Spi 19-773-1 Class Zz Minus Plug Pin Gage 0.773 in

Product Description

The SPI 19-773-1 is a Class ZZ minus plug pin gage designed to verify hole diameters and bore tolerances in precision machining and inspection applications. The gage measures 0.773 inches in diameter and is manufactured from steel for durability and dimensional stability. Class ZZ is the standard tolerance class for general-purpose GO/NO-GO inspection, and the minus designation means the gage is ground to the lower limit of the nominal size. With a tolerance of 0.0002 inches, this pin gage delivers reliable Go-side checking for quality control workflows on the shop floor or in the inspection room.

This pin gage is suited for machinists, toolmakers, and quality control technicians working in manufacturing, job shops, and metrology labs. It is used to verify that drilled, reamed, or bored holes meet specified dimensional tolerances. The 0.773 inch diameter makes it applicable to medium-bore inspection tasks in both production and incoming-inspection environments. It is a standalone gage pin intended for hand use without a handle, though it is compatible with standard gage pin handles sold separately.

Key Features

• Class ZZ tolerance class for general-purpose dimensional inspection
• Minus designation ground to the lower nominal limit for Go-side application
• 0.0002 inch tolerance for accurate bore verification
• Steel construction for wear resistance and long service life
• 0.773 inch diameter for medium-bore hole checking

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose Go-side hole inspection. Compatible with standard gage pin handles sized for 0.773 inch diameter pins.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no installation in the traditional sense. Handle the gage with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, clean the gage and the workpiece bore with a lint-free cloth to ensure accurate measurement. Store pin gages in a protective case away from heat sources to maintain dimensional accuracy over time.