Fastener permanently flush-mounts metal sheets to PCBs.
October 14, 2009 -
Featuring 2 separate clinch and knurl joining profiles, PEM® SpotFast® steel fastener (Type SFK) permanently joins metal sheets to PCBs or plastic panels and creates flush-attachment connection without protrusions on either side. It can also serve as pivot point, to allow top metal sheet to rotate freely. Available with various head sizes and diameters, RoHS compliant fastener can be used with metal sheets as thin as 0.8 mm with hardness of 80 or less on Rockwell B scale.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
PennEngineering® (Penn Engineering)
P.O. Box 1000
Danboro, PA, 18916
USA
Pem® Spotfast® Fastener Permanently Flush-Mounts Metal Sheets to PC Boards or Plastic Panels
The newest PEM® SpotFast® fastener permanently joins metal sheets to PC boards or plastic panels and creates a flush-attachment connection without protrusions on either side. These fasteners offer practical alternatives to riveting or adhesives and their rotational capability extends application potential with the fastener serving as a single flush-mounted pivot point.
The steel fasteners (Type SFK) install smooth with the top metal sheet and flush or sub-flush with the bottom panel. When used as a pivot point, the top metal sheet is captivated between the head of the fastener and the lower (non-rotating) panel, which allows the metal sheet to rotate freely.
The fastener's unique design featuring two separate clinch and knurl joining profiles holds the key. Squeezing the fastener into place using punch and anvil causes a cold-flow of the metal sheet material into the fastener's clinch profile and a broaching fit of the knurled end into the PC board or plastic panel. The result is permanent and flush attachment of sheet to board or panel.
Standard parts can install with minimal space requirements into metal sheets as thin as .031"/0.8mm with hardness of 80 or less on the Rockwell "B" scale. Various head sizes and diameters are available to suit application needs.
Detailed specifications (Bulletin SFK) and free part drawings (PEM CAD Library) for these RoHS-compliant fasteners can be accessed at www.pemnet.com
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