Spi 19-034-8 Class Zz Minus Plug Pin Gage 0.034 in

Product Description

The SPI 19-034-8 is a Class ZZ minus plug pin gage machined from steel, used to verify hole diameter tolerance in precision measurement applications. The gage checks a nominal diameter of 0.034 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. Class ZZ designates a minus-tolerance gage, meaning the gage diameter is ground to the low side of the tolerance band. This part is handled by quality technicians, toolroom machinists, and inspection personnel working to dimensional standards in manufacturing and fabrication environments.

This pin gage is used in shop-floor and lab inspection of drilled, reamed, or punched holes requiring close-tolerance verification. It fits applications across general manufacturing, aerospace component inspection, precision machining, and similar trades where hole geometry must be confirmed before assembly. The compact size suits inspection of small-bore features common in instrument bodies, valve components, and mechanical assemblies. Sold individually as a single-gage unit.

Key Features

• Class ZZ minus tolerance designation for go/no-go hole inspection
• Nominal diameter of 0.034 inches for small-bore measurement
• Tolerance of 0.0002 inches for precise dimensional verification
• Steel construction for durability in production and inspection environments
• Single-gage packaging for individual replacement or kit supplementation

Compatibility

Designed as a standard Class ZZ minus plug pin gage suitable for use with conventional pin gage handles and general-purpose hole inspection setups in manufacturing and quality control applications.

Installation Notes

Pin gages are handled by quality control technicians and toolroom personnel following applicable dimensional inspection standards. Gages should be stored in a protective case and handled with clean cotton gloves to prevent corrosion and dimensional distortion from skin oils. Do not force a pin gage through a hole; resistance indicates the feature is undersized. Periodic recalibration against traceable standards is recommended to maintain measurement integrity.