OUR VERDICT
A standard manual 1/2" industrial air coupler. Buy it if your tools already use industrial-style plugs and you want a simple, long-wearing coupler at the hose end. Pick the automatic version if you connect and disconnect all day and want push-to-connect.
WHAT WE LIKE
- Made in the USA by Foster, heavy-duty industrial grade
- Industrial interchange, the most common air fitting profile in US shops
- Brass body with a steel sleeve for long wear
- One-way shut-off keeps air in the line when the plug is pulled
WORTH NOTING
- Manual sleeve: pull back to connect, pull back to release
- Not a universal coupler; it takes industrial-style plugs only
Specifications
| Series | 5 Series |
|---|---|
| Temperature range | -40°F to 250°F |
| Max working pressure | 300 PSI |
| Interchange | Industrial Interchange (I/M) |
| Component | Coupler (socket) |
| Body size | 1/2" |
| Body material | Brass |
| Seal material | Buna-N (NBR) |
| Socket action | Manual sleeve |
| 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 coupler (socket) in the Industrial Interchange (I/M) profile. It only mates with Industrial Interchange (I/M) plugs (nipples) — any brand.