SPI 3-Point Hole-Mike Inside Micrometer Set
1.600 – 4.000″ – 10-740-9

1.6 to 4″, Carbide, Hole Mechanical Inside Micrometer Set

0.0002″ Graduation, 6″ Extension Rod Length, (3) Setting Rings Included

SET 1.600 – 4.000″ incl. Extension, Setting Rings and Spanner wrenches in wooden case

Features:

• Three point internal micrometer for precise direct measurement of bore diameters
• Self aligning and self centering
• Carbide measuring anvils
• Suitable to measure to within .050″ of bottom of blind hole, up to 4″ capacity
• Feelers taper toward the back for positive reading of the front edge
• Ratchet stop provides uniform measuring pressure and assures highest reading accuracy

Specifications:

Item Number 10-740-9 Minimum Measurement (Decimal Inch) 1.6000 Maximum Measurement (Decimal Inch) 4.0000 Graduation (Decimal Inch) 0.0002 Accuracy (Decimal Inch) 0.000250 Number of Extension Rods 1 Thimble Type Ratchet Stop Gage Depth (Decimal Inch) 3.5400 Measurement Range (Decimal Inch) 1.600 to 4.000 Maximum Extension Rod Length (Inch) 6 Number of Heads 6 Number of Contact Points 0 Number of Setting Rings Included 3 Setting Ring Diameter (Decimal Inch) 2.0000; 2.8000; 3.6000 Digital Counter No

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