Spi 19-539-6 Class Zz Minus Plug Pin Gage 0.539 in

Product Description

The SPI 19-539-6 is a Class ZZ minus plug pin gage used to verify hole diameters and bore tolerances in precision machining and inspection work. It measures 0.539 inches in diameter and is manufactured from steel for durability under repeated use. The minus designation means the gage is held to the lower allowable tolerance limit, making it suitable for go/no-go inspection routines where tight dimensional control is required. Machinists, quality control technicians, and tool-and-die professionals rely on this type of gage for fast, accurate in-process and final inspection checks.

This pin gage is suited for use in machine shops, manufacturing facilities, and inspection departments where hole size conformance must be verified quickly and consistently. It applies to residential and commercial precision fabrication environments and is a standard tool in any gage crib or inspection kit requiring 0.539-inch diameter verification. The steel construction holds up well in production settings with frequent handling.

Key Features

• Class ZZ tolerance grade for general-purpose inspection use
• Minus designation holds gage to lower tolerance boundary for go/no-go applications
• 0.539-inch nominal diameter for direct bore and hole verification
• 0.0002-inch tolerance for reliable dimensional accuracy
• Steel construction resists wear during repeated use
• Lightweight at 0.2 pounds for easy single-handed handling

Compatibility

Designed as a standard Class ZZ minus plug gage for use with pin gage handles and sets compatible with 0.539-inch diameter gage pins. Confirm handle range compatibility before use.

Installation Notes

Plug pin gages are handled by inspection and machining personnel and do not require installation in the traditional sense. Store gages in a protective case when not in use to prevent damage to the gage surface. Clean and lightly oil the gage before and after use to prevent corrosion. Never force the gage into a bore; if it does not pass smoothly, the hole is undersized.