11H-12-4R 12" Combination Square with Square Head 50055

The Starrett 12" Combination Square with Square Head features a reversible lock bolt, scriber, spirit level, and hardened steel, photo-engraved blade with regular This product also includes a cast iron head with black wrinkle finish. 12", 4R Grad, Regular Blade

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  • Reversible lock bolt, scriber, spirit level
  • Hardened steel, machine divided blade
  • Regular Finish Blade
  • Cast Iron Heads with Black Wrinkle Finish


  • Blade Length (in): 12"
  • Blade Finish: Regular
  • Graduation Type: 4R
  • Graduations: 8ths, 16ths, Quick Reading 32nds, 64ths
  • Head Finish: Black Wrinkle
  • Head Material: Cast Iron
  • Head Types: Square
  • Number of Pieces: 2


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    30•LOCK BOLT, NEW #11PT990061
    40••BOLT, LOCK #11-1222658-01
    60••NUT, .231-2801083-01
    70••SPRING, .260X.310X.563X.025X 501086-01
    80•PLUG, EXPANSION17816-01
    90•BUSHING, AWL #11-601087-1/21
    100•VIAL, .281X1 5/1613263-01
    110•NAMEPLATE, STARRETT05838-01
    120•AWL SUB ASSEMBLY07659-C1
    130BLADE, #4 GRADB12-4R1


    Combination Square Guide (Form 955)

    Document stating the introduction, assembly, and tips on the Combination Square

    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.