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Self Clinching Fasteners

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Flush Head Studs

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Unthreaded Pins

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Through Standoffs

Blind Standoffs

Snaptop Standoffs

Keyhole Standoffs

Panel Fasteners

Low Profile Panel Fasteners

Broaching Panel Fasteners

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NP - Self Clinching Fasteners - Blind Standoffs

Blind Self Clinching Standoffs provide a strong torque resistant captivated female thread in a spacer configuration for thin panels applications.

This fastener installs fully flush from the back of the panel meaning that minimal surface finishing is required after installation. Utilising a proven Clinch feature, the hexagon head provides excellent torque out and push out resistance.

Available in Steel, Stainless Steel and Aluminium in thread sizes M3 - M5 in a range of lengths.

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

Thread
& Pitch

Hole Size
in Panel
+ 0.08 - 0.0

Min Sheet
Thickness

C
+ 0.0 - 0.13

E Nom

Min C/L to
edge of panel

Torque Out
Nm

Push Out
Nm

M3 x 0.5

4.22

1.02

4.20

4.8

6.0

2.63

1012

5.4M3 x 0.5
M3.5 x 0.6*

5.41

1.02

5.39

6.4

6.8

4.1

1879

M4 x 0.7

7.14

1.27

7.12

7.9

8.0

8.48

2517

M5 x 0.8

7.14

1.27

7.12

7.9

8.0

8.48

2517


Lengths

Thread Size

Length (L) ± 0.2

M3

-

6

8

10

12

14

16

18

20

22

25

5.4M3

5

6

8

10

12

14

16

18

20

22

25

M4

-

6

8

10

12

14

16

18

20

22

25

M5

-

-

-

10

12

14

16

18

20

22

25


Length (mm)

5

6

8

10

12

14

16

18

20

22

25

Blind Hole 'G' Dimension (Min)

3.2

4.0

5.0

6.5

9.5

*Special 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
Standoffs. Steel Clinch Standoffs: 80HRB Max,
300 series Stainless Steel Clinch Standoffs: 70HRB
Max, 400 series Stainless Steel Clinch Standoffs:
88HRB Max, Aluminium Clinch Standoffs 50HRB Max.

Part Number Examples

Type | Thread | Length | Finish
i.e. : NBSO-M3-10-ZI
(Blind Standoff - M3 x 10mm - Steel - BZP)
i.e. : NSO-5.4M3-20-A2
(Blind Standoff - M3 x 20mm - Stainless 5.4mm hole size)

Installation Guide

Thread Size

C Dim (Add 0.15mm)

M3

4.18

5.4M3

5.39

M4

7.10

M5

7.10

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 installed flush in 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.

Performance Data

Thread

Fastener
Material

Max Rec
Tightening
Torque for
Mating
Screw (Nm)

Test Panel

1.5mm Aluminium

1.5mm Steel

Installation
(kN)

Pushout
(N)

Torque
Out
(Nm)

Pull
Through
(N)

Installation
(kN)

Pushout
(N)

Torque
Out
(Nm)

Pull
Through
(N)

M3

Steel

0.55

4.9

710

1.24

1245

9.8

1000

2.15

1465

Stainless

0.44

4.9

710

1.24

996

9.8

1000

2.15

1172

Aluminium

0.33

4.9

710

1.24

747

*

*

*

*

5.4M3

Steel

0.55

7.6

1330

1.24

1245

14.7

1860

2.15

1465

Stainless

0.44

7.6

1330

1.24

996

14.7

1860

2.15

1172

Aluminium

0.33

7.6

1330

1.24

747

*

*

*

*

M3.5

Steel

0.91

7.6

1330

2.82

1375

14.7

1860

3.95

1690

Stainless

0.73

7.6

1330

2.82

1100

14.7

1860

3.95

1352

Aluminium

0.55

7.6

1330

2.82

825

*

*

*

*

M4

Steel

2.0

10.7

1780

5.08

2575

17.8

2490

8.47

3110

Stainless

1.6

10.7

1780

5.08

2060

17.8

2490

8.47

2488

Aluminium

1.2

10.7

1780

5.08

1545

*

*

*

*

M5

Steel

3.6

10.7

1780

5.08

2575

17.8

2490

8.47

3110

Stainless

2.88

10.7

1780

5.08

2060

17.8

2490

8.47

2488

Aluminium

2.16

10.7

1780

5.08

1545

*

*

*

*

* Aluminium Standoffs are not suitable for installation into steel panels.

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.

Note: Standoffs installed in sheets thinner than 1.5mm will have pull-through, pushout, and torque-out values at approximatley 80% of above figures.

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