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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
High-Pressure Socket-Connect Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Water
- Temperature Range: -420° to 1200° F
- Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A269
These socket-connect fittings have the strength to handle high pressures up to 4,300 psi. Easier to weld than butt-weld fittings, they don’t need to align perfectly to tubing. Insert tubing into the socket end and weld to create a permanent, leak-tight connection. Fittings are 316 stainless steel for excellent corrosion resistance.
Straight Adapters, Tube × Male Threaded Pipe
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
| 1/4" | 1/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K231 | 000000 |
| 1/4" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K232 | 00000 |
| 3/8" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K233 | 00000 |
| 3/8" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K234 | 00000 |
| 3/8" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K235 | 00000 |
| 1/2" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K236 | 00000 |
| 1/2" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K237 | 00000 |
| 5/8" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K238 | 00000 |
| 3/4" | 3/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K239 | 00000 |
| 1" | 1 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K241 | 00000 |
Straight Adapters, Tube × Female Threaded Pipe
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
| 1/4" | 1/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K301 | 000000 |
| 1/4" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K302 | 00000 |
| 3/8" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K303 | 00000 |
| 3/8" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K304 | 00000 |
| 3/8" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K321 | 000000 |
| 1/2" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K305 | 00000 |
| 1/2" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K306 | 00000 |
| 5/8" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K307 | 00000 |
| 3/4" | 3/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K308 | 00000 |
| 1" | 1 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K322 | 000000 |
Straight Connectors, Tube
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K201 | 000000 |
| 3/8" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K202 | 00000 |
| 1/2" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K203 | 00000 |
| 3/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K205 | 00000 |
| 1" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K206 | 00000 |
90° Elbow Adapters, Tube × Female Threaded Pipe
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
| 1/4" | 1/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K311 | 000000 |
| 1/4" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K312 | 00000 |
| 3/8" | 1/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K313 | 00000 |
| 3/8" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K314 | 00000 |
| 1/2" | 3/8 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K315 | 00000 |
| 1/2" | 1/2 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K316 | 00000 |
| 3/4" | 3/4 | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K318 | 000000 |
90° Elbow Connectors, Tube
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K211 | 000000 |
| 3/8" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K212 | 00000 |
| 1/2" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K213 | 00000 |
| 3/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K215 | 000000 |
| 1" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K216 | 000000 |
Tee Connectors, Tube
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K221 | 000000 |
| 3/8" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K222 | 00000 |
| 1/2" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K223 | 00000 |
| 3/4" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K225 | 000000 |
| 1" | 316/316L Stainless Steel | 4,300 psi @ 72° F | 51255K226 | 000000 |
Socket-Connect Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Water
- Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A269
Easier to weld than butt-weld fittings, these fittings don’t need to align perfectly to tubing. Insert tubing into the socket end and weld to create a permanent, leak-tight connection. Fittings are 316 stainless steel for excellent corrosion resistance.
Straight Connectors, Tube
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K11 | 000000 |
| 3/8" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K12 | 00000 |
| 1/2" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K13 | 00000 |
| 3/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K14 | 00000 |
| 1" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K15 | 00000 |
90° Elbow Connectors, Tube
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K51 | 000000 |
| 3/8" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K52 | 00000 |
| 1/2" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K53 | 00000 |
| 3/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K54 | 00000 |
| 1" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K55 | 00000 |
180° Elbow Connectors, Tube
180° bend connectors are also known as U-bends.
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K61 | 000000 |
| 3/8" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K62 | 00000 |
| 1/2" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K63 | 00000 |
| 3/4" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K64 | 00000 |
| 1" | 316/316L Stainless Steel | 1,500 psi @ 72° F | 4048K65 | 00000 |