Spi 19-769-9 Class Zz Minus Plug Pin Gage 0.769 in

Product Description

The SPI 19-769-9 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.769 inches with a tolerance of 0.000200 inches. Plug pin gages are precision hand tools used to verify whether a drilled, reamed, or bored hole falls within its specified dimensional tolerance. The minus designation means the gage is manufactured to the lower boundary of the tolerance band, following standard go/no-go gaging convention. Constructed from steel, this gage delivers the rigidity and wear resistance required for consistent, repeatable measurement results on the shop floor or in a quality control environment.

This gage is suited for machinists, tool-and-die makers, quality technicians, and metrology professionals working in manufacturing, fabrication, or inspection settings. It is used to check hole diameter conformance in production parts, fixtures, and assemblies where a 0.769-inch nominal bore specification must be verified. The compact, single-pin format makes it easy to integrate into incoming inspection, in-process gauging, or final inspection workflows.

Key Features

• Nominal diameter of 0.769 inches for precise hole conformance checking
• Class ZZ tolerance rating suitable for inspection and shop-floor gaging applications
• Minus plug configuration manufactured to the lower tolerance boundary per standard gaging practice
• Steel construction provides durability and resistance to wear during repeated use
• Tolerance of 0.000200 inches ensures dimensional accuracy of the gage itself

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in any application requiring verification of a 0.769-inch nominal hole diameter in accordance with accepted go/no-go gaging standards.

Installation Notes

Plug pin gages should be handled and stored carefully to prevent surface damage that could affect accuracy. Clean both the gage and the hole being checked before use to remove chips, coolant, or debris. Apply light, consistent hand pressure when inserting the gage — never force it into a bore. Calibrate and re-verify gage dimensions periodically according to your quality management system requirements.