Spi 29-237-5 Class Zz Plus Plug Gage 0.237 in

Product Description

The SPI 29-237-5 is a Class ZZ Plus plug gage designed for precision go/no-go dimensional inspection of bored holes, drilled passages, and machined openings at a nominal diameter of 0.237 inches. Built to Class ZZ Plus tolerance standards, this gage holds a tolerance of 0.0002 inches, making it suitable for production-floor inspection tasks where consistent, repeatable measurement is required. The steel construction provides the durability needed for repeated use in shop environments. Machinists, quality control technicians, and tool-and-die professionals rely on gages of this type to verify that drilled or reamed holes fall within acceptable dimensional limits before parts advance to the next stage of production.

This plug gage is used in machine shops, manufacturing facilities, and precision fabrication environments where hole diameter verification is part of a standard inspection routine. It is appropriate for incoming material inspection, in-process quality checks, and final inspection of machined components. The 0.237 inch nominal diameter targets a specific hole size common in fixture work, tooling, and component assembly applications. Individual use with a single package quantity makes this gage practical for bench-level inspection setups.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for precise go/no-go hole inspection
• 0.237 inch nominal diameter targets a specific machined-hole size
• Steel construction for durability under repeated production-floor use
• Compact form factor suited for bench inspection and portable quality checks
• Single-unit packaging allows individual replacement or addition to an inspection set

Compatibility

Designed as a standard Class ZZ Plus plug gage for use in go/no-go inspection of machined holes with a nominal diameter of 0.237 inches.

Installation Notes

Plug gages require no installation but should be handled and stored according to standard metrology practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the gage into an undersized hole, as this can damage the gage and compromise its calibration. Periodic recalibration against NIST-traceable standards is recommended to maintain measurement integrity over time.