Spi 19-368-0 Class Zz Minus Plug Pin Gage 0.368 in

Product Description

The SPI 19-368-0 is a Class ZZ minus plug pin gage ground to a 0.368 inch nominal diameter with a tolerance of 0.0002 inches in the minus direction. Plug pin gages are single-ended or double-ended precision tools used to verify that a drilled, reamed, or bored hole falls within an acceptable dimensional range. The Class ZZ designation indicates a working-grade gage suited for production floor inspection and general quality control applications. The 19-368-0 is machined from steel, providing the hardness and wear resistance needed for repeated insertion into workpiece bores without dimensional drift over time.

This gage is used in machine shops, manufacturing facilities, and maintenance environments where hole size verification is required as part of a quality or inspection process. Typical applications include checking clearance holes, verifying bore diameters after machining, and confirming that mating components will assemble within tolerance. It is handled by machinists, quality control technicians, and toolroom personnel. The minus designation means the gage is manufactured to the lower boundary of the nominal diameter, which is standard practice for go-gage and working-gage applications.

Key Features

• 0.368 inch nominal diameter for direct hole size verification
• Class ZZ working-grade tolerance suitable for production floor inspection
• 0.0002 inch minus tolerance ensures the gage falls at the lower boundary of nominal size
• Steel construction provides hardness and resistance to wear during repeated use
• Lightweight at 0.2 pounds, suited for hand-held use at the point of inspection

Compatibility

Designed as a working-grade Class ZZ plug gage for verifying 0.368 inch diameter bores in general production inspection and quality control applications.

Installation Notes

Plug pin gages do not require installation and are used as handheld inspection tools. Handle the gage with clean, dry hands or lint-free gloves to prevent corrosion from skin oils, and store in a protective case when not in use. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece. Periodic cleaning and light oiling are recommended to maintain accuracy and prevent surface corrosion.