OUR VERDICT
A standard 1/4" industrial interchange plug. This is the plug most US air couplers accept. Check your coupler style before ordering; if it is an ARO or Tru-Flate coupler, it needs a matching plug or a universal coupler.
WHAT WE LIKE
- Made in the USA by Foster, heavy-duty industrial grade
- Industrial interchange, fits the most common 1/4" air couplers in US shops
- One-piece plated steel or brass body
- Available in NPT, hose barb and push-on ends
WORTH NOTING
- Industrial-style only; it will not fit ARO, Lincoln or Tru-Flate couplers unless the coupler is a universal
- Steel plugs will show surface rust outdoors; use brass there
Specifications
| Series | 3 Series |
|---|---|
| Temperature range | -40°F to 250°F |
| Max working pressure | 300 PSI |
| Interchange | Industrial Interchange (I/M) |
| Component | Plug (nipple) |
| Body size | 1/4" |
| Body material | Steel (zinc-plated) |
| Valving | One-way valved |
Industrial Interchange (I/M) — also sold as Milton M-style / Type D. Any brand's plug or coupler in this profile fits this part. Not compatible with ARO or Tru-Flate.Full interchange lookup →
Complete the connection
This is a plug (nipple) in the Industrial Interchange (I/M) profile. It only mates with Industrial Interchange (I/M) couplers (sockets) — any brand.