Contact us
You can contact us using any
of the methods below.
Unit 3 Durham Lane
Armthorpe
Doncaster
South Yorkshire DN3 3FE
England
+44 (0)1302 836010
+44 (0)1302 831555
sales@npfasteners.com
All rights reserved
© Northern Precision Ltd.
NORTHERN PRECISION LTD
Accreditations
Northern Precision Ltd operate a quality management
system in accordance with ISO 9001.
The ISO 9001 standard is recognised worldwide and
you can be assured of the benefits of working with a
certified company knowing that our management
systems are constantly assessed and improved.
Regulatory
RoHS|WEEE Compliance
REACH Compliance
Conflict minerals
statement
Environmental Policy
Opening Hours
Mon - Fri 08:00 - 17:00
Registered in England & Wales
Company number 3275391
V.A.T Registration number
GB 684 1384 17
NORTHERN PRECISION LTD
Specialist Fasteners
for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 831555
Tel:
Fax:
sales@npfasteners.com
Quality
Service
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Self-Clinching Fasteners
Broaching Fasteners
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Rivet Bushes
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Inserts for Stone, Solid
Materials, Composites &
Sandwich Panels
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Installation Equipment
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special parts made to order
Bespoke fastener design &
development
Fastener & Application
testing
Technical support
ISO 9001
RoHS|WEEE Compliance
REACH Compliance
Conflict minerals
Environmental Policy
SERVICES & SUPPORT
Clinch Nuts
Flush Nuts
Blind Nuts
Miniature Nuts
Nyloc Nuts
Locking Nuts
Floating Nuts
Flush Head Studs
Flush Head Studs for
Stainless Steel
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Studs
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Through & Blind Standoffs
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Quick Release Standoffs
Keylock Standoffs
Concealed Head Standoffs
Flush Panel Screw Assembly
Panel Fasteners
Phillips Head Panel Fasteners
Low-Profile Panel Fasteners
Plunger Assembly
Self-Clinching fastener
Do’s and Don’ts
Self-Clinching fastener
problem solving guides
Self-Clinch in harder panels
Performance & Testing Method
All performance figures are averages obtained over a range of installations and should be used as an indicator
only. Panel material, hole preparation, installation tooling and method can affect part performance. We always
recommend that you carry out your own tests in the actual application. Please call our sales team and we will be
happy to provide you with samples as well as offering technical assistance.
Push-out
(N)
2250
Installation
(kN)
13
Push-out
(N)
1800
Type
NTL2 | NSL2
Installation
(kN)
18
Steel test panel
Aluminium test panel
Hardened bushing with
sufficient wall thickness
to withstand applied
compression load.
Head Dia.
+ 1.6mm
Test panel.
Applied Load from
compression gauge.
Load should be applied to the
shank of the fastener only.
Compression rig base.
Push-out testing of Self-Clinching Plunger Assemblies should be performed by the gradual application of a load
as shown above.
Bushing height should be sufficient to allow free downward movement of the fastener during testing. The
bushing bore must be centred on the body of the fastener.
Installation
Anvil Dimensions
B
±0.5
14.86
A
±0.05
13.21
ANVIL
Pin Dia.
+2.0mm
PUNCH
Max. pin
extension
First punch or drill the correct size hole. Do not deburr or chamfer
the hole prior to installation as this will remove material required
during the clinching process. It is preferable to install the fastener
from the punch side of the panel.
Place the fastener in the recessed anvil with the shank facing up like in the diagram above. Locate the panel
mounting hole over the shank ensuring the panel is held level.
Apply a parallel squeezing force until the body shoulder is seated against the panel with no serrations visible.
Do not over squeeze the fastener into the panel as this will result in panel deformation.
When installing Self-Clinching fasteners, please pay attention to the minimum hole centreline to edge and
parent material hardness limitations.
Do not remove any extra material or
chamfer the hole as this could result in
improper installation or reduced
performance.
HRB (ROCKWELL HARDNESS B SCALE)
Ensure that you are installing into a
panel that is ductile and at or below the
published maximum recommended
hardness for the fastener.
Ensure that attention is paid to the
minimum hole centreline to edge
dimension for each fastener. Installing
too close to an edge or bend could result
in improper installation or reduced
performance. Minimum centreline to
edge dimensions shown for each
fastener apply to one edge only. If this
distance is applied on multiple sides
there will be significant panel distortion
unless the panel edges are supported
during installation.
Material & Finish
Electro Nickel plated Carbon Steel (CN) parts are suitable for installation in ductile panels
with a maximum recommended hardness of 80 HRB.
Part Number Examples
Part number is made up as follows:
(Type)-(Plunger code)-(Material/Finish Code)
For example:
NTL2-04-4-CN (Locking Plunger Assembly-1.53mm minimum sheet thickness-electro
nickel plated steel)
NSL2-04-4-CN (Non-Locking Plunger Assembly-1.53mm minimum sheet thickness-electro
nickel plated steel)
Info
Self-Clinching Plunger Assemblies provide a captivated spring loaded positioning pin for use in thin sheet metal
components such as draw slides and consoles. When fully retracted the plunger pin sits below the underside of the
panel and features a twist to lockout design (type NTL2), so the plunger pin can be locked in a fully retracted
position. It can also be supplied without the lockout feature (type NSL2).
Utilising a special proven clinch feature, this fastener has excellent pull-out and push-out characteristics whilst
providing a flush finish 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.
Self-Clinching Plunger Assemblies are manufactured from electro nickel plated carbon steel and are suitable for
installation in ductile panels with a recommended maximum hardness of 80 HRB.
Dimensional Data
Self-Clinching fastener
Do’s & Don’ts
Self-Clinching fastener
problem solving guides
Downloadable
Data Sheet
Back
Type NTL2|NSL2
SELF-CLINCHING
PLUNGER ASSEMBLY
