Spi 19-236-9 Class Zz Minus Plug Pin Gage 0.236 in

Product Description

The SPI 19-236-9 is a Class ZZ minus plug pin gage with a 0.236-inch nominal diameter, manufactured from steel for consistent hardness and wear resistance. Plug pin gages in the minus tolerance class are ground slightly under nominal size, allowing them to serve as go/no-go reference tools for checking hole diameters and bore acceptance in production and inspection environments. The 19-236-9 holds a tolerance of 0.0002 inches, making it suitable for general-purpose dimensional verification where tight process control is required. Machinists, quality control technicians, and toolroom professionals use this type of gage as part of standard incoming and in-process inspection routines.

This gage is used in machine shops, toolrooms, and manufacturing facilities for verifying drilled, reamed, or bored hole diameters. It is appropriate for use on metal, plastic, and composite workpieces where a 0.236-inch hole specification must be confirmed. The minus designation means the gage is ground to the lower boundary of the nominal size, consistent with standard go-gage practice for checking minimum acceptable hole size. It is a single-piece gage intended for bench or handheld inspection use.

Key Features

• Class ZZ tolerance class for general-purpose inspection and toolroom use
• Minus tolerance ground: gage diameter is at or just below nominal for go-gage application
• 0.0002-inch tolerance for reliable dimensional verification
• Steel construction for hardness and long service life under repeated use
• 0.236-inch nominal diameter covers a common drilled and reamed hole size
• Single-piece unit, no assembly required

Compatibility

Designed as a direct-use plug pin gage for any inspection setup requiring a 0.236-inch nominal diameter Class ZZ minus reference standard. Compatible with standard gage handle holders sized for the 0.236-inch shank diameter.

Installation Notes

Plug pin gages require no installation in the traditional sense, but proper handling is essential to maintaining accuracy. Always clean the gage and the bore being checked before use to prevent contamination from affecting readings. Store the gage in a protective case away from other metal tooling to prevent nicks or surface damage. Calibrated gages should be handled with clean, dry hands or cotton gloves to minimize corrosion from skin oils.