Spi 29-367-0 Class Zz Plus Plug Gage 0.367 in

Product Description

The SPI 29-367-0 is a Class ZZ Plus plug gage machined to a 0.3670-inch diameter with a tolerance of 0.0002 inches. Plug gages in this class are used for GO/NO-GO hole inspection, confirming that a drilled, reamed, or bored hole falls within the required dimensional range. The steel construction provides durability under repeated use in production and inspection environments. Class ZZ Plus designates a tighter tolerance grade than standard Class ZZ, making this gage suitable for applications where dimensional accuracy is critical and hole size verification must be repeatable and reliable.

This plug gage is used in machine shops, manufacturing facilities, and quality-control inspection stations. It is well suited for verifying hole diameters on precision-machined components where tolerances are closely controlled. Machinists, quality technicians, and tool-and-die professionals use this style of gage as part of incoming inspection, in-process checks, and final verification workflows. At 0.3670 inches, the gage covers a common drill and reamer size range encountered across general metalworking and fabrication operations.

Key Features

• 0.3670-inch nominal diameter for precise hole inspection at a common drill size
• 0.0002-inch tolerance meets Class ZZ Plus accuracy requirements
• Steel construction for wear resistance and dimensional stability under repeated use
• Single-piece plug gage format — straightforward GO/NO-GO inspection without additional setup
• Lightweight at 0.2 pounds, suitable for bench and handheld inspection use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage compatible with standard GO/NO-GO gage handles and fixtures that accept plain cylindrical plug gage blanks in the applicable diameter range.

Installation Notes

Plug gages are used by machinists and quality inspection personnel and do not require installation in the traditional sense. Store the gage in its protective case when not in use to prevent surface damage and contamination. Handle with clean, dry hands or cotton inspection gloves to avoid corrosion from skin oils. Verify the gage against a calibrated master ring gage periodically to confirm it remains within tolerance, particularly in high-cycle inspection environments.