Compression-Tube-Stem Tube Fittings

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22 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.

Brass Compression Tube Fittings for Air and Water

For Use With: Air, Lubricated Air, Water
Temperature Range: See table
Tubing: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic or polyurethane rubber
Specifications Met: SAE J512, except metric sizes

A single sleeve (ferrule) compresses the tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings. They are brass for good corrosion resistance.

Straight Adapters with Center Stop, Tube Stem × Clamp-On Barbed Hose

Tube Stem OD, mm	For Hose ID, mm	Material	Max. Pressure	Temp. Range, °F		Each
4	4	Brass	2100 psi @ 72° F	-75° to 550°	3868N401	00000
6	4	Brass	2100 psi @ 72° F	-75° to 550°	3868N402	0000
6	7	Brass	2100 psi @ 72° F	-75° to 550°	3868N307	0000
8	7	Brass	1900 psi @ 72° F	-75° to 550°	3868N308	0000
8	10	Brass	1900 psi @ 72° F	-75° to 550°	3868N312	0000
10	10	Brass	1300 psi @ 72° F	-75° to 550°	3868N305	0000
12	10	Brass	1000 psi @ 72° F	-75° to 550°	3868N306	0000

Nuts

Short

For Use With:
Short nuts: Air, Water, Lubricated Air
Long nuts: Air, Water, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: See table
Tubing:
Short nuts: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic, or polyurethane rubber
Long nuts: Use with firm or hard (Durometer 1A-95A) copper, nylon plastic, polyethylene plastic, polypropylene plastic, or polyurethane rubber
Specifications Met: See table

For Tube
OD	Wall Thick.	Nut Material	Max. Pressure	Temp. Range, °F		Each
Short Nuts
4mm	1mm	Brass	2100 psi @ 72° F	-75° to 550°	3868N369	00000
6mm	1mm	Brass	2100 psi @ 72° F	-75° to 550°	3868N37	000

Sleeves

For Use With:
UL Listed sleeves: Air, Water, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
All other sleeves: Air, Water, Lubricated Air
Temperature Range: See table
Tubing:
UL Listed sleeves: Use with firm or hard (Durometer 1A-95A) copper, nylon plastic, polyethylene plastic, polypropylene plastic, or polyurethane rubber
All other sleeves: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic, or polyurethane rubber
Specifications Met: See table

For Tube		Sleeve
OD	Wall Thick.	Material	Max. Pressure	Temp. Range, °F		Each
4mm	1mm	Brass	2100 psi @ 72° F	-75° to 550°	3868N379	00000
6mm	1mm	Brass	2100 psi @ 72° F	-75° to 550°	3868N38	000

Precision Compression Fittings for Stainless Steel Tubing

For Use With: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
Temperature Range: -420° to 1200° F
Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Compatible With: Parker CPI

Made to tighter tolerances than other compression fittings, these are designed for high-precision applications. Also known as instrumentation fittings and flareless fittings. They come with a nut and a single sleeve (ferrule). The sleeve bites into tubing as you tighten the nut to create a strong seal. Fittings are 316 stainless steel for excellent corrosion resistance. A molybdenum disulfide coating on the nut acts as a lubricant for easy installation.

Straight Adapters, Tube Stem × Male NPT Threaded Pipe

Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.

Tube Stem OD	Pipe Size	Material	Max. Pressure		Each
1/8"	1/8	316 Stainless Steel	5,500 psi @ 72° F	8239K422	000000
1/8"	1/4	316 Stainless Steel	5,500 psi @ 72° F	8239K423	00000
1/4"	1/8	316 Stainless Steel	4,000 psi @ 72° F	8239K424	00000
1/4"	1/4	316 Stainless Steel	4,000 psi @ 72° F	8239K425	00000
1/4"	3/8	316 Stainless Steel	4,000 psi @ 72° F	8239K426	00000
3/8"	1/4	316 Stainless Steel	2,600 psi @ 72° F	8239K427	00000
3/8"	3/8	316 Stainless Steel	2,600 psi @ 72° F	8239K428	00000
3/8"	1/2	316 Stainless Steel	2,600 psi @ 72° F	8239K429	00000
1/2"	3/8	316 Stainless Steel	2,100 psi @ 72° F	8239K431	00000
1/2"	1/2	316 Stainless Steel	2,100 psi @ 72° F	8239K432	00000
3/4"	3/4	316 Stainless Steel	2,100 psi @ 72° F	8239K433	00000