Pipe Locknuts For Hydraulic Fluid

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Material

303 Stainless Steel

PTFE

Steel

System of Measurement

Pipe Size

Thread Type

Fitting Type

For Use With

Pipe Material

Hex Width

Maximum Pressure @ Temperature

Length

Pipe Schedule

Dash Size

Flange Material

Steel

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Maximum Temperature

Minimum Temperature

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

RoHS

Compliant

Compliant with Exemptions

Finish

Galvanized

For Flange Class

1500

Maximum Steam Pressure @ Temperature

Weight

Fabrication

18 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.

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.

303 stainless steel fittings have very good corrosion resistance.

Locknuts have a gasket, which creates a tight seal without the need for PTFE tape; screw one onto the male end of a fitting for extra holding power.

Locknuts

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Water
Temperature Range: -300° to 500° F

						303 Stainless Steel
Pipe Size	Dash Size	Hex Wd.	Lg.	Gasket Material	Max. Pressure		Each
NPT Female
1/8	02	5/8"	3/16"	PTFE Plastic	10,000 psi @ 72° F	5530K37	000000
1/4	04	3/4"	9/32"	PTFE Plastic	10,000 psi @ 72° F	5530K38	00000
3/8	06	7/8"	9/32"	PTFE Plastic	10,000 psi @ 72° F	5530K39	00000
1/2	08	1 1/8"	19/64"	PTFE Plastic	10,000 psi @ 72° F	5530K44	00000
3/4	12	1 5/16"	19/64"	PTFE Plastic	5,000 psi @ 72° F	5530K45	000000
1	16	1 5/8"	25/64"	PTFE Plastic	5,000 psi @ 72° F	5530K46	000000
1 1/4	20	2"	25/64"	PTFE Plastic	5,000 psi @ 72° F	5530K47	000000
1 1/2	24	2 1/4"	25/64"	PTFE Plastic	3,000 psi @ 72° F	5530K48	000000
2	32	2 3/4"	27/64"	PTFE Plastic	3,000 psi @ 72° F	5530K49	000000

Extreme-Pressure Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

Galvanized and zinc-plated steel fittings have better corrosion resistance than plain steel fittings. PTFE-coated steel fittings have better corrosion resistance than galvanized and zinc-plated steel fittings.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

Locknuts

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Temperature Range: -100° to 500° F
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	02	10,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K14	000000
1/4	04	10,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K16	00000
3/8	06	10,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K18	00000
1/2	08	10,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K19	00000
3/4	12	5,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K21	00000
1	16	5,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K23	00000
1 1/4	20	5,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K25	00000
1 1/2	24	3,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K27	00000
2	32	3,000 psi @ 72° F	5,000 psi @ 500° F	Galvanized Steel	5530K29	000000