Using CAD Technical Drawings and 3-D Models


Products with technical drawings and 3-D models

We have over 380,000 CAD models available across a variety of product lines.

The CAD symbol indicates 3-D models and technical drawings are available.


View a product's technical drawing or 3-D model

To find links to the CAD files, search for a product and click the part number. The CAD link appears below the part number.

For products with multiple specifications, you can view the CAD files either before or after you choose a specification (such as length or color).

Before Selection

After Selection



Download a technical drawing or 3-D model

After you click the CAD link, you will see a list of file format options for downloading to the right of the drawing. Select your preferred file format and click .


If you have Adobe Acrobat Reader you can view and save 3-D PDFs. This file format allows you to rotate the CAD model and view it from any angle.


Available file formats for technical drawings and 3-D models

We provide CAD file formats that popular CAD design software programs can open. 3-D models are native to Solidworks. Not all formats are available for all products. The PDF file format offers easy viewing and printing and is available for all products with CAD files.




Print a technical drawing



Troubleshoot CAD-related problems

CAD files are in metric instead of British/Imperial scale

Some of our models appear to be the wrong size because they are scaled in metric units rather than inches. This can be resolved in two ways:

    1. Import these images using metric units (mm).
    2. Enlarge the model by a factor of 25.4.

Downloading a file generates an error message or blank screen

The CAD program may be trying to automatically open the file instead of allowing it to download to your computer. You will need to change the file association settings on your computer. Removing these associations does not impair your ability to open these types of files with your CAD programs.

Changing file associations in Windows XP

    1. Double-click the My Computer icon on your desktop.
    2. Click Tools in the top toolbar.
    3. Click the Folder Options choice in the drop-down menu.
    4. Click the File Types tab on the Folder Options Properties window that pops up.
    5. Locate the file types (.sldrpt, .dwg, .stp, etc.).
    6. To remove the association, click on each file type and then click on the delete button.
    7. Click Apply. Click OK.
    8. Close and then open your browser.

Changing file associations in Windows 7

    1. Open the Start button.
    2. Click the Default Programs shortcut.
    3. Click the "Associate a file type with a specific program" option.
    4. Locate the file types (.sldrpt, .dwg, .stp, etc.).
    5. Click the Change Program button.
    6. Click the program you want to use to open the file. If the program doesn't appear, click the Browse button to find it.
    7. Click OK to set the file association.
    8. Close and then open your browser.

CAD Disclaimer

The 3-D CAD models and related information are provided for reference only. The CAD models do not contain any technical information other than what is readily observable, specified by industry standards or provided to us by our suppliers, and they are subject to change without notice. The dimensions and other technical specifications of our products may vary from those shown in the CAD models, due among other reasons to tolerances associated with manufacturing processes. Manufacturing tolerance information is considered proprietary by many of our suppliers and is not always provided to us. Thus tolerance information may not be reflected in the CAD models. Your use of the CAD models is at your own risk and you are solely responsible for any use you make or permit others to make of the CAD models. McMaster-Carr makes no representation or warranty (express or implied) with respect to the CAD models, including but not limited to the accuracy or completeness of product dimensions or any other technical specifications contained in or accompanying the CAD models, non-infringement of third party rights, and quality, suitability, fitness for purpose or title. McMaster-Carr may terminate or limit your access to the CAD models for any reason at any time.

The CAD models are being made available to help you decide whether to purchase products from us. You may download the CAD models and share them with others in your organization or with third parties acting on behalf of or rendering services to you or your organization (including your data center or cloud service providers), but only for purposes of deciding whether to purchase products from us or in order to develop design drawings and prototypes for use by you or your organization in connection with a decision regarding whether to purchase products from us. You shall not use a CAD model to engage in 3D printing or other fabrication of the object depicted in the CAD model for any other purpose. You shall not otherwise redistribute or make available the CAD models (or any design drawings or prototypes that incorporate them) to any third parties, including third parties in the business of selling products similar to the products sold by us.