Spi 19-035-5 Class Zz Minus Plug Pin Gage 0.035 in

Product Description

The SPI 19-035-5 is a Class ZZ minus plug pin gage designed for precise go/no-go inspection of small bored holes and drilled features. Built to Class ZZ tolerance standards, this gage holds a minus tolerance of 0.000200 inches, making it suitable for production-floor inspection where a conservative fit check is required. The 0.035-inch diameter steel pin is sized for fine-bore applications common in machining, tooling, and precision assembly work. Machinists, quality technicians, and tool-and-die professionals use plug pin gages like this one to verify hole diameter conformance without complex metrology equipment.

This gage is used in manufacturing and precision fabrication environments where tight hole tolerances must be verified quickly and reliably. The 0.035-inch size targets small-diameter features found in instrument housings, injector bodies, electronic enclosures, and fine mechanical assemblies. Its compact form allows use in confined bore locations that larger inspection tools cannot access. Typical install scenarios include incoming inspection, in-process quality checks, and final part acceptance in machine shops and production facilities.

Key Features

• Class ZZ minus tolerance rating at 0.000200 inches for conservative go/no-go inspection
• 0.035-inch diameter steel pin sized for fine-bore and small-hole verification
• Steel construction for durability and dimensional stability under repeated use
• Compact single-pin form factor fits confined bore locations
• Suitable for production-floor inspection without complex calibration equipment

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for go/no-go inspection of 0.035-inch nominal diameter bored holes in precision machining and quality control applications.

Installation Notes

Plug pin gages are handled and used by quality technicians and machinists and require no power source or mechanical installation. Store the gage in a protective case away from corrosive environments to maintain dimensional integrity. Clean the pin and bore before each use to prevent debris from affecting measurement accuracy. Handle with clean dry gloves or a lint-free cloth to prevent corrosion from skin contact.