20-4-1/2 Starrett Master Precision Square 4* Blade 3-1/2* Beam
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20-4-1/2 Starrett Master Precision Square 4* Blade 3-1/2* Beam

Code: 20-4-1-2

$290.47

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Product Description

•••••

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 .

 

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