Starrett No. C183 Protractor Head with Blade – Machinist Layout Tool – Original Box. C183 protractor head. Original Starrett box. Compatible with: Starrett combination square sets and standard blade systems.
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Please go by the pictures I don’t know the specific or proper definition for this particular little precision T square by Starrett company. What looks to be fairly old everything slides nice and easy could use a cleaning
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Rare
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Precision Steel Square, Material Stainless Steel, Angle 90 Degrees , Number of Pieces 1, Outside Dimensions 3 31/32 in x 2 31/32 in, Case Included No, Construction Stainless Steel, Squareness - Inch 0.001 in, With Wide Base No Machinist's Squares are used in visual checks of parts for squareness and to position one item perpendicular to another. True 90 Degrees angles inside and outside. Beams and blades are lapped for straightness and parallelism. Blade length is measured from inner edge of beam to end of blade.
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Specifically for sizing and gauge and probably marking applications I suspect ?. This tool has a much different finish than the later cross hatching /checkering. This pattern is much smoother than the later counter parts.
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Toolmaker estate find, New Unused, see photos for the best description, see other nice tools Starrett I’ve listed Thanks
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Up for sale is a Starrett Combination Square With Scribe & Level, 12" Scale No. 4 Very nice condition and the level works great. FAST SHIPPING
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Combination Square, Number of Pieces 2, Blade Finish Satin, Blade Material Steel, Head Length 3 in, Head Width 9/16 in, Blade Length 12 in, Blade Thickness 0.08 in, Blade Width 3/4 in, Graduation Mark Style Etched, Graduation Marks - Front 1/64 in, Head Type Square, System of Measurement SAE, Head Material Cast Iron, Head Vial Included Yes, Accuracy +/- .0025 in, Blade Coating Chrome, Features Reversible Lock Bolt, Graduation Color Black, Graduation Scale 4R, Graduation Units Inches This 2-pc. combination square set is designed for layout, setup, checking heights and depths, and setting angles. It features a blade (scale) and square head.
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