Spi Z9303 Micrometer Spline Anvil 1 to 12 Inch

Product Description

The SPI Z9303 is a spline-type replacement anvil designed for use with outside micrometers in the 1 to 12 inch range. The anvil measures 0.05 inches in overall length and weighs approximately 0.2 pounds. It is a precision contact component that sits at the stationary measuring face of the micrometer, providing a stable reference surface for accurate dimensional measurement. Machinists, tool-and-die makers, metrology technicians, and quality-control inspectors install this part when replacing a worn or damaged anvil to restore the instrument to factory measuring performance.

This anvil is suited for use in machine shops, manufacturing facilities, and inspection rooms where outside micrometers in the 1 to 12 inch range are in service. The spline configuration allows proper seating in the micrometer frame anvil bore. It is typically used in applications requiring repeatable, high-precision linear measurement of machined parts, shafts, stock, and similar workpieces.

Key Features

• Spline anvil type for secure, repeatable seating in the micrometer frame
• Compatible with 1 to 12 inch outside micrometers
• Compact 0.05 inch overall length fits standard anvil bores
• Lightweight at 0.2 pounds for easy handling during replacement
• Single-piece replacement part — sold individually

Compatibility

Designed for use with 1 to 12 inch outside micrometers as a spline-type anvil replacement accessory.

Installation Notes

Installation of a micrometer anvil is typically performed by a metrology technician or machinist familiar with precision measuring instruments. Before replacing the anvil, ensure the micrometer is clean and free of chips or debris at the anvil seat. Use the appropriate spanner wrench or seating tool specified for the micrometer frame to avoid damaging the bore or the new anvil contact face. After installation, verify calibration against a known gauge block before returning the instrument to service.