Spi 37-211-0 Plug Thread Gage M33x2 6H Go No Go

Product Description

The SPI 37-211-0 is a double-end plug thread gage used to verify internal metric threads to the M33x2 specification at 6H tolerance class. One end carries the Go member to confirm minimum material condition and full thread engagement; the opposite end carries the No Go member to detect oversize or out-of-tolerance conditions. A handle is included, making the gage ready for immediate bench use. Traceability certification to ANSI standards referenced to NIST is provided with the gage. This tool is used by machinists, quality inspectors, and precision metrology technicians in manufacturing and production environments.

This gage is suited for incoming inspection, in-process verification, and final inspection of tapped holes and internally threaded components machined to M33x2 metric coarse thread specifications. The 6H classification reflects the standard tolerance class for general-purpose metric internal threads, making this gage applicable across a wide range of production machining, fabrication, and assembly operations where controlled thread fit is required.

Key Features

• Double-end design combines Go and No Go members in a single tool for efficient thread verification
• M33x2 thread specification with 6H tolerance class for general-purpose metric internal threads
• Handle included — no separate handle purchase required
• ANSI traceability certification referenced to NIST standards included
• Compact form factor: 6.5 inches length, 1.3 inches width, 1.3 inches height

Compatibility

Designed for inspection of internally threaded components machined to M33x2 metric thread form at 6H tolerance class. Verify that the target application matches the thread size, pitch, and tolerance class before use.

Installation Notes

Plug thread gages are used by qualified metrology or quality personnel — no installation trade license is required, but proper gage handling practice should be followed. Ensure threaded components are clean and free of chips or coolant before gaging to avoid false readings or gage wear. Apply light, consistent hand pressure when inserting the Go and No Go members; never force or torque the gage into a threaded hole. Store the gage in its case when not in use to protect the precision ground threads from damage.