3.5 Inch, 3/8th Diameter Socket Head Bolt. The threaded section covers 1-7/8" inch section of the bolt.

To tighten these bolts you will require a 5/16" Allen key or you can use our specially designed Ergo Wrench.

  • HOW TO ATTACH A CLIMBING HOLD TO A PLYWOOD WALL - Click Here
  • All bolt-on holds/sets require socket head type bolts, except for the Classic Footholds Set which requires countersunk head bolts.
  • All bolts Uncarved Block sells are imperial 3/8" diameter with UNC threads.
  • Unless otherwise stated, t-nuts are not included with holds or sets.
  • Any items shown in pictures other than holds are to show scale and are not included with purchase.
  • More information about hold colors click here.
  • Bolts optionally supplied with holds/sets are suited for 17-20 mm thick climbing walls, if you require longer bolts order these separately.
  • It is cheaper & faster to select random colours.

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