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  • J6470 - ISO Certificate Request

    This tester does not come with an ISO accredited certificate. However, it does come with a certificate traceable to NIST. This information is in the catalog. https://catalog.protoindustrial.com/Ind...

  • J5426H- socket dimensions

    The dimensional the outer diameter of that socket are D 27.7 +0.1/-0.2. See picture below

  • J000AA - Certificate of conformity

    Attached, you'll find the J000AA Certificate of conformity

  • J6476 and J6478 - distance between the mounting holes

    The distance between the holes is 1 1/2 inches and where the tester curves its 2 3/8 inches.  

  • J07529L - Needs the inside dimension

    The inside hex depth is 2.25'' for the J07529L

  • J364-T45- hole distance

    The hola distance of the J364-T45 is 0.750 inches from centerline to centerline

  • J7336H - Hole diameter inside the socket

    J7336H diameter of the hole inside the socket past the hex of the J7336H is 1 inch

  • How to compare Proto tools?

    In order to get a comparison among specific tools, please get in contact with our support team via phone at 1-800-800-TOOL (8665).   Also, you can email our support team at inquiry@sbdinc.com.

  • Torque rating for Universal Joints & Hex Bits Impact Sockets

    All our sockets are rated to ASME specs. It would be a safety liability to instruct anyone to go beyond ASME values.  See reference of one example below. **ASME stamped means they have been thorou...

  • Where can I get information on Challenger mechanics' tools?

    The Challenger brand of mechanics' tools is offered through the Stanley Proto business. They can be contacted at www.stanleyproto.com or 1-800-952-7226. They can help information on this product line.