This brass elbow screw in connection is designed with female threads and a compression ring connection. Connection 1 has R 1/4 inch threads.
LTWFITTING 1/2 in. O.D. x 1/4 in. MIP Brass Compression 90-Degree Elbow Fitting (5-Pack) HF698405 - The Home Depot
Male Union Brass Compression Fittings
Sioux Chief 3/4 inch x 1/2 inch Plastic 90-Degree Barb x MIP Elbow
LTWFITTING 1/2 in. O.D. x 1/4 in. MIP Brass Compression 90-Degree Elbow Fitting (5-Pack) HF698405 - The Home Depot
Supplies Gas Fittings Brass Fittings
1/4 FPT x 1/4 MPT, Brass Pipe 90 deg Street Elbow - 3400X4 - Hi-Line Inc.
Crane Fluid Systems Product Directory - Issue 4 by Crane BS&U - Issuu
1/4 FPT x 1/4 MPT, Brass Pipe 90 deg Street Elbow - 3400X4 - Hi-Line Inc.
WATERLINE PRODUCTS Compression Brass 90° Elbow
LTWFITTING 5/16 in. I.D. x 1/4 in. MIP Brass Hose Barb 90-Degree Elbow Fittings (25-Pack) HFLF3204025 - The Home Depot
DOT Compression style fittings for repairing truck and trailer air brake lines For Use in air brake Systems on semi-trucks, trailers, buses, mobile
Legines Brass DOT Air Brake 90 Degree Male Elbow Fitting, Connect 3/4 OD Nylon Tubing to 1/2 NPT Male Pipe, 2 pcs
DOT Compression style fittings for repairing truck and trailer air brake lines For Use in air brake Systems on semi-trucks, trailers, buses, mobile
Legines Brass DOT Air Brake 90 Degree Male Elbow Fitting, Connect 3/4 OD Nylon Tubing to 1/2 NPT Male Pipe, 2 pcs
LTWFITTING 90 Degree Elbow Brass Barb Fitting 1/4 ID Hose x 1/4-Inch Male NPT Air(Pack of 5) - Pipe Fittings
LTWFITTING 1/2 in. O.D. x 1/4 in. MIP Brass Compression 90-Degree Elbow Fitting (5-Pack) HF698405 - The Home Depot