Spi 23-169-6 Threaded Ring Gage 7/16-14 Class 2A Go No Go

Product Description

The SPI 23-169-6 is a double-ring threaded ring gage used to verify the external thread dimensions of fasteners and threaded components machined to a 7/16-14 UNC thread specification. The gage set includes both a Go ring and a No Go ring, allowing machinists and quality technicians to confirm that a threaded part falls within the acceptable tolerance range for a Class 2A fit. Manufactured from tool steel, this gage is built for repeated use in production and inspection environments. NIST traceability certification is included, supporting documentation requirements for calibrated inspection tooling.

This gage is used in machine shops, production floors, and quality control departments wherever 7/16-14 UNC externally threaded parts must be inspected against Class 2A thread tolerance standards. Typical applications include incoming inspection of purchased fasteners, in-process verification during CNC or manual machining operations, and final inspection before assembly. The double-ring configuration keeps both the Go and No Go gages together as a matched set for the same thread specification.

Key Features

• Go and No Go rings included in a single double-ring set for complete Class 2A tolerance verification
• Designed for 7/16-14 UNC external thread inspection
• Constructed from tool steel for durability and dimensional stability under repeated use
• NIST traceability certification included to support calibrated inspection documentation requirements
• Compact form factor suitable for bench, line, or incoming inspection use

Compatibility

Designed for inspection of externally threaded parts with a 7/16-14 UNC thread form manufactured to Class 2A tolerance specifications.

Installation Notes

Threaded ring gages are used by machinists, quality technicians, and inspection personnel — not installed in a system but handled as calibrated inspection instruments. Keep gages clean and lightly oiled when not in use to prevent corrosion and preserve dimensional accuracy. Do not force the No Go ring onto a part; resistance indicates the thread is at or outside the tolerance boundary as intended. Store in a protective case away from impact, extreme temperatures, and abrasive contaminants to maintain calibration integrity.