Spi 19-852-3 Class Zz Minus Plug Pin Gage 0.852 in

Product Description

The SPI 19-852-3 is a Class ZZ minus plug pin gage designed to verify bore and hole diameters to a nominal size of 0.852 inches. Built from steel, this go/no-go style gage member holds a minus tolerance of 0.0002 inches, keeping it within Class ZZ precision standards for dimensional inspection work. Machinists, quality control technicians, and tool-and-die professionals use plug gages like this one to confirm that drilled, reamed, or bored features meet print tolerances before parts move to the next stage of production or assembly.

This gage is suited for use in machine shops, manufacturing facilities, and inspection departments where repeatable, low-cost attribute gaging is required. The 0.852-inch nominal diameter targets mid-range bore sizes common in general machining and light manufacturing. At 0.2 pounds, the gage is lightweight and easy to handle during bench or floor inspection. It is sold individually and is intended for use as a single member within a gage handle or pin gage set.

Key Features

• Nominal diameter of 0.852 inches for precise bore and hole verification
• Class ZZ minus tolerance of 0.0002 inches for attribute-style go/no-go inspection
• Steel construction for durability in production and inspection environments
• Lightweight at 0.2 pounds for comfortable single-hand use
• Single-piece packaging suitable for replacing a worn gage member or expanding an existing set

Compatibility

Designed as an OEM-style replacement or standalone member compatible with standard plug gage handles sized for 0.852-inch diameter pin gages. Verify handle collet range before ordering.

Installation Notes

Plug pin gages are installed and used by machinists and quality technicians and require no special tooling beyond a compatible gage handle. Keep the gage clean and lightly oiled when not in use to prevent corrosion and dimensional drift. Never force a plug gage into a bore; damage to the gage or the workpiece can result. Store gages in a protective case away from temperature extremes to maintain calibration integrity.