NP
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 836012 sales@npfasteners.com
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NORTHERN PRECISION LTD
Accreditations Northern Precision Ltd operate a quality management system in accordance with ISO 9001:2008. The ISO 9001:2008 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.
Registered in England & Wales Company number 3275391
V.A.T Registration number GB 684 1384 17
NP
NORTHERN PRECISION LTD
Specialist Fasteners for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 836012
Tel:
Fax:
sales@npfasteners.com
Quality
Service
Reliability
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Testing Method
Hardened bushing with sufficient wall thickness to withstand applied compression load.
Head Dia. + 1.6mm
Test panel.
Applied Load from compression gauge.
Compression rig base.
Push-out testing of Self-Clinching Flush Head Pins 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 stud during testing. The bushing bore must be centred on the head of the stud.
Performance
Body dia.
3mm
4mm
5mm
Fastener Type
NFH (ZI)
NFH (A2)
NFH (AL)
NFH (ZI)
NFH (A2)
NFH (ZI)
NFH (A2)
NFH (AL)
NFH (ZI)
NFH (A2)
NFH (ZI)
NFH (A2)
NFH (AL)
NFH (ZI)
NFH (A2)
Test sheet material
Aluminium
Steel
Aluminium
Steel
Aluminium
Steel
Installation (kN)
12.5
12.5
10.5
14.5
14.5
19.9
22.4
14.5
28.5
26.9
24.3
24.4
15.0
33.8
33.5
Pushout (N)
610
600
580
820
810
970
970
780
1780
1750
1080
1075
890
2050
2040
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.
Anvil Dimensions
C +0.10
5.44
4.90
6.93
A +0.05
4.10
3.10
5.10
Pin dia.
4mm
3mm
5mm
B +0.05
4.19
3.61
5.61
Countersunk hole style anvil for 1.52mm or less.
Hole style anvil for 1.53mm and over panel thickness.
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 prepared hole in the panel and then locate the fastener in the anvil, ensuring that you are using the appropriate anvil type for the panel thickness like in the diagram.   With the panel held level, apply a parallel squeezing force until the head is installed flush to the panel surface. 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.
√  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
Electro Zinc Plated Steel (ZI) parts are suitable for installation in ductile panels with a maximum recommended hardness of 80 HRB. 300 Series Stainless Steel (A2) parts are suitable for installation in ductile panels with a maximum recommended hardness of 70 HRB. Aluminium (AL) parts are suitable for installation in ductile panels with a maximum recommended hardness of 50 HRB.
Part Number Examples
Part number is made up as follows: (Type)-(Diameter)-(Length)-(Material/Finish code) For example: NFH-3MM-10-ZI (Flush Head Pin-3.0mm diameter-10mm long-electro zinc plated steel) NFH-4MM-15-A2 (Flush Head Pin-4.0mm diameter-15mm long-stainless steel) NFH-5MM-20-AL (Flush Head Pin-5.0mm diameter-20mm long-aluminium)
RoHS REACH COMPLIANT
Info
Self-Clinching Flush Head Pins provide a strong captivated pilot pin or pivot point in thin panels. Utilising a special proven castellated clinch feature, this fastener has excellent push-out characteristics as well as good resistance to side loadings, whilst providing a flush finish on the underside of the panel, meaning that minimal surface finishing is required after installation. Like all self clinching fasteners they are installed using a parallel squeezing action, so require access to both sides of the panel.   Flush Head Pins are available in a range of diameters and lengths, manufactured from electro zinc plated through- hardened steel, 300 series stainless steel, aluminium and are suitable for installation in ductile panels with a recommended maximum hardness of 80 HRB for steel parts, 70 HRB for 300 series stainless steel parts and 50 HRB for aluminium parts.
Installation
Self Clinching Flush Head Pilot Pins
Type NFH
SELF-CLINCHING FLUSH HEAD PINS
self-clinching flush head pins ANVIL ANVIL ANVIL ANVIL PUNCH PUNCH PUNCH PUNCH
A
Length of pin +3.2mm min.
B
2.38mm min.
ANVIL
A
Length of pin +3.2mm min.
90°
C
B
2.38mm min.