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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
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© 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
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statement
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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
Reliability
PRESS
PUNCH
PRESS
PUNCH
NON-HEADED INSERT
FULLY INSTALLED
HEADED INSERT
FULLY INSTALLED
Hole Depth = L
+ min. 2 thread
pitches
1°
inc.
Hole
size
Min. wall
thickness
PRESS
PUNCH
Punch should have
polished face to
allow part to rotate
during installation
Material & Finish
Brass (B)
Stainless Steel (A2)
Part Number Examples
Part number is made up as follows:
(Type)-(Thread)-(Material code)
For example:
BI-M4-B (Press Insert for brittle thermosetting plastics-M4-brass)
HBI-M5-A2 (Press Insert for brittle thermosetting plastics-M5-stainless steel)
Downloadable Data Sheet
Back
Installation
Dimensional
Thread
Size
M2 x 0.4
M2.5 x 0.45
M3 x 0.5
M3.5 x 0.6
M4 x 0.7
M5 x 0.8
M6 x 1.0
M8 x 1.25
M10 x 1.5
Hole Size
+0.10
3.1
3.8
3.8
4.6
5.4
6.2
7.8
9.3
11.6
Min. wall
thickness
1.6
2.0
2.0
2.5
2.5
2.5
2.8
3.8
5.0
H
4.8
5.5
5.5
6.4
7.1
7.9
9.5
11.1
14.0
D
3.3
4.2
4.2
5.0
5.8
6.6
8.2
9.7
12.0
A
3.0
3.7
3.7
4.5
5.3
6.1
7.7
9.3
11.5
B
0.51
0.58
0.58
0.74
0.89
1.07
1.32
1.32
1.57
L
4.1
5.3
5.3
6.3
7.4
8.3
9.2
9.2
9.2
Info
Post moulded inserts can offer significant benefits over mould-in inserts such as a reduction of in place cost, no
secondary operation to clean flash residue from threads, fewer rejects due to dislodged inserts and ease of
installation.
Press Inserts for brittle thermosetting plastics are available in a range of thread sizes, in headed and non-headed
variants, are manufactured from brass and stainless steel and are suitable for installation in hard thermosetting
plastics by simply pressing in to a pre-prepared hole. The three helical knurl bands cut into the hole wall to lock the
insert in place. This insert rotates as it is installed, so a polished punch face is recommended.
PRESS INSERTS FOR
BRITTLE THERMOSET
PLASTICS
