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
Reliability
Self-Clinching Fasteners
Broaching Fasteners
Arnold & Shinjo Fasteners
Rivet Bushes
Rivet Nuts
Weld Fasteners
Cage Nuts
Blind Rivets
Inserts for Plastics
Inserts for Stone, Solid
Materials, Composites &
Sandwich Panels
Crown-Nuts
Fast-Con
Installation Equipment
Turned & Cold Formed
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
Reduced Flush Head Studs
Thin Panel Non-Flush Studs
High Strength Studs
Thin Panel High Strength
Studs
Flush Head Pins
Flush Head Tapered Pins
Concealed Head Studs
Through & Blind Standoffs
Grounding Standoffs
Thin Panel Standoffs
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
Material & Finish
Electro Zinc Plated Carbon 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.
Part Number Examples
Part number is made up as follows:
(Type)-(Thread)-(Length)-(Material/Finish code)
For example:
NFHL-M3-10-ZI (Reduced Head Stud-M3-10mm long-electro zinc plated carbon steel)
NFHL-M4-12-A2 (Reduced Head Stud-M4-12mm long-stainless steel)
Use part designation NFHLD to specify a dog-point thread lead-in (special order).
Info
Self-Clinching Reduced Head Studs provide strong low displacement captivated male threads in thin panels and are
suitable for installation closer to the edge of the panel than normal Flush Head Studs.
Utilising a special proven castellated clinch feature, this fastener has good torque-out, pull-through and push-out
characteristics 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.
Reduced Head Studs are available in a range of thread sizes and lengths, manufactured from electro zinc plated
steel, 300 series stainless steel and are suitable for installation in ductile steel and aluminium panels with a
recommended maximum hardness of 80 HRB for steel parts and 70 HRB for 300 series stainless steel parts.
Reduced Head Studs can also be supplied with a dog-point thread lead-in to aid component assembly.
Dimensional
Thread size
D
±0.40
Maximum
mating hole
H
Max.
Min. sheet
thickness
Min CL to
edge of panel
2.10
2.80
M2.5 x 0.45
Hole size
+0.08 -0.0
2.90
3.15
1.00
2.50
2.10
3.30
M3 x 0.5
3.40
3.65
1.00
3.00
2.30
3.80
M3.5 x 0.6
3.90
4.15
1.00
3.50
2.40
4.30
M4 x 0.7
4.40
4.65
1.00
4.00
2.70
5.60
M5 x 0.8
5.40
2.70
1.00
5.00
Thread size
Lengths (L) ±0.40
M2.5 x 0.45
M3 x 0.5
M3.5 x 0.6
M4 x 0.7
M5 x 0.8
6
6
6
6
-
8
8
8
8
8
10
10
10
10
10
12
12
12
12
12
15
15
15
15
15
18
18
18
18
18
-
20
20
20
20
-
25
25
25
25
-
-
30
30
30
-
-
-
35
35
Type NFHL
SELF-CLINCHING
REDUCED HEAD STUDS
