13A Inch Reading Double Square 50109

13, 13M Double Squares with Hardened Blades
Reading Double Square, Inch, 4"

Starrett 13 squares are very popular with machinists, toolmakers, and patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square. 4" Satin Chrome Finish Graduated Blade.

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  • With Graduated Blade Only
  • 4R Graduation - Quick Reading 8ths, 16ths, 32nds, 64ths
  • Satin Chrome Finish


  • Made in America: Yes
  • Type: Double Square with Hardened Blade
  • Blade Length (in): 4"
  • Graduations: 32nds - 64ths
  • Material: Steel
  • Includes: With Graduated Blade Only


    2D Dimensional Drawing (PDF)



    27.49 kb
    Catalog 33 - Section 11 - Squares

    Invented by our founder, the combination square was our first product and today, our brand is considered to be the best available. This section offers a range of high quality solid squares, tri-squares specialty products and accessories that is especially broad and deep.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.

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      Member of Kit
      Item #DescriptionPart No.QtyInformation
      1•STOCK ASSEMBLY01406-11
      2••LOCK BOLT COMPLETE #13PT990210
      3•••BOLT, LOCK #11-4PT131361
      4•••NUT, .231-1824548-01
      5•••SPRING, .263X.313X.250X.025 X201085-1/21
      7BLADE, SQUAREB4-4R1

    California Proposition 65 Warning

      WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov