Seals for Oxygen | McMaster-Carr

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100 Products

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.

About Sealant Flexibility

Designed to withstand extreme environments, these Viton® fluoroelastomer sealants have excellent resistance to sulfuric acid, hydrochloric acid, nitric acid, gasoline, fuels, and crude oil. They’re non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation and joint expansion/compression tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.

Container
Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Elongation	Joint Compression/ Expansion Tolerance	Tensile Strength, psi	Hardness	Temp. Range, °F	For Joining	Color		Each
Viton® Fluoroelastomer
2.5	Cartridge	5 min.	3 days	300%	-25% to 25%	700	Medium Hard (Durometer 65A)	-40° to 400°	Metal, Masonry	Black	00000000	000000
11	Cartridge	5 min.	3 days	300%	-25% to 25%	700	Medium Hard (Durometer 65A)	-40° to 400°	Metal, Masonry	Black	00000000	000000

Self-Leveling Chemical-Resistant Sealants

Designed to withstand extreme environments, these fluoroelastomer sealants have excellent resistance to sulfuric acid, hydrochloric acid, nitric acid, gasoline, and oil. Thinner than non-sagging sealants, these flow easily into cracks and have a smooth finish.

Sealants that cannot be sold to the regions listed exceed local regulatory limits on VOCs (volatile organic compounds).

Container
Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Elongation	Joint Compression/ Expansion Tolerance	Tensile Strength, psi	Hardness	Temp. Range, °F	Color	For Joining		Each
Fluoroelastomer
32	Can	5 min.	3 days	150%	-5% to 5%	600	Hard (Durometer 85A)	-40° to 400°	Gray	Metal, Masonry	00000000	0000000
32	Can	5 min.	3 days	450%	-15% to 15%	750	Medium Hard (Durometer 65A)	-40° to 400°	Gray	Metal, Masonry	00000000	000000
Viton® Fluoroelastomer
2.5	Cartridge	5 min.	3 days	400%	-25% to 25%	1,000	Medium Hard (Durometer 60A)	-40° to 400°	Black	Metal, Masonry	00000000	00000
11	Cartridge	5 min.	3 days	400%	-25% to 25%	1,000	Medium Hard (Durometer 60A)	-40° to 400°	Black	Metal, Masonry	00000000	000000

Reusable Non-Hardening Thread Sealants for Fine Threads

Formulated to flow into small spaces, use these sealants between fine threads. Threads coated with these sealants can be installed multiple times without recoating. They have low locking strength, so they prevent threads from loosening due to vibration and can be adjusted without tools. They meet NSF/ANSI 61 for use with drinking water.

Container		Max. Pressure, psi
Size, fl. oz.	Type	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Consistency	Specifications Met	Choose a Color		Each
Low Locking Strength
2	Brush-Top Bottle	10,000	300	-65° to 300°	4"	Thick Liquid	NSF/ANSI 61	Orange, White	000000	000000

Reusable Non-Hardening Thread Sealants for Coarse Threads

Much thicker than sealants for fine threads, these sealants bridge the gaps between coarse threads. Threads coated with these sealants can be installed multiple times without recoating. They have low locking strength, so they prevent threads from loosening due to vibration and can be adjusted without tools. They meet NSF/ANSI 61 for use with drinking water.

Container		Max. Pressure, psi
Size, fl. oz.	Type	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Consistency	Specifications Met	Choose a Color		Each
Low Locking Strength
2	Brush-Top Bottle	10,000	300	-65° to 300°	4"	Thick Liquid	NSF/ANSI 61	Orange, White	000000	000000

Thread Sealants for Oxygen Systems

Completely free of oil and chemically inert, these sealants are safe to use with wet and dry oxygen systems. They contain PTFE, which provides a slippery surface that keeps threads from binding. These sealants are non-hardening, remaining pliable enough to self-heal and stop leaks before they start, so they’re often used in high-vibration applications that could cause standard thread sealants to fail. Since they have low locking strength, these sealants can be adjusted without tools.

The sealant in a tube is a good alternative to thread sealant tape—like tape, it forms PTFE strings between tightened threads, but excess material liquefies, so it won’t clog system components downstream.

Container		Max. Pressure, psi
Size, fl. oz.	Type	For Fluids	For Gases	Temp. Range, °F	Max. Temp. for Oxygen, °F	For Max. Thread Dia.	Consistency	Color		Each
Low Locking Strength
3.5	Tube	10,000	10,000	-400° to 500°	140°	6"	Paste	White	000000	000000
3.5	Jar	10,000	10,000	-450° to 550°	140°	6"	Paste	Green	000000	000000

Non-Hardening High-Temperature Thread Sealants

Often used in high-vibration applications that could cause standard thread sealants to fail, these never fully harden and remain pliable enough to self-heal and stop leaks before they start. They have low locking strength, so they can be adjusted without tools.

Container		Max. Pressue, psi
Size, fl. oz.	Type	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Consistency	Color		Each
Low Locking Strength
Sealants
4.4	Tube	2,300	2,300	Not Rated to 1100°	2"	Paste	Black	000000	000000

High-Temperature Thread Sealants

These sealants have high locking strength, so they work in demanding applications, such as securing mounting studs in motor housings.

Room-temperature cure sealants must be mixed with water for use; they harden as the water evaporates. Mix about five parts powdered-sealant to one part water to form a thick consistency similar to peanut butter. Hardening can be accelerated with heat; do not heat to above 200° F. They require a hand tool to unthread.

1000° F max. temp. sealants expand as they harden.

1500° F max. temp. sealants are for use on cement-lined pipe joints prior to welding. The heat from the welding torch helps them begin to harden.

Container					Max. Pressure, psi
Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Mix Ratio	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Consistency	Specifications Met	Color		Each
High Locking Strength
Room-Temperature Cure X-Pando Sealants
14	Can	60 min.	24 hrs.	5:1	5,000	5,000	-300° to 1000°	6"	Powder	NSF/ANSI 61	Gray	0000000	000000
14	Can	60 min.	24 hrs.	5:1	5,000	5,000	-300° to 1500°	6"	Powder	NSF/ANSI 61	Gray	0000000	00000
70	Can	60 min.	24 hrs.	5:1	5,000	5,000	-300° to 1000°	6"	Powder	NSF/ANSI 61	Gray	0000000	00000
70	Can	60 min.	24 hrs.	5:1	5,000	5,000	-300° to 1500°	6"	Powder	NSF/ANSI 61	Gray	0000000	00000

Thread Sealant Tape

Made of PTFE, this tape has a slippery surface that keeps threads from binding to make parts easy to assemble.

PTFE tape with graphite creates a better seal between threads than plain PTFE tape, which helps prevent fluid and gas leaks. The graphite attaches to the PTFE, so this tape does not emit harmful VOCs.

			Max. Pressure, psi
Mfr. Model No.	Wd.	Lg., yd.	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Color		Each
3M PTFE
0.003" Thick.
547	1/4"	36	Not Rated	Not Rated	-40° to 170°	6"	White	0000000	000000
547	3/8"	36	Not Rated	Not Rated	-40° to 170°	6"	White	0000000	00000
547	1/2"	36	Not Rated	Not Rated	-40° to 170°	6"	White	0000000	00000
547	1"	36	Not Rated	Not Rated	-40° to 170°	6"	White	0000000	00000

			Max. Pressure, psi							Each
Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Specifications Met	Color		1-11	12-Up
PTFE
0.0032" Thick.
1/4"	14	0.7	10,000	10,000	-450° to 550°	1/2"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	00000	00000
3/8"	14	0.7	10,000	10,000	-450° to 550°	3/4"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	0000	0000
1/2"	14	0.7	10,000	10,000	-450° to 550°	1"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	0000	0000
3/4"	14	0.7	10,000	10,000	-450° to 550°	1 1/2"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	0000	0000
1"	14	0.7	10,000	10,000	-450° to 550°	2"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	0000	0000
1 1/2"	14	0.7	10,000	10,000	-450° to 550°	3"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	0000	0000
2"	14	0.7	10,000	10,000	-450° to 550°	4"	FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed	White	0000000	00000	00000

			Max. Pressure, psi
Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Color		Each
ePTFE with Graphite
0.002" Thick.
5/8"	27	0.8	2,900	2,900	-400° to 500°	1 1/4"	Gray	0000000	000000

High-Density Thread Sealant Tape

This tape has a higher density than standard tape for a better seal between threads. Made of PTFE, it has a slippery surface that keeps threads from binding to make parts easy to assemble.

