Spi 19-020-7 Class Zz Minus Plug Pin Gage 0.02 in

Product Description

The SPI 19-020-7 is a Class ZZ minus plug pin gage used to check the dimensional accuracy of bored holes, drilled passages, and precision-machined openings. It measures 0.02 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. Machined from steel, this gage provides the rigidity and wear resistance needed for repeated use in production or maintenance environments. Machinists, tool-and-die workers, and quality control technicians are the primary users.

Class ZZ plug gages are designed for general-purpose inspection use rather than master or reference applications. The minus designation means the gage is manufactured to the lower end of the tolerance band, which is standard practice for go-side plug gages used in checking minimum acceptable hole sizes. This gage is appropriate for use in machine shops, maintenance facilities, and light manufacturing settings where small-bore hole verification is part of the inspection process.

Key Features

• 0.02-inch nominal diameter for small-bore hole inspection
• Class ZZ tolerance class suitable for general-purpose go/no-go gauging
• Minus tolerance designation for go-side dimensional checking
• 0.0002-inch tolerance for consistent, repeatable measurement results
• Steel construction for durability and resistance to wear during repeated use

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for inspecting holes with a nominal diameter of 0.02 inches in standard machining and quality control applications.

Installation Notes

Plug pin gages are used by machinists and quality technicians during inspection, not installation. Handle the gage with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case or rack away from other tooling to avoid surface damage. Calibrate or verify against a certified master gage at regular intervals to maintain measurement traceability per applicable quality standards.