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| Nominal Size |
Walther Code |
Thread Size (inch) |
Pitch (threads per inch) |
| Male |
Female |
OD |
ID |
| 1/8" |
NP010 |
NP510 |
0.405 |
0.342 |
27 |
| 1/4" |
NP013 |
NP513 |
0.540 |
0.444 |
18 |
| 3/8" |
NP017 |
NP517 |
0.675 |
0.579 |
18 |
| 1/2" |
NP021 |
NP521 |
0.840 |
0.717 |
14 |
| 3/4" |
NP026 |
NP526 |
1.050 |
0.929 |
14 |
| 1" |
NP033 |
NP533 |
1.315 |
1.163 |
11-1/2 |
| 1-1/4" |
NP042 |
NP542 |
1.660 |
1.508 |
11-1/2 |
| 1-1/2" |
NP048 |
NP548 |
1.900 |
1.747 |
11-1/2 |
| 2" |
NP060 |
NP560 |
2.375 |
2.210 |
11-1/2 |
| 2-1/2" |
NP075 |
NP575 |
2.875 |
2.654 |
8 |
| 3 |
NP088 |
NP588 |
3.500 |
3.280 |
8 |
| 3-1/2" |
NP100 |
NP600 |
4.000 |
3.781 |
8 |
| 4 |
NP113 |
NP613 |
4.500 |
4.279 |
8 |
| 5 |
NP138 |
NP638 |
5.563 |
5.341 |
8 |
| 6 |
NP164 |
NP664 |
6.625 |
6.398 |
8 |
Walther code is NP for NPT, 0 or 1 for male thread, 5 or 6 for female, followed
by the actual (not nominal) thread OD in mm.
Contact one of our sales representatives today
to inquire about a quote from Maxbar - Walther Precision USA
or call us today at 513.527.4100
513.527.4100
