Mitutoyo 368-992 Series 368 Mechanical Holtest (Type II) 3-Point Internal Micrometer Complete Set (20-25, 25-30, 30-40, 40-50 mm)

The Mitutoyo mechanical Holtest internal micrometer set includes complete gages (micrometer head units and measuring heads) for each size. Three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. Hardened steel spindles with a carbide ball and cones with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtests ratchet stop mechanism provides a constant measuring force on the hardened steel spindle to ensure accurate, even measurements.

Features:

• Metric models
• Contact points are constructed of hardened steel
• Optional extension rod allows for measuring deep holes
• Optional setting rings for zero point adjustment are available
• Design allows for measurements closer to the bottom of blind bore holes
• Scale on thimble and sleeve is laser etched for easier reading in all conditions
• Supplied in a fitted plastic case