สามทางเกลียวใน

D20 x 3/4 x 20, D25 x 1/2 x 25, D25 x 3/4 x 25, D32 x 1 x 32, D32 x 1/2 x 32, D32 x 3/4 x 32, D40 x 1 x 40, D20 x 1/2 x 20, 1/2 x D32 x D32