Spi 34-337-6 Plug Thread Gage 0-80 2B Double End Go No Go

Product Description

The SPI 34-337-6 is a double-end plug thread gage designed to inspect #0-80 UNC threads to a 2B tolerance class. One end carries the Go member and the other carries the No Go member, allowing a technician to verify both minimum and maximum thread acceptance in a single tool. The gage is made from steel and ships with a size 0 handle included. A NIST-traceable certification is included with each unit, supporting quality documentation requirements in precision manufacturing and inspection environments. This tool is used by machinists, quality control inspectors, and toolroom technicians working with fine-pitch fastener threads.

The 34-337-6 is suited for incoming inspection, in-process verification, and final inspection of tapped holes and threaded components using #0-80 thread form. The 2B classification covers the standard commercial tolerance range for inch-series internal threads, making this gage applicable across general-purpose machined parts, instrument assemblies, and small mechanical components where thread fit and function must be confirmed before assembly.

Key Features

• Double-end design combines Go and No Go members in one tool for efficient thread inspection
• Inspects #0-80 thread size to 2B tolerance class per NIST standards
• Steel construction for durability and dimensional stability
• Size 0 handle included — no separate handle purchase required
• NIST-traceable traceability certification included for quality system compliance

Compatibility

Designed for inspection of internal #0-80 UNC threads in machined components, instrument housings, and assemblies requiring 2B class thread verification.

Installation Notes

Thread gages are inspection tools and do not require installation, but proper handling practice applies. Store the gage in its case when not in use to protect the go and no go members from contact damage. Clean threads and the gage members before inspection to prevent debris from causing false rejects. Calibration intervals should follow the quality system requirements of your facility; the included NIST-traceable certification supports initial traceability documentation.