Spi 19-140-3 Class Zz Minus Plug Pin Gage 0.14 in

Product Description

The SPI 19-140-3 is a Class ZZ minus plug pin gage used to verify hole diameters and bore dimensions in precision machining and inspection applications. Designed to the minus tolerance convention, this gage measures 0.14 inches in diameter and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection workflows where tight dimensional control is required. Constructed from steel for durability and wear resistance, it is a standard tool in quality control departments, machine shops, and manufacturing environments where accurate bore verification is essential.

This pin gage is used in dimensional inspection of machined parts, castings, and fabricated components. It is appropriate for both production-floor spot checks and metrology lab verification tasks. Machinists, quality technicians, and tool-and-die professionals use Class ZZ gages as an economical option for inspection of tolerances where gage-grade accuracy at the ZZ level is specified. The minus designation indicates the gage is manufactured to the lower end of the nominal diameter, which is standard practice for plug gages used in go-gage applications.

Key Features

• Class ZZ tolerance rating suitable for general-purpose hole inspection
• Minus tolerance convention for go-gage dimensional verification
• 0.0002 inch tolerance for reliable close-tolerance inspection
• Steel construction provides durability and resistance to wear under repeated use
• Compact 0.14 inch diameter covers small bore inspection requirements

Compatibility

Designed as a standard Class ZZ minus plug pin gage suitable for use with pin gage handle sets and gage blocks in general-purpose dimensional inspection setups.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton inspection gloves to prevent corrosion from skin oils. Store in a protective case away from abrasive surfaces when not in use. Clean mating bores before gauging to prevent debris from affecting measurement accuracy. Calibration intervals should follow the requirements of the applicable quality management system.