An Elbow 90° 1/4 NPT x 3/8 HS is a pipe fitting used to connect two pipes at a 90-degree angle.
1/4 NPT: This refers to the National Pipe Thread (NPT) male end of the fitting, with a 1/4 inch diameter.
3/8 HS: This likely refers to a 3/8 inch hose barb fitting on the other end. HS might stand for "hose swivel," indicating a rotating connection.
Common applications for this type of elbow include:
Hydraulic systems
Pneumatic systems
Fuel lines
Water lines