JIS B0203 JIS Tapered Pipe (PT)

Jun 01, 2019

The JIS tapered thread is similar to the BSPT connection in design, appearance and  dimensions. The JIS tapered thread and the BSPT connection are interchangeable.

Inch Size, Size mm (Dash), Nominal Thread Tapered Size, Male Thread O.D. Female Thread I.D.

1 ⁄ 4 6 (04) 1 ⁄ 4 -19 33 ⁄ 64 13,2 15 ⁄ 32 11,9

3 ⁄ 8 9 (06) 3 ⁄ 8 -19 21 ⁄ 32 16,7 19 ⁄ 32 15,3

1 ⁄ 2 12 (08) 1 ⁄ 2 -14 13 ⁄ 16 21,0   3 ⁄ 4 19,2

3 ⁄ 4 19 (12) 3 ⁄ 4 -14 1 1 ⁄ 32 26,4 31 ⁄ 32 24,6

1 25 (16) 1-11 1 5 ⁄ 16 33,3 1 7 ⁄ 32 30,9

1 1 ⁄ 4 32 (20) 1 1 ⁄ 4 -11 1 21 ⁄ 32 41,9 1 9 ⁄ 16 39,6

1 1 ⁄ 2 38 (24) 1 1 ⁄ 2 -11 1 7 ⁄ 8 47,8 1 25 ⁄ 32 45,5

2 50 (32) 2-11 2 11 ⁄ 32 59,7 2 1 ⁄ 4 57,4