
| Tappi Pro Ta Surfa | ng conditions duct symbol p material ce treatment | Rc HSS | PT HSS | PT-X HSS | S-PT HSS | SP-PT HSS | SP-S-PT HSS | SP-PT-X HSS | LS-PT HSS | LS-S-PT HSS |
| Name | For taper pip | e threads; Fo | r general us | e | For taper p Long, for | ipe threads; general use | ||||
| Bored For M For Ui | Hole Shape etric Threads nified Threads | |||||||||
| For Whi | tworth Threads | |||||||||
| For Screw Threads Pip | used on Sewing Machines e Threads | ⑧-13 | ⑧-14 | ⑧-16 | ⑧-17 | ⑧-21 | ⑧-22 | ⑧-23 | ⑧-19 | ⑧-20 |
| America | n Pipe Threads | |||||||||
| For Min | iature Threads | |||||||||
| For Trap | ezoidal Threads | |||||||||
| ~S25C | Low carbon steels | ◆ ◎ | ◆ ◎ | ◆ ◎ | ||||||
| S25C~S45C | Medium carbon steels | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ | ◆ ◎ |
| S45C~ | High carbon steels | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ |
| SCM | Alloy steels | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | ◆ ○ | |||
| 25~35HRC | Heat treated steel | |||||||||
| 35~45HRC | Heat treated steel | |||||||||
| 45~55HRC | Heat treated steel | |||||||||
| 55~63HRC | Heat treated steel | |||||||||
| SUS | Stainless steels(SUS) | |||||||||
| SKD | Tool steels | |||||||||
| SC | Cast steels | |||||||||
| FC | Cast irons | |||||||||
| FCD | Ductile cast irons | |||||||||
| Cu | Copper | |||||||||
| Bs | Brass | |||||||||
| BsC | Brass castings | |||||||||
| PB | Bronze | |||||||||
| AL | Wrought aluminum | |||||||||
| AC, ADC | Wrought aluminum | |||||||||
| Mg | Magnesium alloy die castings | |||||||||
| ZDC | Zinc alloy die castings | |||||||||
| Titanium alloys | ||||||||||
| Nickel base alloys | ||||||||||
| Thermosetting plastic | ||||||||||
| Thermoplastic resin |
PT AUSP Rc PT
| For taper pipe threads | For taper | For taper pipe threads | |
| left-hand threads | coated | interrupted |