Spi 19-641-0 Class Zz Minus Plug Pin Gage 0.641 in

Product Description

The SPI 19-641-0 is a Class ZZ minus plug pin gage machined from steel, designed to verify hole diameters in production and inspection environments. With a nominal diameter of 0.641 inches and a tolerance of 0.0002 inches, this gage provides the dimensional accuracy required for go/no-go inspection tasks. Class ZZ is the standard tolerance class for general-purpose inspection of commercial and industrial workpieces. Machinists, quality control technicians, and toolroom professionals use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specification before parts move to the next stage of production.

This plug pin gage is suited for use in machine shops, fabrication facilities, and quality inspection stations where consistent hole-diameter verification is required. The 0.641-inch diameter targets applications where that specific bore size is a controlled dimension. It is appropriate for both incoming inspection of raw components and in-process checks on the shop floor. The compact, single-piece design makes it easy to handle during high-volume inspection runs.

Key Features

• Nominal diameter of 0.641 inches for precise hole verification at that controlled size
• Class ZZ tolerance classification for general-purpose commercial and industrial inspection
• Minus designation indicates the gage is sized at the lower end of the tolerance band
• Tolerance of 0.0002 inches ensures repeatable, accurate go/no-go measurement
• Steel construction provides durability and wear resistance in shop environments

Compatibility

Designed as a general-purpose Class ZZ plug pin gage for use in any inspection or toolroom application requiring verification of a 0.641-inch nominal hole diameter.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians, not installed into a system. Before use, clean the gage and the workpiece bore thoroughly to remove chips, coolant, and debris that could affect the measurement. Store the gage in a protective case away from other metal tools to prevent nicks or surface damage that would compromise accuracy. Periodic calibration against a traceable standard is recommended to maintain measurement integrity over time.