A timber spike is designed to pin two or more wooden members together. The semi-cone pointed fetter drive threads speed up installation because they can be driven into the wood like a nail.

The oversized, low profile head will provide a large bearing surface, thus preventing the bolt from pulling into the wood. Lugs or fins on the underside of the head bite into the wood and prevent the installed spike from turning. A timber bolt, which is the same bolt only with national coarse thread, is also available.

Manufacturing

Portland Bolt manufactures timber spikes from 1/2″ diameter through 1-1/2″ diameter in most ASTM, AASHTO, and SAE specifications. Special request for heading, thread type and finishes can be accommodated.

Standard Thread Length

The minimum thread length shall be equal to half the nominal spike length plus 1/2″.

Timber Spike Dimensions

Click table to show drawing
Bolt Diameter D F H TPI D R
Body Diameter Head Diameter Head Height
Max
12 0.515 112 14 6 0.0520 0.0232
58 0.642 11516 516 5 0.0647 0.0236
34 0.768 214 38 412 0.0731 0.023
78 0.895 258 716 4 0.0837 0.023
1 1.022 278 12 312
118 1.149 278 12 312
114 1.277 278 12 312
138 1.404 278 12 312
112 1.531 278 12 312