				Max. Pressure, psi
Mfr. Model No.	Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Color		Each
3M PTFE
0.003" Thick.
48	1/2"	7	1.3	Not Rated	Not Rated	-450° to 400°	6"	White	0000000	000000

			Max. Pressure, psi							Each
Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Specifications Met	Color		1-11	12-Up
PTFE
0.0032" Thick.
1/4"	14	1.2	10,000	10,000	-450° to 550°	1/2"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
1/4"	14	1.2	10,000	10,000	-450° to 550°	1/2"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	0000	0000
3/8"	14	1.2	10,000	10,000	-450° to 550°	3/4"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	0000	0000
3/8"	14	1.2	10,000	10,000	-450° to 550°	3/4"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	0000	0000
1/2"	14	1.2	10,000	10,000	-450° to 550°	1"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	0000	0000
1/2"	14	1.2	10,000	10,000	-450° to 550°	1"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	0000	0000
3/4"	14	1.2	10,000	10,000	-450° to 550°	1 1/2"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	0000	0000
3/4"	14	1.2	10,000	10,000	-450° to 550°	1 1/2"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	0000	0000
1"	14	1.2	10,000	10,000	-450° to 550°	2"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	00000	0000
1"	14	1.2	10,000	10,000	-450° to 550°	2"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	00000	00000
1 1/2"	14	1.2	10,000	10,000	-450° to 550°	3"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
1 1/2"	14	1.2	10,000	10,000	-450° to 550°	3"	MIL-T-27730 UL Listed C-UL Listed MIL-A-A-58092 Type II	Gray	0000000	00000	00000
2"	14	1.2	10,000	10,000	-450° to 550°	4"	MIL-T-27730 FDA Compliant 21 CFR 177.1550 UL Listed C-UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
0.0035" Thick.
1/4"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	0000
3/8"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
1/2"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
3/4"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
1"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
1 1/2"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000
2"	14	1.9	10,000	10,800	-450° to 550°	6"	MIL-T-27730 FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed MIL-A-A-58092 Type II	White	0000000	00000	00000

			Max. Pressure, psi							Each
Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Specifications Met	Color		1-11	12-Up
PTFE with Nickel Filler
0.0035" Thick.
1/4"	14	1.4	10,000	10,000	-450° to 550°	1/2"	UL Listed C-UL Listed	Gray	00000000	00000	00000
3/8"	14	1.4	10,000	10,000	-450° to 550°	3/4"	UL Listed C-UL Listed	Gray	00000000	00000	0000
1/2"	14	1.4	10,000	10,000	-450° to 550°	1"	UL Listed C-UL Listed	Gray	00000000	00000	0000
3/4"	14	1.4	10,000	10,000	-450° to 550°	1 1/2"	UL Listed C-UL Listed	Gray	00000000	00000	00000
1"	14	1.4	10,000	10,000	-450° to 550°	2"	UL Listed C-UL Listed	Gray	00000000	00000	00000
0.004" Thick.
1/4"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000
3/8"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000
1/2"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000
3/4"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000
1"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000
2"	14	1.9	10,500	11,500	-450° to 550°	6"	FDA Compliant 21 CFR 175.105 FDA Compliant 21 CFR 177.2600 UL Listed	White	0000000	00000	00000

Choose-a-Color High-Density Thread Sealant Tape

Use color to identify water, gas, and chemical connections. This tape has a higher density than standard tape for a better seal between threads. Made of PTFE, it has a slippery surface that keeps threads from binding to make parts easy to assemble.

			Max. Pressure, psi							Each
Wd.	Lg., yd.	Density, g/cm³	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Specifications Met	Choose a Color		1-11	12-Up
PTFE
0.0032" Thick.
1/4"	14	1.2	10,000	10,000	-450° to 550°	1/2"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	00000	00000
3/8"	14	1.2	10,000	10,000	-450° to 550°	3/4"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	0000	0000
1/2"	14	1.2	10,000	10,000	-450° to 550°	1"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	0000	0000
3/4"	14	1.2	10,000	10,000	-450° to 550°	1 1/2"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	0000	0000
1"	14	1.2	10,000	10,000	-450° to 550°	2"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	00000	0000
1 1/2"	14	1.2	10,000	10,000	-450° to 550°	3"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	00000	00000
2"	14	1.2	10,000	10,000	-450° to 550°	4"	MIL-A-A-58092 Type II MIL-T-27730 UL Listed	Green, Orange, Red, Yellow	00000000	00000	00000

Threaded Hose Fittings for Compressed Gas

Use these fittings to connect welding hose to pressure regulators and torches. They are also known as CGA (Compressed Gas Association) fittings. Fittings are brass for good corrosion resistance.

Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.

For technical drawings and 3-D models, click on a part number.

