Spi 19-535-4 Class Zz Minus Plug Pin Gage 0.535 in

Product Description

The SPI 19-535-4 is a Class ZZ minus plug pin gage used to inspect and verify bore diameters, hole sizes, and internal tolerances in machined components. Manufactured from steel, this go-style gage checks a nominal diameter of 0.535 inches with a tolerance of 0.0002 inches, making it suitable for general-purpose dimensional inspection in shop and manufacturing environments. Class ZZ gages are designed for checking work tolerances where production-grade accuracy is required. This gage is typically handled by machinists, quality control technicians, and tool-room personnel performing routine inspection tasks.

The 19-535-4 is used in production shops, tool rooms, and inspection departments to verify that drilled, reamed, or bored holes meet specified dimensional requirements. It applies wherever a 0.535-inch nominal bore must be confirmed within close tolerances before assembly or final inspection sign-off. Its compact form and steel construction make it a practical choice for both bench inspection and floor-level quality checks.

Key Features

• Nominal diameter of 0.535 inches for targeted bore inspection
• Class ZZ minus tolerance of 0.0002 inches for general-purpose shop use
• Steel construction for durability in production and tool-room environments
• Single-piece plug gage format for straightforward go-style checking
• Lightweight at 0.2 pounds for easy one-hand handling during inspection

Compatibility

Designed as an OEM-style dimensional inspection tool compatible with standard plug gage handles and fixtures sized for 0.535-inch class plug gages used in general machining and quality control applications.

Installation Notes

Plug pin gages are used by machinists and QC technicians and require no installation in the traditional sense, but proper handling is critical to accuracy. Store the gage in a protective case away from temperature extremes, as thermal expansion can affect measurement results. Clean the gage and the bore being checked before use to avoid false readings from debris or coolant residue. Never force the gage into a bore; if resistance is felt, the hole is undersize and should be returned for rework.