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
Dimensional
Material & Finish
Zinc Plated Carbon Steel + Dry Film Lubricant coating (MD) parts are suitable for installation in ductile panels with a maximum recommended hardness of 70 HRB. 300 Series Stainless Steel + Dry Film Lubricant coating (A2) parts are suitable for installation in ductile panels with a maximum recommended hardness of 70 HRB. Aluminium (AL) arts 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)-(Material code)-(Material/Finish code) For example: LCN-M3-1-MD (Locking Nut-M3-1.0mm min sheet thickness-zinc plated carbon steel plus Dry Film Lubricant coating) LCN-M4-2-A2 (Locking Nut-M4-1.4mm min sheet thickness-stainless steel plus Dry Film Lubricant coating) LCN-M5-2-AL (Locking Nut-M5-1.4mm min sheet thickness-aluminium)
RoHS REACH COMPLIANT
Info
Self-Clinching Locking Nuts provide strong female prevailing torque locking threads in panels that are too thin to be conventionally tapped.   Utilising a special proven clinch feature, this fastener has excellent torque-out and push-out characteristics whilst providing a flush finish on the underside of the panel. Featuring two symmetrically threaded jaws and a dry film lubricant coating to provide a strong and effective prevailing torque locking action to minimise the risk of loosening when under heavy usage.   Like all self clinching fasteners they are installed using a parallel squeezing action, so require access to both sides of the panel.   Locking Nuts are available in various thread sizes, manufactured from zinc plated steel and 300 series stainless steel plus a dry film lubricant coating and are suitable for installation in ductile steel and aluminium panels with a recommended maximum hardness of 70 HRB and aluminium with no dry film lubricant which are suitable for installation in ductile aluminium panels with a recommended maximum hardness of 50 HRB.
Thread Size
Material code
S Max.
Hole size +0.08 -0.0
C Max.
D Max.
Min sheet thickness
Min .CL to edge of panel
1
1.0
0.97
2
1.4
1.38
4.73
4.85
4.75
4.0
M3 x 0.5
1
1.0
0.97
2
1.4
1.38
6.73
6.20
6.76
5.2
M4 x 0.7
1
1.0
0.97
2
1.4
1.38
7.90
7.75
7.92
5.6
M5 x 0.8
H ±0.40
3.43
4.45
5.21
Max. prevailing locking torque Nm (guideline)
0.56
1.70
2.00
F Nom.
6.35
8.73
9.53
Self Clinching Locking Nuts
Type LCN
SELF-CLINCHING LOCKING NUTS
self-clinching locking nuts