Starrett 67485 Class Zz Plug Gage Set 250 Piece

Product Description

The STARRETT 67485 is a Class ZZ plug gage set covering a diameter range of 0.251 to 0.500 inches in 250 individual gages. Each gage is manufactured from steel and held to a minus tolerance of 0.0002 inches, conforming to Class ZZ standards for go/no-go dimensional verification. The set ships with a fully adjustable NO-GO gage handle included with each gage, and all pieces are color coded for fast identification in the shop. This type of set is used by machinists, toolmakers, and quality control technicians performing precision hole inspection on production or fabricated parts.

This plug gage set is suited for residential shop, manufacturing, and industrial quality assurance environments where accurate bore and hole verification is required. The small hole size range makes it particularly useful for gaging slots, locating hole distances, and inspecting close-tolerance bored or reamed holes. The 250-piece coverage across the 0.251 to 0.500 inch range provides broad capability from a single organized set, reducing the need for individual gage procurement across that span.

Key Features

• Class ZZ tolerance rating with a minus tolerance of 0.0002 inches per gage
• Covers 0.251 to 0.500 inch diameter range in 250 pieces
• Color-coded gages for rapid size identification
• Fully adjustable NO-GO gage handle furnished with each set
• Small hole sizes suitable for gaging slots and determining hole distances
• Steel construction for durability in production inspection environments

Compatibility

Designed as a direct-use Class ZZ plug gage set for any application requiring hole and bore inspection in the 0.251 to 0.500 inch diameter range. No specific equipment mounting or system integration is required.

Installation Notes

Plug gages should be handled by metrology technicians or machinists trained in dimensional inspection procedures. Clean and deburr the hole or bore before gaging to avoid false readings or gage damage. Store gages in their case when not in use to prevent corrosion and surface damage. Follow your facility calibration schedule and applicable ASME B89 standards for gage maintenance and recertification.