One-way Thread Gauge 2→1 For metric threads Thread plug gauge made of tungsten carbide (half-type) For metric threads Thread ring gauge made of tungsten carbide (half-type) For metric threads Thread plug gauge made of ceramics (half-type) For metric threads Thread ring gauge made of ceramics (half-type) Steel thread plug gauge for metric threads Steel thread ring gauge for metric threads Steel thread plug gauge for unified threads Steel thread ring gauge for unified threads Steel thread plug gauge for straight pipe threads Steel thread ring gauge for straight pipe threads Steel thread plug gauge for taper pipe threads Steel thread ring gauge for taper pipe threads Thread Position Alignment Gauge Pos-T