SPI 10-751-6 Mechanical Inside Hole Micrometer: 4" to 5" Range, 5.51" Gage Depth

SPI 10-751-6 Mechanical Inside Hole Micrometer: 4" to 5" Range, 5.51" Gage Depth. 0.0002" Graduation, 0.0004" Accuracy. Solid carbide measuring faces. Ratchet stop thimble provides uniform measuring pressure and assures highest reading accuracy. 3-point internal micrometer gives precise direct measurement of bore diameters. Suitable to measure to within 0.050" of bottom of blind holes. For over 60 years, SPI has introduced innovative products to the metalworking and laboratory industries. SPI measuring instruments are durable, precise, and reliable — all backed by an Industry leading 2-Year warranty.

• 3-Point internal micrometer provides precise direct measurement of bore diameters from 4" to 5" at up to 5.51" depth
• Self-aligning and self-centering, with carbide measuring anvils
• Ratchet stop provides uniform measuring pressure and assures the highest reading accuracy
• Feelers taper toward the back for positive reading on the front edge
• Suitable for measuring to within 0.050" of the bottom of blind holes