Spi 29-927-1 Class Zz Plus Plug Gage 0.927 in

Product Description

The SPI 29-927-1 is a Class ZZ Plus plug gage designed for precision hole inspection in industrial and manufacturing environments. It measures bore diameters at exactly 0.927 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection workflows where tight dimensional control is required. Constructed from steel, the gage delivers consistent performance under repeated use. Machinists, quality control technicians, and toolroom professionals use this type of gage to verify that drilled, reamed, or bored holes meet specified dimensional tolerances before parts advance to the next stage of production.

Class ZZ Plus plug gages are standard toolroom and production inspection instruments. They are used on shop floors, in inspection departments, and in toolrooms across metalworking, fabrication, and precision machining operations. The 0.927-inch diameter targets a commonly held bore size range found in general mechanical assemblies and component manufacturing. This gage is appropriate for both incoming inspection and in-process quality verification where a reliable, repeatable check of hole diameter is needed.

Key Features

• Nominal measurement diameter of 0.927 inches for direct bore inspection
• Class ZZ Plus tolerance rating at 0.0002 inches for high-accuracy dimensional verification
• Steel construction for durability and resistance to wear under repeated use
• Compact and lightweight at 0.2 pounds for easy single-hand operation
• Single-piece package quantity ready for immediate deployment

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for inspection setups requiring a 0.927-inch nominal bore diameter check in Class ZZ Plus tolerance applications.

Installation Notes

Plug gages are handled and used by quality control technicians and machinists. Ensure the workpiece bore and gage surfaces are clean and free of burrs, chips, or coolant before gauging to avoid false readings or gage damage. Do not force the gage into an undersize bore. Store the gage in its protective case when not in use to preserve surface finish and dimensional integrity.