Table 1: DIFF-bolt Specifications.

 2.54 cm DIFF-bolt 1.91 cm DIFF-bolt
2.54 cm outside diameter  1.91 cm outside diam.
 
height 1.36 cm,
weight - 53.44 g
well diameter 2.6 cm
height 1.36 cm,
weight - 30.07 g
well diameter 1.8 cm
top groove 0.23 cm wide 0.006 cm deep
bottom of bolt not polished
top groove 0.23 cm wide, 0.006 cm deep bottom of bolt not polished