Spi 19-124-7 Class Zz Minus Plug Pin Gage 0.124 in

Product Description

The SPI 19-124-7 is a Class ZZ minus plug pin gage with a 0.124-inch nominal diameter, designed for go/no-go gauging of holes, bores, and precision openings in machined components. Class ZZ is the standard tolerance class for general-purpose inspection, and the minus designation means the gage is manufactured to the lower end of the tolerance range, providing a conservative check for minimum hole size. With a tolerance of 0.0002 inches, this gage delivers repeatable, accurate measurement results in tool rooms, production floors, and quality inspection stations. It is constructed from steel for durability and dimensional stability under normal shop conditions.

This plug pin gage is used in metalworking, machining, and precision manufacturing environments where hole diameter verification is required. It suits inspection tasks on drilled, reamed, or bored holes in metal parts and assemblies. Typical users include machinists, quality control technicians, and toolroom personnel who need a reliable, low-cost method to confirm that a hole meets minimum dimensional requirements before parts move to the next stage of production or assembly.

Key Features

• Class ZZ tolerance class — suitable for general-purpose production and inspection gauging
• Minus designation provides conservative minimum-hole verification
• 0.0002-inch tolerance for precise dimensional confirmation
• Steel construction offers durability and resistance to wear in shop environments
• Compact single-pin format for straightforward go/no-go hole checking

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage suitable for go/no-go inspection of holes with a 0.124-inch nominal diameter in standard machining and quality control applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality inspection personnel — no special trade license is required, but proper gauging technique is essential for accurate results. Clean the gage and the hole to be measured before use to prevent debris from affecting readings. Never force a plug gage into a hole; apply light, consistent hand pressure only. Store the gage in a protective case away from moisture and temperature extremes to preserve its calibrated dimensions.