How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Screw-On Hose Fittings for Hydraulic Fluid
With just a vise and a wrench, make or repair hose assemblies in the field. These fittings thread directly onto hydraulic hose, so you don't need to crimp. To install, separate the two pieces. Screw the hose end onto your hose first and then thread the two pieces of the fitting back together. These fittings compress against the hose to form a strong seal. Also known as reusable fittings, they can be unscrewed from your hose and used again.
Fittings with an O-ring face seal end are also known as Seal-Lok fittings. They swivel until tightened for easy installation.
Zinc-plated steel fittings are stronger and resist wear and tear better than 316 stainless steel fittings. The zinc plating resists rusting in wet environments.
Parker 51R series fittings are easier to install if you use a vice jaw liner (sold separately) to firmly hold the end of your hose in place while you screw on the fitting.
Note: Fittings are only for use with hydraulic hose.
- Maximum Pressure: 2,250 psi @ 72° F
- Temperature Range: -40° to 212° F
- For Hose Manufacturer Series: Parker 510D and 518D J517 SAE 100R7
Fittings | Hose | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Hose | Per Ft. | Vice Jaw Liners | ||||||||||
| ID | OD | For Tube OD | Thread Size  | Thread Type | Dash Size | Each | 1-99 | 100-Up | Each | |||
Zinc-Plated Steel—Parker 51R Series | ||||||||||||
| 3/8" | 5/8" | 3/8" | 11/16"-16 | UN/UNF (ORFS) | 06 | 000000000 | 000000 | 0000000 | 00000 | 00000 | 000000000 | 000000 |
| 1/2" | 13/16" | 1/2" | 3/4"-16 | UN/UNF (ORFS) | 08 | 000000000 | 00000 | 0000000 | 0000 | 0000 | 000000000 | 00000 |