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Stainless steel male and female adapter fittings. Available in Imperial and Metric tube OD with NPT, BSPT, BSPP, RP, RG and SAE/MS thread types.
| Part Number | Fitting Type | Tube OD | Thread Size | Thread Type | |
|---|---|---|---|---|---|
| PFA-02-2G-SS | Female Adapter (PFA) | 1/8(in) | 1/8 | BSPP | |
| PFA-02-2N-SS | Female Adapter (PFA) | 1/8(in) | 1/8 | NPT | |
| PFA-02-2R-SS | Female Adapter (PFA) | 1/8(in) | 1/8 | BSPT | |
| PFA-02-4G-SS | Female Adapter (PFA) | 1/8(in) | 1/4 | BSPP | |
| PFA-02-4N-SS | Female Adapter (PFA) | 1/8(in) | 1/4 | NPT | |
| PFA-02-4R-SS | Female Adapter (PFA) | 1/8(in) | 1/4 | BSPT | |
| PFA-03-2N-SS | Female Adapter (PFA) | 3/16(in) | 1/8 | NPT | |
| PFA-03-2R-SS | Female Adapter (PFA) | 3/16(in) | 1/8 | BSPT | |
| PFA-03-4N-SS | Female Adapter (PFA) | 3/16(in) | 1/4 | NPT | |
| PFA-03-4R-SS | Female Adapter (PFA) | 3/16(in) | 1/4 | BSPT | |
| PFA-04-2G-SS | Female Adapter (PFA) | 1/4(in) | 1/8 | BSPP | |
| PFA-04-2G-SS | Female Adapter (PFA) | 1/4(in) | 1/8 | RG | |
| PFA-04-2N-SS | Female Adapter (PFA) | 1/4(in) | 1/8 | NPT | |
| PFA-04-2R-SS | Female Adapter (PFA) | 1/4(in) | 1/8 | BSPT | |
| PFA-04-2RP-SS | Female Adapter (PFA) | 1/4(in) | 1/8 | RP | |
| PFA-04-4G-SS | Female Adapter (PFA) | 1/4(in) | 1/4 | BSPP | |
| PFA-04-4G-SS | Female Adapter (PFA) | 1/4(in) | 1/4 | RG | |
| PFA-04-4N-SS | Female Adapter (PFA) | 1/4(in) | 1/4 | NPT | |
| PFA-04-4R-SS | Female Adapter (PFA) | 1/4(in) | 1/4 | BSPT | |
| PFA-04-4RP-SS | Female Adapter (PFA) | 1/4(in) | 1/4 | RP | |
| PFA-04-6N-SS | Female Adapter (PFA) | 1/4(in) | 3/8 | NPT | |
| PFA-04-6R-SS | Female Adapter (PFA) | 1/4(in) | 3/8 | BSPT | |
| PFA-04-8N-SS | Female Adapter (PFA) | 1/4(in) | 1/2 | NPT | |
| PFA-04-8R-SS | Female Adapter (PFA) | 1/4(in) | 1/2 | BSPT | |
| PFA-05-2N-SS | Female Adapter (PFA) | 5/16(in) | 1/8 | NPT |
A tube adapter has a machined tube stub on one end, sized to a standard tube OD, and a pipe thread on the other. The stub inserts into any twin-ferrule fitting of the same tube size and is made up with a nut and ferrules exactly as tubing would be. This lets a threaded component, such as a valve, gauge or filter, be connected directly into a tube fitting without a separate length of tube and a connector.
The male adapter (PMA) carries an external pipe thread for screwing into a port. The female adapter (PFA) carries an internal thread to receive a male-threaded part. Thread options are NPT, BSPT, BSPP, RP, RG and SAE/MS, so the adapter can be matched to American, British and ISO-standard equipment. As with all threaded connections, tapered threads seal on the thread with sealant or tape, while parallel threads rely on a washer or O-ring.
Adapters are SS316 and available in both imperial and metric tube OD. They are often used to shorten an assembly, reduce the number of joints in a hook-up, or convert between tube size and thread size on instrumentation and process systems.
