Dasqua Thread gauge 622122 - Dasqua 6311-3205, The Dasqua 6311-3205 Thread Gauge Set includes seven precision Go ring gauges. Manufactured by Dasqua, this tool is designed for accurately measuring thread sizes. It is typically used in mechanical and engineering applications for ensuring proper thread fit. Dasqua 6311-3205 Thread Gauge Set 7 Pieces Precision Go Ring Measurement