> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Create Surface Plugs

Follow the steps below to plug cylindrical holes.

## Step 1: Import CAD and Drag into Part Input of the Surface Plug block

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_Masking-import-CAD.gif" />
</Frame>

## Step 2: Select the Cylindrical and Flushed Surfaces you would like to plug

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_Masking-Plug.gif" />
</Frame>

## Adjustable Inputs

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_Surface-Plug-1.png" />
</Frame>

Depth of the plug into the hole, measured from the flush surface.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_plug-depth.jpg" />
</Frame>

The thickness of the plug's cap is measured from the hole's flush surface.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_thickness-cap.jpg" />
</Frame>

This is the radial offset of the cap, not including the radius of the grip.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_radialoffset.jpg" />
</Frame>

This is the space between the final part and the mask surfaces.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_clearance-large.jpg" />
</Frame>

The Taper Angle is measured from the vertical axis. It occurs on all walls inside or outside the part.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_taperangle.jpg" />
</Frame>

The Resolution is the smallest feature nTop will recognize.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_resolutionpic.jpg" />
</Frame>

This adds a 1.5mm radial offset to the cap that aids with cap removal.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_applycap.jpg" />
</Frame>

This creates an undercut on all interior sharp edges to ensure full plunge depth.

<Frame>
  <img src="https://files.learn.ntop.com/lessons/how-to-create-surface-plugs/FG_11_edgeclear.jpg" />
</Frame>