28. Thread Series

■Unifined Threads ■Conversion Table ■ ■

Column SiColumn zeNominal Dia.CoarseFineExtra Fine ThreadC s per inconstant pitch series h
12inch
1 / 4
5 / 16
3 / 8 7 / 16 1 /
2
9 / 16 5 / 8
311 / 16
/ 413 / 16
7 / 8
15 / 16
1
11 / 811 / 16
13 / 16
11 / 415 / 16
13 / 87
11 / 21 / 16 19 / 16
15 / 811
13 / 41 / 16
17 /113 / 16
8115 / 16
2
21 / 8
21 / 4
23 / 8
21 / 2
25 / 8
23 / 4
327 / 8
31 / 8
31 / 433 / 8
31 / 2
35 / 8
33 / 4
437 / 8
41 / 8
41 / 4
43 / 8
41 / 2
45 / 8
43 / 447 / 8
551 / 8
51 / 4
53 / 8
51 / 2
55 / 8
53 / 457 / 8
6
�: Please iselect the fiirst columni by priority. Ani d select sei cond colui mn and third column if neci essary.

(25.4mm)

General size list of metric trapezoidal threads nit mm

When the tap for the trapezoidal threads not listed in the catalogue is required, please contance Yamawa sales.