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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 Size – Length of Blade* Inch
1-1/2" 3"
4-1/2" 6"
12" 24"
36"
mm 40 75
115 150
300 600
910
Length of Beam Inch
1-1/2" 2-3/8" 3 -1/2"
4-5/16" 7"
12-5/16" 20"
mm 40 60 90
110
180 310
500
Squares Only Cat. No. 20-1 1/2 20-3
20-4 1/2 20-6
EDP
50128 50130 50132 50134
20-6 W/SLC‡ 66899 20-12
50136
20-12 W/SLC‡ 66900 20-24
20-36**
Larger squares can be furnished; quoted on application. * 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. † Rack-type case.
‡ Includes redemption card for Standard Letter of Certification (SLC).
50140 50142
Case Only Cat. No. 916 951 918
919
20ZZ-12 20ZZ-24†
20ZZ-36† EDP
55152 55153 55154
55155
55156 55158
55159 20-3
55 MASTER PRECISION SQUARES WITH BEVELED EDGES 1-1/2-6"/40-150MM
These 55 Hardened Steel Squares are the same as the 20 Squares described above, except that the blades are beveled on both edges of each side, which provides an excellent visual line contact with the work.
55 Master Precision Squares with beveled edges Size – Length of Blade* Inch
1-1/2" 3"
4-1/2" 6"
mm 40 75
115 150
Length of Beam Inch
1-1/2" 2-3/8" 3-1/2"
4-5/16"
mm 40 60 90
110 * Length of blade from the inner edge of the beam to the end of the blade.
Squares Only Cat. No.
EDP
55-1 1/2 50277 55-3
50279
55-4 1/2 50281 55-6
50283
Case Only Cat. No. 916 951 918 919
EDP
55152 55153 55154 55155
55-3
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