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© 2013 www.pemnet.com © 2013 Patent Pending. © 2013 www.pemnet.com © 2013 SFN Spinning Flare Nut 2 PEM ® Type SFN spinning flare nut is a one piece, flanged.

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Presentation on theme: "© 2013 www.pemnet.com © 2013 Patent Pending. © 2013 www.pemnet.com © 2013 SFN Spinning Flare Nut 2 PEM ® Type SFN spinning flare nut is a one piece, flanged."— Presentation transcript:

1 © © 2013 Patent Pending

2 © © 2013 SFN Spinning Flare Nut 2 PEM ® Type SFN spinning flare nut is a one piece, flanged hex nut that installs by simply pressing it into a properly sized, pre-punched embossed mounting hole. The nut is permanently captive and still spins freely in the sheet. This allows quick attachment to mating hardware, eliminating much of the need for loose fasteners. PEM ® SFN- Introduction Above the sheet, the part appears identical to standard flanged hex nuts, while on the other side, the part remains flush. The spinning flare nut eliminates loose hardware such as flange nuts. When used with a self-clinching stud, all loose hardware is eliminated from the applications.

3 © © 2013 SFN Spinning Flare Nut Opportunity: Loose hardware causes assembly issues as assembler needs to hold panel, nut and driver for the first nut. Spinning Flare Nut Solution: SFN spinning flare nut is a hexagonal flange nut that is loosely captivated and free to spin in the sheet. Key Benefits: Rotates freely in sheet It reduces assembly time and cost There is a reduction in loose hardware (electrical/electronic environment, legislation, design for manufacture) Installs into any sheet hardness Nut can be automatically assembled to the panel It can be used in conjunction with PEM ® Self-Clinch stud PEM ® SFN- Key Benefits Overview SFN Sample PanelsTrademark 3

4 © © 2013 SFN Spinning Flare Nut 4 PEM ® SFN- Catalog Offering Available in M5, M6 & M8 sizes for sheet thickness 1.0 & 1.5mm As needed, please contact our technical support at for your specific application

5 © © PEM ® SFN- Installation The PEM ® SFN range of products, will go to market with Pre-emboss of the panel as the default installation process. Characteristics of Pre-emboss: Emboss shape created in panel as first step. Could be part of the bracket stamping operation or as a stand-alone emboss press. Very simple PEMSERTER ® tapered flare tool for nut installation. Plating and coatings can be added after emboss stage – reduces risk of damage to coatings in area to be embossed. If your application requires installation into a flat sheet, please contact our technical support at as we have tooling options

6 © © PEM ® SFN- Installation Tooling & Animation SFN Spinning Flare Nut Animation of SFN installation is available online in the nut category at

7 © © PEM ® SFN- Performance Data SFN Spinning Flare Nut Regulatory compliance information is available in Technical Support section of the PennEngineering website.

8 © © 2013 SFN Spinning Flare Nut 8 Property Class: The design of SFN nuts meets or exceeds proof load requirements of Property Class 8 per ISO 898 Part 2, but because of their unique design they are not marked with a grade marking. Please contact our technical support at for your specific application Torque-Tension Behaviour: Because of the concave flange the effective friction radius for the nut face is larger than typical resulting in a larger than typical nut factor or K value. For joints in which the induced preload is critical, torque-tension studies simulating actual joint conditions are recommended to determine the appropriate tightening torque. Samples of type SFN nuts are available for testing. PEM ® SFN- Application Notes Design Intent SFN – Spinning Flare Nut M5M6M8 Nut Thread Engagement: Intent – failure of screw in thread Exceeds ratio 0.8D. Expected failure of screw in thread. Exceeds ratio 0.8D. Expected failure of screw in thread. Exceeds ratio 0.8D. Expected failure of screw in thread. Nut Proof Load Performance: Tensile load of 8.8 stud Meets proof load of 12,140NMeets proof load of 17,200NMeets proof load of 31,800N Nut Hardness: Does not exceed Vickers hardness (HV) 353. Symbols: Not marked as property class.

9 © SFN Spinning Flare Nut 9 ApplicationApplication OverviewOverview Benefit SFN Benefit Cost Comparison SFN Cost Comparison Assembly time reduction & cost Reduction in loose hardware Automated assembly of nut to bracket Improved performance Customer uses loose nuts to assemble supporting brackets. These range from 1.5 – 2.0mm steel both electroplated and KTL painted. This causes assembly issues as person needs to hold bracket, nut and driver for the first nut. Project to design a captive nut which is free to spin. PEM ® SFN- Solution – OEM Customer

10 © SFN Spinning Flare Nut 10 Assembly Rate $79 / hr = $ / second Process time saving : 5 seconds per nut Process Cost Saving : $ per nut (Highlighted in Red Text) Annual Assembly Process Cost Saving -23% 3 s 4 s 2 s 3 s 4 s 5 s 4 s 3 s PEM ® SFN- Solution - Process Cost Saving

11 © © SFN Spinning Flare Nut PEM ® SFN- Bulletin


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