Spi 23-135-7 Threaded Ring Gage 6-32 Class 2A Go No Go

Product Description

The SPI 23-135-7 is a double-ring threaded ring gage used to verify the dimensional accuracy of external 6-32 threads to Class 2A tolerance standards. The set includes both a Go ring and a No Go ring in a single double-ring body, allowing technicians to confirm that a threaded fastener or component falls within the acceptable tolerance range without switching tools. Constructed from tool steel, the gage delivers the hardness and wear resistance required for repeated inspection use in production or maintenance environments. NIST traceability certification is included, supporting quality-system documentation requirements.

This gage is suited for inspection tasks in manufacturing, machining, and mechanical assembly operations where 6-32 threaded components must be verified against ASME or equivalent thread tolerance specifications. It is commonly used by machinists, quality control inspectors, and tool-room technicians working with small-diameter machine screws, standoffs, and threaded inserts. The compact double-ring format reduces changeover time during high-volume inspection runs.

Key Features

• Go and No Go rings combined in a single double-ring body for efficient thread verification
• Calibrated to Class 2A tolerance for 6-32 unified coarse thread
• Tool steel construction for hardness and long service life under repeated use
• NIST traceability certification included to support ISO or internal quality records
• Compact form factor suited for bench inspection and in-line production checks

Compatibility

Designed for inspection of external 6-32 unified coarse thread forms produced to Class 2A tolerance requirements.

Installation Notes

Thread ring gages are handled and applied by quality control inspectors or machinists — no installation in the traditional sense is required. Store the gage in its protective case when not in use to prevent nicks or corrosion that could affect calibration. Apply a light coat of calibration-grade oil before and after use to preserve the tool steel surfaces. Recheck calibration against reference masters at intervals consistent with your facility quality plan or applicable standards.