Precise 55 Piece 4-42 .25-6mm TPI 60 Degree Screw Pitch Gage - 4901-0030 Correct pitch is determined by matching blade teeth with threaders. Each blade is clearly marked with proper thread size. Blades are protected in a sturdy steel case. Combination of 3
Precise 55 Piece 4-42 .25-6mm TPI 60 Degree Screw Pitch Gage – 4901-0030
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