Spi 34-432-5 Plug Thread Gage 1-12 3B Double End

Product Description

The SPI 34-432-5 is a double-end plug thread gage used to verify internal thread quality to 1-12 UN thread specifications at a 3B tolerance class. One end carries the Go member and the other carries the No Go member, allowing a technician to confirm both minimum and maximum thread form acceptance in a single tool. The gage is machined from steel for durability and dimensional stability under shop conditions. A handle is included, sized at handle size 4. Traceability documentation traceable to NIST standards is included with the tool, supporting quality-system and inspection recordkeeping requirements.

This plug thread gage is suited for inspection of 1-12 threaded bores in manufactured components, assemblies, or machined parts where thread acceptance criteria must be verified before assembly or shipment. It is used by machinists, quality inspectors, and precision measurement technicians in manufacturing, MRO, and production inspection environments. The double-end design keeps both Go and No Go members on a single handle, reducing tool changeover time during inspection runs.

Key Features

• Double-end configuration with Go and No Go members on a single tool
• Designed for 1-12 UN internal thread inspection at 3B tolerance class
• Steel construction for dimensional stability and long service life
• NIST-traceable calibration certificate included for quality-system compliance
• Handle size 4 included — no additional handle purchase required

Compatibility

Designed for inspection of 1-12 unified national thread form internal threads held to ANSI 3B tolerance class specifications.

Installation Notes

Thread plug gages are used by quality inspectors and precision measurement personnel, not installed in systems. Store the gage in its case when not in use to protect the thread members from damage or contamination. Clean threads and gage members before each use. If the Go member does not pass or the No Go member passes, do not force the gage — inspect the workpiece for thread damage or nonconformance and follow your facility inspection procedures.