Spi 22-189-5 Class Zz Plug Gage Set 185 Piece

Product Description

The SPI 22-189-5 is a 185-piece Class ZZ plug gage set covering a diameter range of 1.3 mm to 4.98 mm with a plus 0.005 mm tolerance. It is designed for dimensional inspection work in manufacturing, machining, and quality control environments. Each pin gage in the set is used to verify hole sizes, measure slot widths, calculate distances between holes, and perform GO gaging inspection. The set ships with a certificate of accuracy that is NIST traceable and includes a pin gage holder for organized storage and quick access during inspection routines. Machinists, quality technicians, and tool room professionals are the primary users.

This plug gage set is suited for incoming inspection, in-process quality checks, and final inspection on machined components where tight hole tolerances must be verified. The 1.3 mm to 4.98 mm range covers a wide span of small-diameter features commonly found in precision parts across automotive, aerospace, medical device, and general manufacturing applications. The NIST traceable calibration documentation supports use in ISO and AS9100 quality management environments where traceability records are required.

Key Features

• 185-piece set covers 1.3 mm to 4.98 mm diameter range in fine increments
• Class ZZ tolerance grade with plus 0.005 mm tolerance for accurate GO gage inspection
• NIST traceable certificate of accuracy included with each set
• Pin gage holder included for organized storage and field use
• Suitable for measuring hole sizes, slot widths, and inter-hole distances
• Supports GO gaging inspection workflows in production and quality lab settings

Compatibility

Designed for use with standard pin gage holders and gage block accessories compatible with the 1.3 mm to 4.98 mm diameter range. No specific system or equipment compatibility is stated by the manufacturer for this set.

Installation Notes

Plug gages are handled and used by quality technicians and machinists — no permanent installation is required. Store pins in the included holder to prevent damage to the gage surfaces. Clean pins and the workpiece bore before measurement to avoid false readings. Do not force a pin gage into a feature; controlled hand pressure is the correct technique to protect both the gage and the part being inspected.