13A Inch Reading Double Square 50109

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” with Graduated Blade only

Contact Starrett


  • With Graduated Blade Only
  • 4R Graduation – Quick Reading 8ths, 16ths, 32nds, 64ths


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


    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


    2D Dimensional Drawing (PDF)



    27.49 kb

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    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