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Foster 66S-6, 3/4" Industrial Plug x 3/4" Male NPT, 6 Series, Free Swivel, Brass/Steel

Foster 66S-6, 3/4" Industrial Plug x 3/4" Male NPT, 6 Series, Free Swivel, Brass/Steel

by Foster
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$ 29.69
$ 29.69 - $ 29.69
$ 29.69
$ 23.79
$ 23.79 - $ 23.79
$ 23.79

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 66S-6 is a Brass/Steel 3/4" industrial plug from the Foster 6 Series — a high-flow quick coupler that interchanges with any 3/4"-body industrial-interchange half (ISO 6150-B / ANSI T3.20.14). Built in the USA for demanding shop air, tools, and production lines.

Specifications

  • Brand: Foster
  • Series: 6
  • Part Number: 66S-6
  • Interchange: 3/4" Industrial
  • Body: 3/4" Plug
  • Thread: 3/4" Male NPT, MPT
  • Valve Type: One-Way Shut-Off
  • Material: Brass/Steel
  • Operation: Free swivel under pressure (rotates to eliminate hose twist)
  • Working Pressure: 300 PSIG; vacuum to 27" Hg
  • Temperature Range: -40°F to +250°F
  • Seal: Buna-N (Nitrile)
  • Quantity: 1pc
  • Origin: Made in USA

Why this plug

  • Free swivel under pressure — which means the plug rotates freely to eliminate hose twist on blow guns, air tools, and end-drop applications.
  • Brass/Steel construction — which means it withstands repeated high-pressure cycling without deforming.
  • One-Way Shut-Off — which means the socket seals the supply line the instant the plug is removed, holding pressure and preventing blow-down.

Snap it on and the connection just holds — full 3/4" flow, no drips, no hiss. Built to take daily shop abuse and keep sealing leak-free, connection after connection.

Frequently asked questions

What does this connect to?
It mates with any 3/4"-body industrial-interchange coupler (ISO 6150-B / ANSI T3.20.14), the most common high-flow air-coupler standard in North America.

What pressure and temperature is it rated for?
300 PSIG working pressure (vacuum to 27" Hg connected), with a Buna-N (Nitrile) seal rated -40°F to +250°F.

How does the swivel help?
The plug swivels freely even under pressure, so the hose will not kink or twist on blow guns and air tools.

Ideal for high-flow shop air lines, pneumatic tools, and production equipment. Pair this plug with a matching 3/4" 6 Series coupler for a complete, leak-free connection.

Why buy from hpcouplers: Foster quality (an Ideal Tridon Group brand), backed by responsive US-based support, accurate specs, and fast shipping. Quick-coupling is what we do.