Screw-On Parker Series 51R Fittings

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19 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

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 a female tube end swivel 360° until tightened for easy installation.

Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings.

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.

NPTF (Dryseal) threads are compatible with NPT threads.

Note: Fittings are only for use with hydraulic hose.

Straight Adapters, Screw-On Hose × Male Threaded Pipe

Maximum Pressure: See table
Temperature Range: -40° to 212° F
For Hose Manufacturer Series:
Parker 42 Series Fittings: Parker 422 SAE J517 100R1AT
Parker 30 Series Fittings: Parker 302 SAE J517 100R2AT
Parker 51R Series Fittings: Parker 510D and 518D J517 SAE 100R7

Fittings								Hose
For Hose									Per Ft.		Vice Jaw Liners
ID	OD	Pipe Size	Thread Type	Dash Size	Max. Pressure		Each		1-99	100-Up		Each
Zinc-Plated Steel—Parker 51R Series
3/16"	7/16"	1/4	NPT	04	3,250 psi @ 72° F	52305K101	000000	5201K02	00000	00000	52305K201	000000
1/4"	1/2"	1/4	NPT	04	3,000 psi @ 72° F	52305K102	00000	5201K03	0000	0000	52305K201	00000
3/8"	5/8"	3/8	NPTF	06	2,250 psi @ 72° F	52305K103	00000	5201K65	0000	0000	52305K201	00000
1/2"	13/16"	1/2	NPTF	08	2,250 psi @ 72° F	52305K104	00000	5201K06	0000	0000	52305K201	00000

Straight Adapters, Screw-On Hose × Male 37° Flared Tube

Maximum Pressure: See table
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	Max. Pressure		Each		1-99	100-Up		Each
Zinc-Plated Steel—Parker 51R Series
3/16"	7/16"	1/4"	7/16"-20	UN/UNF (JIC)	04	3,250 psi @ 72° F	52305K105	000000	5201K02	00000	00000	52305K201	000000
1/4"	1/2"	1/4"	7/16"-20	UN/UNF (JIC)	04	3,000 psi @ 72° F	52305K106	00000	5201K03	0000	0000	52305K201	00000
3/8"	5/8"	3/8"	9/16"-18	UN/UNF (JIC)	06	2,250 psi @ 72° F	52305K107	00000	5201K65	0000	0000	52305K201	00000
1/2"	13/16"	1/2"	3/4"-16	UN/UNF (JIC)	08	2,250 psi @ 72° F	52305K108	00000	5201K06	0000	0000	52305K201	00000

Straight Adapters, Screw-On Hose × Female 37° Flared Tube

Maximum Pressure: See table
Temperature Range: -40° to 212° F
For Hose Manufacturer Series:
Parker 42 Series Fittings: Parker 422 SAE J517 100R1AT
Parker 30 Series Fittings: Parker 302 SAE J517 100R2AT
Parker 51R Series Fittings: Parker 510D and 518D J517 SAE 100R7
Specifications Met: See table

Fittings									Hose
For Hose										Per Ft.		Vice Jaw Liners
ID	OD	For Tube OD	Thread Size	Thread Type	Dash Size	Max. Pressure		Each		1-99	100-Up		Each
Zinc-Plated Steel—Parker 51R Series
3/16"	7/16"	1/4"	7/16"-20	UN/UNF (JIC)	04	3,250 psi @ 72° F	52305K109	000000	5201K02	00000	00000	52305K201	000000
1/4"	1/2"	1/4"	7/16"-20	UN/UNF (JIC)	04	3,000 psi @ 72° F	52305K111	00000	5201K03	0000	0000	52305K201	00000
3/8"	5/8"	3/8"	9/16"-18	UN/UNF (JIC)	06	2,250 psi @ 72° F	52305K112	00000	5201K65	0000	0000	52305K201	00000
1/2"	13/16"	1/2"	3/4"-16	UN/UNF (JIC)	08	2,250 psi @ 72° F	52305K113	00000	5201K06	0000	0000	52305K201	00000

Straight Adapters, Screw-On Hose × O-Ring Face Seal

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	52305K114	000000	5201K65	00000	00000	52305K201	000000
1/2"	13/16"	1/2"	3/4"-16	UN/UNF (ORFS)	08	52305K115	00000	5201K06	0000	0000	52305K201	00000