Ralston Tube Fitting Quick-test Adapters
Fractional tube fitting × Quick-test adapters (1/8" to 1/2", brass or stainless) — connect tube runs to a Quick-test hose
Pick your exact configuration in the ordering table below to add it to your cart.
Same-day response on quotes. ISO/IEC 17025 accredited calibration available.
Overview
Tube Fitting Quick-test adapters connect a fractional tube fitting to a Quick-test hose so you can plumb a tube run into a calibration hose without a wrench on the hose side.
- Fractional tube sizes: 1/8", 1/4", 3/8" and 1/2"
- Brass or stainless steel
- Male Quick-test hose end (1/8" stainless is a quick-connect style)
- Made in USA
OEM models also list metric tube adapters (QTHA-MTB0-*); those SKUs are not in our 2026 portal list, so they are not on this page — ask at quote.
Part of the Ralston Quick-test system of safe, stable, leak-free connections.
Shipping and tax are confirmed when we review your order.
OEM family: Tube Fitting Quick-test Adapters (https://www.ralstoninst.com/tube-fitting-quick-test-adapters).
Specifications
| Family | Tube Fitting Quick-test Adapters |
| Process connection | Fractional tube fitting (1/8"–1/2") |
| Hose connection | Male Quick-test |
| Materials | Brass or stainless steel |
| Country of origin | USA |
Build your part number
Configure your QTHA-TUBE
Pick your options and we'll build the exact part number with a list-price estimate.
Select a model to build your part number.
Choose tube size and material. Metric tube adapters (MTB0) are not in this picker — ask at quote if you need them. Shipping and tax are confirmed when we review your order.
Ordering information
7 ordering models available.
| Model | Description | List Price | |
|---|---|---|---|
| QTHA-1TS0-QD | 1/8" tube fitting x male Quick-test, no check-valve, S.S. | $97.07 | |
| QTHA-2TB0 | 1/4" tube fitting x male Quick-test, no check-valve, brass | $18.94 | |
| QTHA-2TS0 | 1/4" tube fitting x male Quick-test, no check-valve, S.S. | $54.61 | |
| QTHA-3TB0 | 3/8" tube fitting x male Quick-test, no check-valve, brass | $21.23 | |
| QTHA-3TS0 | 3/8" tube fitting x male Quick-test, no check-valve, S.S. | $77.91 | |
| QTHA-4TB0 | 1/2" tube fitting x male Quick-test, no check-valve, brass | $32.17 | |
| QTHA-4TS0 | 1/2" tube fitting x male Quick-test, no check-valve, S.S. | $89.82 |
Related products
Official compatibility and accessories for this model - not look-alike suggestions.
