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.

3D CAD Files / Exploded Parts Diagram
Product Testimonials
California Prop 65

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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

3D CAD Files / Exploded Parts Diagram

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Product Testimonials

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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