Spi 19-046-2 Class Zz Minus Plug Pin Gage 0.046 in

Product Description

The SPI 19-046-2 is a Class ZZ minus plug pin gage ground to a 0.046 inch nominal diameter with a tolerance of 0.0002 inches in the minus direction. Pin gages in this class are single-ended go-style tools used to verify hole diameters, slot widths, and feature locations on machined parts. Class ZZ is the most widely used tolerance grade for general inspection work and is appropriate for checking workpiece tolerances in the range typical of standard production machining. The steel construction provides the hardness and dimensional stability required for repeatable measurement. Machinists, quality technicians, and toolroom personnel are the primary users of this gage type.

This gage is suited for incoming inspection, in-process quality checks, and final inspection of drilled, reamed, or punched holes in metal, plastic, and composite workpieces. At 0.046 inches, this is a small-diameter gage appropriate for fine features found in precision sheet metal, instrument housings, printed circuit board hardware, and small machined components. It is used as a standalone go gage to confirm that a hole has been produced at or above the minimum acceptable diameter within the minus tolerance limit.

Key Features

• Class ZZ tolerance grade for general-purpose inspection applications
• Minus designation confirms the gage is ground to the low side of the nominal diameter
• 0.046 inch nominal diameter for checking small precision features
• Steel construction provides hardness and dimensional stability for repeatable use
• 0.0002 inch tolerance meets standard go-gage accuracy requirements
• Single-piece gage suitable for manual pass-fail hole inspection

Compatibility

Designed as an OEM-style replacement or standard addition to Class ZZ pin gage sets used in general machining and quality inspection environments. This gage is compatible with standard pin gage handles and gage blocks used to hold individual pin gages during inspection.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton inspection gloves to prevent corrosion from skin oils and to avoid introducing dimensional error from thermal expansion. Before use, clean the gage and the workpiece feature with a lint-free cloth to remove chips, coolant, and debris. Apply only light hand pressure when inserting the gage into a hole; never force a pin gage, as this can damage the gage or the workpiece feature being checked. Store pin gages in a protective case away from other metal tools to prevent nicking the ground surface.