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20-4-1/2 Starrett Master Precision Square 4* Blade 3-1/2* Beam
 
20-4-1/2 Starrett Master Precision Square 4* Blade 3-1/2* Beam
    Quantity in Basket: None
    Price: $240.44
     
     
    Quantity:
     

    20-4 1/2
    Starrett Master Precision Square


    The finest precision-checking squares – not graduated . Squareness accuracy to .0001"
    (0 .0025mm) every 6" (150mm) These hardened steel squares are used
    when extreme accuracy is required . The beams and blades are hardened, ground
    and lapped to ensure parallelism and straightness . The beam is grooved at the
    inner corner for clearance of burr or dirt . Made of high quality tool steel, with the
    finest of craftsmanship throughout

    20 Master Precision Squares
    Squares Only
    Size – Length of Blade*
    Length of Beam
    Cat . No
    Inch
    mm
    Inch
    mm
    20-1 1/2
    1-1/2"
    40
    1-1/2"
    40
    20-3
    3"
    75
    2-3/8"
    60
    20-4 1/2
    4-1/2"
    115
    3 -1/2"
    90
    20-6
    6"
    150
    4-5/16"
    110
    20-12
    12"
    300
    7"
    180
    20-24
    24"
    600
    12-5/16"
    310
    20-36**
    36"
    910
    20"
    20-36**

    * Length of blade from the inner edge of the beam to the end of the blade .
    ** 36" (910mm) and larger size squares have special screws to secure the blade to the beam .