Dual thread

Dual Thread Flange Head & Cylinder Head
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Under head thread/drive thread.

Bulk structural wood screws, also suitable For fastening over-rafter insulation.

Can also be used for many other applications in timber-frame construction thanks to its high extraction resistance.

Structural Wood Screw Flange Head Double Threaded                    Dual thread screw from ASP Ltd

Flange Head                                           Cylinder Head

Size Drive Box Quantity Size Drive Box Quantity
8.0 x 165 TX40 50 8.0 x 225 TX40 50
8.0 x 195 TX40 50 8.0 x 235 TX40 50
8.0 x 225 TX40 50 8.0 x 255 TX40 50
8.0 x 235 TX40 50 8.0 x 275 TX40 50
8.0 x 255 TX40 50 8.0 x 302 TX40 50
8.0 x 275 TX40 50 8.0 x 335 TX40 50
8.0 x 302 TX40 50 8.0 x 365 TX40 50
8.0 x 335 TX40 50 8.0 x 397 TX40 50
8.0 x 365 TX40 50 8.0 x 435 TX40 50
8.0 x 397 TX40 50
8.0 x 435 TX40 50
8.0 x 472 TX40 50