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.
The SFK bulletin can be downloaded free in PDF format and free part drawings for these RoHS-compliant fasteners can be found in the PEM CAD Library from the PennEngineering website.
