1 7/8" - 12 UN 2A GO PD 1.8191" Thread Ring Gauge 1 7/8" - 12 UN 2A GO PD 1.8191" Thread Ring Gauge 1 7/8" - 12 UN 2A GO PD 1.8191" Thread Ring Gauge £45.00 Sorry This Item Is Now Sold 0 in your basket View Basket Checkout