Spi 19-657-6 Class Zz Minus Plug Pin Gage 0.657 in

Product Description

The SPI 19-657-6 is a Class ZZ minus plug pin gage used to verify hole dimensions and check bore tolerances in precision machining and inspection work. Machined from steel, this go/no-go style gage checks a nominal diameter of 0.657 inches with a minus tolerance of 0.000200 inches, making it suitable for quality control applications where close dimensional accuracy is required. It is a standard tool in machine shops, toolrooms, and manufacturing inspection stations where consistent bore verification is part of the workflow.

This plug gage is appropriate for use in both production and inspection environments. Machinists, quality technicians, and toolroom professionals use Class ZZ gages for general-purpose tolerance checking on drilled, reamed, or bored holes. The 0.657-inch nominal size fits into mid-range bore inspection work and is well suited to applications where ANSI or equivalent dimensional standards govern part acceptance.

Key Features

• Class ZZ minus tolerance rating for general-purpose hole inspection
• Nominal diameter of 0.657 inches for mid-range bore verification
• Tolerance of 0.000200 inches for consistent dimensional checks
• Steel construction for durability in shop and inspection environments
• Single-piece package ready for immediate use upon receipt

Compatibility

Designed as a general-purpose Class ZZ minus plug gage for verifying 0.657-inch nominal bore diameters in standard machining and inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality inspection technicians. Store gages in a clean, dry environment and handle with care to avoid contact damage to the gaged surface. Clean both the gage and the bore before use to ensure accurate readings. Do not force the gage into an undersized hole, as this can damage the gage and compromise dimensional accuracy.