Spi 19-746-7 Class Zz Minus Plug Pin Gage 0.746 in

Product Description

The SPI 19-746-7 is a Class ZZ minus plug pin gage designed to verify bore and hole diameters to a 0.746-inch nominal size. Built from steel, it delivers the dimensional stability required for accurate go/no-go inspection work on the shop floor or in a quality control setting. The minus tolerance classification means the gage is manufactured slightly below nominal, a standard approach for checking minimum material condition. With a tolerance of 0.0002 inches, this gage meets Class ZZ specifications for general-purpose inspection tasks. Machinists, quality technicians, and tool-and-die professionals use plug pin gages as a fast, reliable method to confirm whether a hole is within acceptable limits without requiring a measuring instrument readout.

This gage is suited for use in manufacturing, machining, and fabrication environments where hole diameter verification is part of routine inspection. It is appropriate for checking drilled, reamed, or bored holes in metal, plastic, or composite workpieces. At 0.746 inches, it falls within the mid-range of standard pin gage sets and is commonly used in both low-volume job shops and higher-volume production inspection lines. A single gage is supplied per package, making it a practical replacement or addition to an existing pin gage assortment.

Key Features

• Class ZZ minus tolerance classification for general-purpose bore inspection
• 0.0002-inch tolerance for repeatable dimensional verification
• Steel construction for durability and dimensional stability
• 0.746-inch nominal diameter targets a common mid-range bore size
• Compact and lightweight at 0.2 pounds for easy handling during inspection

Compatibility

Designed as a general-purpose Class ZZ plug pin gage for use with standard pin gage handles and accessories compatible with 0.746-inch diameter gages.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no installation in the traditional sense. Clean the gage and the bore being checked before use to prevent debris from affecting measurement accuracy. Store the gage in a protective case away from temperature extremes to maintain dimensional integrity. Handle with care to avoid dropping or striking the gage, as impact damage can alter the ground diameter and render it out of tolerance.