Use as a reference tool in determining the pitch of a thread that is on a screw or in a tapped hole. 

It is most useful for checking tool angle while cutting threads in metal turning lathes.

The angles on the thread cutting tool is checked on the V slots in the gauge.

Metric 60° & Whitworth 55° BSP screw thread profiles pitch gauge with lock up device

Precision cut edges for accurate use

Compact and easy to store

Metric (mm) - 60°

   6.0, 5.5, 5.0, 4.5, 4.0, 3.5;

   3.0, 2.5, 2.0, 1.75, 1.5, 1.25,

   1.0, 0.9, 0.8, 0.75, 0.7, 0.6;

   0.5, 0.45, 0.4, 0.35, 0.3, 0.25

Whitworth - 55°

    62G, 60G 1/16, 48G 3/32, 40G, 36G, 32G 5/32, 30G,

    28G, 26G, 25G, 24G 3/16 7/32, 22G, 20G 1/4, 19G,

    18G 5/16, 16G 3/8, 14G 7/16, 13G, 12G, 11G 5/8, 10G 3/4,

    9G 7/8, 8G 1", 7G 1 1/8 1 1/4, 6G 1 3/8 1 1/2, 5G 1 5/8 1 3/4, 4 1/2 G 1 7/8 2, 4G 2 1/4 2 1/2