Spi 31-471-6 Id Od Caliper Attachment 8 Piece Set

Product Description

The SPI 31-471-6 is an 8-piece inside and outside diameter attachment set designed for use with 6-inch dial or electronic calipers. The set adds thread-measuring capability to a standard caliper by providing four pairs of ID inserts that cover pitch ranges from 0.60 mm up to 4.00 mm. Each insert pair is chrome-finished for durability and corrosion resistance. This type of attachment is used by machinists, quality-control technicians, and precision measurement professionals who need to measure internal and external thread pitch dimensions without a dedicated thread-measuring instrument. Instructions are included with the set.

This attachment set is suited for precision measurement applications in machine shops, inspection departments, and manufacturing environments. It extends the utility of an existing 6-inch dial or electronic caliper by enabling thread-pitch measurement across four pitch ranges: 0.60 to 1.00 mm, 1.00 to 1.50 mm, 1.50 to 2.50 mm, and 2.50 to 4.00 mm. The kit is sold as a single package and is appropriate for both production-floor use and bench-level inspection tasks.

Key Features

• 8-piece set includes four pairs of ID inserts covering four thread pitch ranges
• Compatible with standard 6-inch dial or electronic calipers
• Pitch coverage spans 0.60 mm minimum to 4.00 mm maximum across all four insert pairs
• Chrome finish on inserts for wear and corrosion resistance
• Instructions included for setup and use

Compatibility

Designed for use with 6-inch dial or electronic calipers as stated by the manufacturer.

Installation Notes

Attachment and removal of the insert pairs should be performed with the caliper powered off or the dial face protected from impact. Verify that the caliper jaw faces are clean and free of debris before mounting the inserts to ensure accurate seating. Follow the included instructions for correct insert orientation relative to the caliper jaw geometry. No special tools are required for installation.