Spi 19-942-2 Class Zz Minus Plug Pin Gage 0.942 in

Product Description

The SPI 19-942-2 is a Class ZZ minus plug pin gage machined to a 0.942-inch nominal diameter for use in go/no-go inspection workflows. Class ZZ is the standard tolerance grade for general-purpose dimensional inspection, and this minus configuration means the gage is manufactured at the low end of the tolerance band, making it suitable for checking minimum acceptable hole size. At 0.0002-inch tolerance, the 19-942-2 delivers the precision required for production-floor and incoming inspection tasks. The steel construction provides the durability and wear resistance expected in repetitive gage applications. Machinists, quality technicians, and tool-and-die professionals use plug pin gages like this one to verify bore and hole dimensions against print specifications.

The SPI 19-942-2 is applied in dimensional inspection of drilled, reamed, or bored holes where a 0.942-inch nominal diameter must be confirmed. Typical settings include manufacturing QC departments, machine shops, and tool rooms performing in-process or final inspection. The minus designation makes this gage appropriate for verifying that a hole meets minimum size requirements before assembly or further machining. It is commonly used alongside a corresponding plus gage in a matched pair for full go/no-go inspection coverage.

Key Features

• Class ZZ tolerance grade suited for general-purpose production inspection
• Minus configuration checks minimum acceptable hole diameter
• 0.0002-inch tolerance for precise dimensional verification
• Steel construction for durability and resistance to wear in repetitive use
• 0.942-inch nominal diameter for direct use without conversion

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in go/no-go hole inspection applications requiring a 0.942-inch nominal diameter check.

Installation Notes

Plug pin gages are handled and stored by quality technicians and machinists following standard gage-care practices. Keep the gage clean and lightly oiled to prevent corrosion on the steel surface. Do not force the gage into a hole; insertion should be smooth to avoid damaging the gage or the workpiece bore. Store in a protective case away from temperature extremes to maintain calibration integrity.