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Northern Precision Ltd is an ISO9001 accredited Company. Northern Precision Ltd is an ISO9001 accredited Company.
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 sales@npfasteners.com
Northern Precision Ltd is an ISO9001 accredited Company. Northern Precision Ltd is an ISO9001 accredited Company.
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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 approved.
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Performance & Testing Method
Push-out (N)
1350
1800
2250
Installation (kN)
11
13
14
Push-out (N)
1050
1350
1800
Thread size
M3
M4
M5
Installation (kN)
13
17
18
Steel test panel
Aluminium test panel
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.
Compression rig base.
Push-out testing of Self-Clinching Panel Fasteners 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.
Hardened bushing with sufficient wall thickness to withstand applied compression load.
Body Dia. + 1.6mm
Test panel.
Applied Load from compression gauge.
Load should be applied to the shank of the fastener only. For parts with an L1 dimension of 0.00 a solid gauge pin can be used. For L1 dimensions greater than 0.00 provision should be made for the thread protrusion.
Compression rig base.
Installation
B A
ANVIL
ANVIL PUNCH ANVIL PUNCH
Thread Major Dia. +2.0mm
PUNCH
Max. screw 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.
Anvil Dimensions
B ±0.5
11.05
8.76
11.05
A ±0.05
9.80
8.20
10.69
Thread size
M4
M3
M5
√
X
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.
X √ Min C/L to Edge Min C/L to Edge
Material & Finish
300 Series Stainless Steel (A2) parts are suitable for installation in ductile panels with a maximum recommended hardness of 70 HRB.
Part Number Examples
Part number is made up as follows: (Type)-(Thread)-(Screw length code)-(Material/Finish Code) For example: NPFP-M4-72-A2 (Phillips Head Panel Fastener-M4 thread-11.1mm screw length-stainless steel)
RoHS REACH COMPLIANT
Info
Self-Clinching Phillips Head Panel Fasteners provide a captivated spring loaded screw for use in thin sheet metal where panel to panel attachment is needed and subsequent access is required. They reduce loose components and so reduce the risk of loose hardware being lost or falling out and damaging internal components. Featuring a fully recessed head, actuation is by tool only. 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 Phillips Head Panel Fasteners are available in a range of thread sizes and screw lengths, manufactured from 300 series stainless steel, electro nickel plated carbon steel and are suitable for installation in ductile panels with a recommended maximum hardness of 70 HRB for stainless steel parts and 80 HRB for 300 steel parts.
Dimensional Data Self-Clinching fastener Do’s & Don’ts Self-Clinching fastener problem solving guides Downloadable Data Sheet Back
Self Clinching Phillips Head Panel Fasteners
Type NPFP
SELF-CLINCHING PHILLIPS HEAD PANEL FASTENERS
self-clinching phillips head panel fasteners