Spi 19-914-1 Class Zz Minus Plug Pin Gage 0.914 in

Product Description

The SPI 19-914-1 is a Class ZZ minus plug pin gage machined from steel, designed to verify that a hole or bore meets its minimum acceptable size. The gage measures 0.914 inches in diameter and carries a tolerance of 0.0002 inches, placing it in the Class ZZ category suited for general inspection and Go/No-Go gauging applications in production and quality control environments. Machinists, toolroom technicians, and quality inspectors use pin gages like the 19-914-1 to confirm dimensional conformance quickly and reliably without complex measurement setups.

This pin gage is appropriate for use in machine shops, manufacturing plants, and metrology labs where hole diameter verification is a routine part of the inspection process. It is suited for checking drilled, reamed, or bored holes in metal, plastic, and composite workpieces. The minus designation means the gage is manufactured to the lower half of the tolerance band, making it the Go member in a Go/No-Go gage pair for the 0.914-inch nominal diameter.

Key Features

• 0.914-inch nominal diameter for precise hole inspection at that size
• Class ZZ tolerance of 0.0002 inches for general-purpose gauging applications
• Minus designation — manufactured to the lower tolerance band, functions as a Go gage
• Steel construction for durability and dimensional stability during repeated use
• Lightweight at 0.2 pounds, easy to handle during bench or in-line inspection

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ minus plug gage for any application requiring Go/No-Go inspection of a 0.914-inch nominal diameter hole.

Installation Notes

Pin gages are handled by quality control technicians and toolroom personnel following standard metrology practices. Clean the gage and the bore being checked before use to prevent contamination from affecting the measurement. Never force a plug gage into a hole; if resistance is encountered, the hole is undersize. Store the gage in a protected case away from other metal tooling to prevent nicks and surface damage that would compromise accuracy.