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.
Northern Precision Ltd is and ISO9001 accredited Company
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
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Installation Method & Performance
Performance
√  X
Do not remove any extra material or chamfer the hole as this could result in improper installation or reduced performance.
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
First prepare the specified hole in the panel.   Place the fastener in the panel and then locate in the anvil. Ensuring the panel is held level, apply a parallel squeezing force until the head of the fastener is seated against the panel. Do not over squeeze the fastener into the panel as this will result in panel deformation or damage. Broaching studs do not install flush (refer to E dimension).   When installing broaching studs, please pay attention to the minimum hole centreline to edge limitations. 
HRB (ROCKWELL HARDNESS B SCALE) Ensure that you are installing into a panel that is at or below the published maximum recommended hardness for the fastener.
E ±0.08
4.10
3.10
Thread code
M4
M3
Anvil Dimensions
All performance figures are averages obtained over a range of installations and should be used for guidance 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 ANVIL PUNCH PUNCH
E
L dimension min.
5.10
M5
Installation (kN)
1.7
1.8
1.9
Push-out (N)
280
350
400
Torque-out (Nm)
0.8
1.8
1.9
Test Sheet Material
1.6mm FR4 Epoxy Laminate
1.6mm FR4 Epoxy Laminate
1.6mm FR4 Epoxy Laminate
Thread code
M3
M4
M5
Max. nut tightening torque (Nm)
0.45
1.6
2.1
Material & Finish
Electro Tin Plated Phosphor Bronze (ET) Maximum recommended panel hardness: 55HRB
Part Number Examples
Part number is made up as follows: (Type)-(Thread code)-(Length)-(Material/Finish code) For example: CBFH-M4-10-ET (Broaching Stud-M4-10mm long-electro tin plated phosphor bronze)
RoHS REACH COMPLIANT
Dimensional
Thread size
M3 x 0.5
M4 x 0.7
Hole size +0.08
3.00
4.20
B Max.
1.65
1.65
A ±0.13
0.51
0.51
C Max.(1)
2.30
2.30
Min. panel thickness
1.53
1.53
D ±0.25
4.58
5.74
M5 x 0.8
5.00
1.65
Min. CL to edge of panel
3.80
5.10
5.30
0.51
2.30
1.53
6.60
Max. hole in attached parts
3.70
4.80
5.80
(1) Threads are gaugeable to within 2 pitches of this dimension.
Info
Broaching studs provide strong male threads in non-ductile materials such as printed circuit board, polycarbonate, acrylic, glass epoxy and resin laminate components as well as ductile panels with a maximum hardness of 55HRB. Featuring an axially knurled ring, the serrations are designed to cut into the panel material as it is installed, resulting in an interference fit that offers good torque-to-turn resistance and push-out performance. Installation is simple, prepare the specified hole and using a flat punch and appropriate anvil, apply a parallel squeezing force to press the part into the hole. When installing in printed circuit board, broaching studs are suitable for use in non-plated holes only. Available from stock in various metric thread sizes and lengths in electro tin plated phosphor bronze, broaching studs are suitable for installation in panels with a maximum hardness of 55HRB
Broaching Studs  for Printed Circuit Board
BROACHING STUDS
Available Lengths (L) ±0.25
6
8
10
12
15
18
20
broaching studs