Punch-Lok Hose Fittings Hex Steel Lok-Nipple Double Groove 3/8"x1/4" HX-322 144O.

You get 4 each of these you see in the picture.
 

Punch-Lok™ single and double groove hose fittings of all types are designed and engineered for use with Punch-Lok™ clamps to make connections which will withstand high pressure services.

The shape of the grooves eliminates damage to the inner wall of the hose.

The Punch-Lok™ clamp brings the hose wall into the grooves with even compression around the fittings.

 

Part Name HX-322

Hose Size 3/8"

Std. Pipe Thread 1/4"

Length 3 1/2"

No. of Grooves 2

Maximum Pressure 250 PSI