Spi 19-037-1 Class Zz Minus Plug Pin Gage 0.037 in

Product Description

The SPI 19-037-1 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection work. With a nominal diameter of 0.037 inches and a minus tolerance of 0.000200 inches, this gage provides a reliable go/no-go reference for quality control checks on small-diameter features. Constructed from steel, the 19-037-1 is built to handle repeated use in shop floor and inspection room environments. It is typically used by machinists, toolmakers, and quality technicians who need consistent dimensional verification on tight-tolerance work.

This plug pin gage is suited for checking small bores in precision-machined components across manufacturing, aerospace, automotive, and general metalworking applications. The Class ZZ designation indicates it meets standard tolerance requirements for inspection-grade gaging. The minus designation means the gage is ground to the lower boundary of the tolerance band, making it appropriate for specific go or no-go inspection roles depending on the application setup.

Key Features

• Nominal diameter of 0.037 inches for small-bore inspection
• Class ZZ minus tolerance grade at 0.000200 inches for inspection-grade accuracy
• Steel construction for durability and dimensional stability under repeated use
• Compact single-pin format for easy handling and storage
• Package quantity of 1 for individual replacement or addition to existing gage sets

Compatibility

Designed as a standard Class ZZ minus plug pin gage suitable for use in general inspection and quality control applications requiring verification of 0.037-inch diameter bores and holes.

Installation Notes

Plug pin gages are used by quality technicians and machinists and require no installation in the traditional sense, but proper handling is essential for accurate results. Keep the gage clean and lightly oiled when not in use to prevent corrosion and wear. Never force a plug gage into a bore; light hand pressure is the correct method to avoid damage to the gage or the workpiece. Store individually or in a dedicated gage block case to protect the ground surface from nicks and contamination.