.72

11.05

4.08

8.75

8.6

1

1.4

1.38

2

2.3

2.21

M8 x 1.25

1

1.4

1.38

10.47

12.65

5.47

10.5

9.7

2

2.3

2.21

M10 x 1.50

1

2.3

2.21

13.97

17.35

7.48

14.00

13.5

2

3.2

3.05

Alternative
M10 x 1.50*

1

2.3

2.21

12.65

14.30

6.72

12.70

11.00

2

3.1

3.05

3

6.1

5.97

M12 x 1.75*

1

3.1

3.05

16.90

20.55

8.50

17.00

16.0

2

6.1

5.97

*Made to order

Materials

Finishes

Carbon Steel
300 Series Stainless Steel (A2)
400 Series Stainless Steel (400) - (Check for availability) Aluminium (AL) (Special Order)

Bright Zinc / Trivalent Clear Passivate (ZI)
Other finishes available to order

The following installation panel material hardness
limitations apply when installing Self Clinching Nuts.

Steel Clinch Nuts: 80HRB Max
Aluminium Clinch Nuts 50HRB Max
300 series Stainless Clinch Nuts: 70HRB max
400 series Stainless Clinch Nuts 90HRB Max
(A special punch/anvil is recommendedfor a proper
installation - call our sales office for further information)

Part Number Examples

Type | Thread | Material Code | Finish
i.e. : NS-M3-1-ZI
(Clinch Nut-M3-1mm Min Sheet-Steel-BZP)
i.e. : NS-M4-2-A2
(Clinch Nut-M4-1.4mm Min-Sheet-Stainless Steel)

Installation Guide for 300 Series

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.

Installation Guide for 400 Series

Thread

Recommended Anvil Dimensions (mm)

A ±0.05

B Nom

C +0.03

R Max

M3

5.05

6.63

0.23*

0.08

M3.5

5.54

7.11

0.23*

0.08

M4

6.17

7.75

0.23*

0.08

M5

7.34

8.89

0.23*

0.08

*It is recommended that the anvil is replaced when the C dimension is reduced to 0.13mm due to tooling wear to avoid performance degredation.

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. Minimise local work hardening by punching holes with tooling in good condition.

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 could result in the threads being crushed.

A special punch/pilot pin combination to align the nut and a special staking ring anvil to aid displacing material into the clinch feature is highly recommended to achieve a proper installation.

A flat punch and anvil can be used but optimum installation/performance may not be achieved.

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.

Performance Data

Fastener

Thread
Size

Shank
Code

Test Panel

Installation
(kN)

Pushout
(N)

Torque Out
(Nm)

Type NS

Steel (ZI)
Stainless (A2)

M2

M2.5

M3

0

Aluminium

6.70 - 9.0

285

0.90

1

402

1.15

2

745

1.45

0

Cold Rolled Steel

11.0 - 16.0

474

1.46

1

555

1.68

2

1014

2.10

NS 400 Series

M3

0

304 Stainless

13.0 - 23.0

590

1.60

1

730

1.90

2

1300

2.00

Type NS

Steel (ZI)
Stainless (A2)

M3.5

0

Aluminium

11.0 - 14.0

285

1.84

1

410

1.90

2

838

2.55

0

Cold Rolled Steel

13.0 - 27.0

484

1.84

1

574

2.29

2

1213

2.31

Type NS

Steel (ZI)
Stainless (A2)

M4

0

Aluminium

11.0 - 14.0

301

2.31

1

467

2.68

2

982

4.12

0

Cold Rolled Steel

17.5 - 28.0

495

2.90

1

649

4.20

2

1247

5.00

NS 400 Series

M4

0

304 Stainless

21.0 - 33.0

640

3.40

1

810

4.10

2

1613

5.16

Type NS

Steel (ZI)
Stainless (A2)

M5

0

Aluminium

11.0 - 16.0

302

3.10

1

475

3.55

2

854

5.70

0

Cold Rolled Steel

17.5 - 39.5

531

3.50

1

798

4.56

2

1120

6.91

NS 400 Series

M5

0

304 Stainless

26.1 - 42.3

812

3.90

1

1031

5.10

2

1779

6.82

Type NS

Steel (ZI)
Stainless (A2)

M6

0

Aluminium

17.5 - 33.8

981

7.95

1

1579

10.31

2

1612

14.02

0

Cold Rolled Steel

26.2 - 37.1

1377

13.24

1

1771

17.49

2

1774

17.62

NS 400 Series

M6

1

304 Stainless

39.6 - 49.2

2058

17.24

Type NS

Steel (ZI)
Stainless (A2)

M8

1

Aluminium

17.8 - 33,9

1573

13.61

2

1582

18.24

1

Cold Rolled Steel

26.3 - 37.3

1877

18.81

2

1891

20.42

Type NS

Steel (ZI)
Stainless (A2)

M10

1

Aluminium

22.1 - 36.8

1758

32.58

2

1763

32.76

1

Cold Rolled Steel

31.3 - 50.4

2017

36.53

2

2023

36.76

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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