Thread Standard and Type
| R, PT, BSPT — 55° Taper Pipe Thread | |||
| R1/8 | R1/4 | R3/8 | R1/2 |
| NPT — 60° American Standard Taper Pipe Thread | |||
| NPT1/8 | NPT1/4 | NPT3/8 | NPT1/2 |
| Metric Thread | |||||||
| M5 x 0.8 | M6 x 1 | M8 x 1 | M10 x 1 | M12 x 1.25 | M14 x 1.5 | M16 x 1.5 | M20 x 1.5 |
Cautions in Application of Tube Joint
Metric Tube (mm)———-Thread (PT, R, BSPT)
| Item No. | Tube ΦD | Thread (PT, R, BSPT) |
| BDPK 04-M5 | 4mm | M5 |
| BDPK 04-M6 | 4mm | M6 |
| BDPK 04-01 | 4mm | R1/8 |
| BDPK 04-02 | 4mm | R1/4 |
| BDPK 06-M5 | 6mm | M5 |
| BDPK 06-M6 | 6mm | M6 |
| BDPK 06-01 | 6mm | R1/8 |
| BDPK 06-02 | 6mm | R1/4 |
| BDPK 06-03 | 6mm | R3/8 |
| BDPK 06-04 | 6mm | R1/2 |
| BDPK 08-01 | 8mm | R1/8 |
| BDPK 08-02 | 8mm | R1/4 |
| BDPK 08-03 | 8mm | R3/8 |
| BDPK 08-04 | 8mm | R1/2 |
| BDPK 10-01 | 10mm | R1/8 |
| BDPK 10-02 | 10mm | R1/4 |
| BDPK 10-03 | 10mm | R3/8 |
| BDPK 10-04 | 10mm | R1/2 |
| BDPK 12-01 | 12mm | R1/8 |
| BDPK 12-02 | 12mm | R1/4 |
| BDPK 12-03 | 12mm | R3/8 |
| BDPK 12-04 | 12mm | R1/2 |
| BDPK 14-03 | 14mm | R3/8 |
| BDPK 14-04 | 14mm | R1/2 |
| BDPK 16-02 | 16mm | R1/4 |
| BDPK 16-03 | 16mm | R3/8 |
| BDPK 16-04 | 16mm | R1/2 |
Inch Tube (inch)———-Thread (NPT)
| Item No. | Tube ΦD | Thread (NPT) |
| BDPK 5/32-N01 | 5/32″ | NPT1/8 |
| BDPK 5/32-N02 | 5/32″ | NPT1/4 |
| BDPK 1/4-N01 | 1/4″ | NPT1/8 |
| BDPK 1/4-N02 | 1/4″ | NPT1/4 |
| BDPK 1/4-N03 | 1/4″ | NPT3/8 |
| BDPK 1/4-N04 | 1/4″ | NPT1/2 |
| BDPK 5/16-N01 | 5/16″ | NPT1/8 |
| BDPK 5/16-N02 | 5/16″ | NPT1/4 |
| BDPK 5/16-N03 | 5/16″ | NPT3/8 |
| BDPK 5/16-N04 | 5/16″ | NPT1/2 |
| BDPK 3/8-N01 | 3/8″ | NPT1/8 |
| BDPK 3/8-N02 | 3/8″ | NPT1/4 |
| BDPK 3/8-N03 | 3/8″ | NPT3/8 |
| BDPK 3/8-N04 | 3/8″ | NPT1/2 |
| BDPK 1/2-N01 | 1/2″ | NPT1/8 |
| BDPK 1/2-N02 | 1/2″ | NPT1/4 |
| BDPK 1/2-N03 | 1/2″ | NPT3/8 |
| BDPK 1/2-N04 | 1/2″ | NPT1/2 |
Inch Tube (inch)———-Thread (PT, R, BSPT)
| Item No. | Tube ΦD | Thread (PT, R, BSPT) |
| BDPK 5/32-01 | 5/32″ | R1/8 |
| BDPK 5/32-02 | 5/32″ | R1/4 |
| BDPK 1/4-01 | 1/4″ | R1/8 |
| BDPK 1/4-02 | 1/4″ | R1/4 |
| BDPK 1/4-03 | 1/4″ | R3/8 |
| BDPK 1/4-04 | 1/4″ | R1/2 |
| BDPK 5/16-01 | 5/16″ | R1/8 |
| BDPK 5/16-02 | 5/16″ | R1/4 |
| BDPK 5/16-03 | 5/16″ | R3/8 |
| BDPK 5/16-04 | 5/16″ | R1/2 |
| BDPK 3/8-01 | 3/8″ | R1/8 |
| BDPK 3/8-02 | 3/8″ | R1/4 |
| BDPK 3/8-03 | 3/8″ | R3/8 |
| BDPK 3/8-04 | 3/8″ | R1/2 |
| BDPK 1/2-01 | 1/2″ | R1/8 |
| BDPK 1/2-02 | 1/2″ | R1/4 |
| BDPK 1/2-03 | 1/2″ | R3/8 |
| BDPK 1/2-04 | 1/2″ | R1/2 |