Punch-Lok Hose Fittings Hex Steel Lok-Nipple Single Groove 1/2" x 3/8" HX-431 144S.

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-431

Hose Size 1/2"

Std. Pipe Thread 3/8"

Length 2 1/2"

No. of Grooves 1

Maximum Pressure 250 PSI