Spi 19-115-5 Class Zz Minus Plug Pin Gage 0.115 in

Product Description

The SPI 19-115-5 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.115 inches with a tolerance of 0.0002 inches. It is used to verify hole size by checking whether a bore meets minimum acceptable dimensions. The minus designation means the gage is manufactured to the lower end of the tolerance range, making it suitable for go/no-go inspection routines in precision machining and quality control environments. Constructed from steel, this gage delivers the dimensional stability required for repeatable measurement results. Machinists, quality inspectors, and tool-and-die professionals rely on pin gages like this one for fast, reliable bore verification on the shop floor or at an inspection station.

This pin gage is suited for inspecting small-diameter holes in machined components, castings, stampings, and fabricated parts. It is commonly used in manufacturing facilities, machine shops, and quality assurance departments where tight hole tolerances must be confirmed before assembly. The 0.115-inch diameter and Class ZZ classification make it appropriate for general-purpose inspection work where high-precision Class Z or ZZ tolerances are specified on engineering drawings.

Key Features

• Nominal diameter of 0.115 inches for precise small-bore inspection
• Class ZZ minus tolerance of 0.0002 inches for general-purpose go/no-go gauging
• Steel construction provides durability and dimensional stability during repeated use
• Minus designation targets the lower end of the tolerance band for accurate fit checking
• Compact, single-pin format for quick manual inspection without additional fixturing

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use with standard pin gage handle sets and compatible with inspection routines requiring 0.115-inch nominal bore verification.

Installation Notes

Pin gages should be inserted by hand with light, controlled pressure — never forced — to avoid scoring the bore or damaging the gage surface. Clean and lightly oil the gage before and after use to prevent corrosion and maintain dimensional accuracy. Store pin gages in a protective case away from impact hazards. Inspection should be performed by qualified personnel following applicable ASME or ISO gauging standards.