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 831555 sales@npfasteners.com
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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 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 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  OUR PRODUCT RANGE  SERVICES & SUPPORT  SELF-CLINCHING 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 fastenerDoís and Doníts  Self-Clinching fastener problem solving guides  Self-Clinch in harder panels Northern Precision Ltd YouTube Channel
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. 400 Series Stainless Steel (400) parts are suitable for installation in ductile panels with a maximum recommended hardness of 88 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)-(Thread or Thru-Hole code)-(Length)-(Material/Finish code) For example: NSO-M3-10-A2 (Thru-threaded standoff-M3 thread-10mm long-stainless steel) NSO-5.4M3-8-AL (Thru-threaded standoff-M3 thread (larger body)-8mm long-aluminium) NBSO-M4-12-ZI (Blind-threaded standoff-M4 thread-12mm long-electro zinc plated steel) NSO-43.1-6-A2 (Clearance-hole standoff-3.1mm dia.-6mm long-stainless steel)
RoHS REACH COMPLIANT
Info
Self-Clinching Standoffs provide strong captivated reusable female threads in a spacer format in panels as thin as 1.0mm. Utilising a hexagon head and a special proven clinch feature, this fastener has excellent 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.   Self-Clinching Standoffs are available in a range of thread sizes and lengths, in through-threaded, blind-threaded and clearance-hole styles. Manufactured from electro zinc plated carbon steel, 300 and 400 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, 88 HRB for 400 series stainless steel parts and 50 HRB for aluminium parts.
Dimensional
M2.5 | M3
5.4M3 | M3.5 | M4 | M5
43.1
63.1 | 63.6 | 83.6 | 84.1 | 85.1
B Dimension ±0.25
3
3
3
3
4
4
4
4
6
6
6
6
None
8
8
8
8
10
10
10
10
12
12
12
12
4
14
14
14
14
16
16
16
16
18
18
18
18
8
20
20
20
20
-
22
-
22
-
25
-
25
11
Min CL to edge of panel
6.00
6.00
6.80
6.80
8.00
8.00
6.00
Min. sheet thickness
1.00
1.00
1.00
1.00
1.27
1.27
1.00
Thread or thru-hole code
M2.5
M3
5.4M3
M3.5
M4
M5
43.1
6.80
1.00
63.1
6.80
1.00
63.6
8.00
1.27
83.6
8.00
1.27
84.1
D ±0.13
3.20
3.20
3.20
3.90
4.80
5.35
n/a
n/a
n/a
n/a
n/a
n/a
8.00
Thread size or thru-hole dia.
M2.5 x 0.45
M3 x 0.5
M3 x 0.5
M3.5 x 0.6
M4 x 0.7
M5 x 0.8
3.10
3.10
3.60
3.60
4.10
5.10
C +0 -0.13
4.20
4.20
5.39
5.39
7.12
7.12
4.20
5.39
5.39
7.12
7.12
7.12
1.27
Hole size +0.08 -0.0
4.22
4.22
5.41
5.41
7.14
7.14
4.22
5.41
5.41
7.14
7.14
7.14
85.1
E Nom.
4.80
4.80
6.40
6.40
7.90
7.90
4.80
6.40
6.40
7.90
7.90
7.90
Thru-thread or thru-hole code
Lengths (L) +0.05 -0.13
M2.5 | M3
5.4M3 | M3.5 | M4 | M5
G Dimension Min.
6
6
8
8
10
10
3.2
12
12
14
14
16
16
6.5
18
18
20
20
-
22
9.5
-
25
Blind thread code
Lengths (L) +0.05 -0.13
4
5
Self Clinching Through-Hole and Blind Standoffs
Type NSO & NBSO
SELF-CLINCHING STANDOFFS
self-clinching standoffs