BSPT Male to RJT Male Adapter
A one-piece grade 316 stainless steel adapter connecting a tapered BSP male pipe thread (BSPT) to an RJT male union thread end. Machined wrench flats between the two threaded ends assist installation across nine listed sizes from 1/2 to 4 inches.
Connection | BSPT tapered male thread × RJT male union part |
|---|---|
Material | 316 stainless steel |
Body construction | One-piece dual-male transition adapter |
Listed size pairings | 1/2" (12.7x15NB) to 4" (101.6x100NB), nine combinations |
Tool engagement | External wrench flats between threaded ends |
Size
Product overview
Two male threads serving distinct joint systems
Although both ends of this one-piece adapter carry external threads, they belong to different connection systems and are not interchangeable. One end is a tapered BSP pipe thread (BSPT) designed to thread into a female BSP socket, while the opposite end is an RJT male union thread that receives an RJT union nut, liner and gasket.
Wrench flat spots for controlled tightening
The central section between the two threaded ends incorporates machined flat spots. These flats give an open-ended or adjustable spanner a positive grip on the body, preventing tool damage to either thread form during makeup or disassembly.
Thread sealing and union mating parts
On the BSPT side, joint sealing occurs along the tapered pipe threads using an appropriate thread sealant for the process medium. On the RJT union side, sealing takes place against the mating union seal compressed between the RJT male seat and the mating liner when the union nut is tightened.
Grade 316 material and nine listed size combinations
All nine catalog configurations from 1/2 inch (12.7x15NB) to 4 inches (101.6x100NB) are listed in grade 316 stainless steel. Check the specific Metric-by-NB pairing and overall axial dimension A on the reference chart to confirm both ends match the adjoining components.
Technical specifications
BSPT Male-to-RJT Male Adapter · sizes and dimensions
Only the listed combinations. Sizes are given as Metric×NB; A/B follow this drawing, with no unit added.
Units: Metric tube sizes and NB nominal thread sizes are listed separately.
| Inch size | Metric×NB | Body grade | A |
|---|---|---|---|
| 1/2" | 12.7x15NB | 316 | 57.8 |
| 3/4" | 19.05x20NB | 316 | 57.8 |
| 1" | 25.4x25NB | 316 | 70.8 |
| 1 1/4" | 31.8x32NB | 316 | 71 |
| 1 1/2" | 38.1x40NB | 316 | 71.5 |
| 2" | 50.8x50NB | 316 | 73 |
| 2 1/2" | 63.5x65NB | 316 | 85.7 |
| 3" | 76.2x80NB | 316 | 90 |
| 4" | 101.6x100NB | 316 | 92.1 |
Dimensional drawings
Need a different size, connection or document?
Discuss your requirements
