Permagrip® Screw Spike

-U.S. Patents 6,808,120 & 6,471,140

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-Easily driven into SQUARE HOLES where cut spikes have worked loose.

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-DRAMATIC increase in holding power.

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-UNIQUE tie-grabbing fins lock like claws to prevent "back out."

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-IDEAL for the TOUGHEST ENVIRONMENTS such as curves, switches, turnouts or bridges.

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Square Head Permagrip® Timber Screw Spike

2 2/3 Pitch Quad Lead Thread

Lewis Part: PGFSH

Square Head w/ Bevel Permagrip® Timber Spike

2 2/3 Pitch Quad Lead Thread

Lewis Part: PGBSH

Rectangle Head w/ Bevel Permagrip® Timber Screw Spike

2 2/3 Pitch Quad Lead Thread

Lewis Part: PGBRH

Permagrip®