Caps, Female Hose

Maximum Pressure: 200 psi @ 72° F
Maximum Temperature: 120° F

Brass
CGA Number	Gas Fitting Size	Thread Size	Thread Type	Thread Direction	Chain Lg.	For Use With		Each
022	B	9/16"-18	UN/UNF (CGA)	Right Hand	6"	Oxygen	0000000	00000

Quick-Install Pressure Test Fittings


	NPT Female Inlet × NPT Male Outlet Adapter with Intermittent Swivel	NPT Male Inlet × NPT Female Outlet Adapter
	NPT Male Inlet × NPT Female Outlet Adapter with Intermittent Swivel	NPT Male Inlet Plug

Thread these fittings onto your testing equipment by hand for a secure connection in testing applications—no tools, tape, or sealant required. Use them with gauges and other equipment as a temporary connection. When pressure is applied, the O-ring on the outlet presses against the testing equipment, creating a tight seal.

Adapters with intermittent swivel rotate 360° until tightened for easy installation.

For technical drawings and 3-D models, click on a part number.

NPT Female Inlet × NPT Male Outlet Adapter with Intermittent Swivel
Pipe Size	Max. Pressure, psi	Temperature Range, °F	Gasket Material	For Use With		Each
416 Stainless Steel
1/8 × 1/8	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	0000000
1/4 × 1/4	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/8 × 3/8	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/2 × 1/2	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/4 × 3/4	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1 × 1	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
NPT Male Inlet × NPT Female Outlet Adapter
416 Stainless Steel
1/8 × 1/8	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/4 × 1/4	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/8 × 3/8	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/2 × 1/2	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/4 × 3/4	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1 × 1	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
NPT Male Inlet × NPT Female Outlet Adapter with Intermittent Swivel
416 Stainless Steel
1/8 × 1/8	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/4 × 1/4	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/8 × 3/8	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/2 × 1/2	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/4 × 3/4	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1 × 1	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
NPT Male Inlet Plug
416 Stainless Steel
1/8	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/4	5,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/8	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1/2	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
3/4	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000
1	4,000	-65° to 212°	Polyurethane Rubber	Air, Argon, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Hydraulic Fluid (Petroleum Based), Natural Gas, Nitrogen, Oxygen, Water	0000000	000000

Gauge Guards

316 Stainless Steel Guard

316 Stainless Steel Guard With Drain Port

Also known as isolators or diaphragm seals, these protect gauges from corrosive process media. Fill guards with ISO Grade 32 hydraulic oil (not included) before use.

316 stainless steel guards provide excellent corrosion and chemical resistance and can handle higher temperatures and pressures than plastic guards.

Guards with drain port allow you to remove process media.

For technical drawings and 3-D models, click on a part number.

Pipe Connections
Inlet	Outlet	Gasket Material	For Use With	Min. Pressure, psi	Max. Pressure	Max. Temp., °F	Ht.		Each
316 Stainless Steel Body
1/4 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 1/2"	0000000	0000000
1/2 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 1/2"	0000000	000000
1/2 NPT Female	1/2 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 1/2"	0000000	000000
316 Stainless Steel Body with 1/4 NPT Female Drain Port
1/4 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000
1/2 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000
1/2 NPT Female	1/2 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydrogen, Liquid Nitrogen, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000

Sanitary Gauge Guards

Keeping corrosive substances from touching pressure gauges used in food-processing and pharmaceutical plants, these guards have a sanitary design. Made of 316 stainless steel, they won’t rust from frequent washdowns with harsh cleaners and sanitizers. They have continuously-welded seams and polished surfaces, so there aren’t any pits for bacteria to grow in. Removing them for cleaning and maintenance is easy thanks to their quick-clamp connection, which is sometimes called a tri-clamp.

Also known as isolators and diaphragm seals, these guards have a 316 stainless steel gasket to shield the pressure gauges from corrosion. Before use, fill the guards with fluid such as glycerin or silicone that’s suitable for food contact.

For technical drawings and 3-D models, click on a part number.

	Outlet Quick-Clamp Tube Connection
Inlet Pipe Connection	For Tube OD	Flange OD	Gasket Material	For Use With	Minimum Pressure, psi	Maximum Pressure	Maximum Temperature	Height	Interior Smoothness, Ra		Each
316 Stainless Steel Body
1/4 NPT Female	1 1/2"	1.984"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 3/8"	32	0000000	0000000
1/4 NPT Female	2"	2.516"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 1/8"	32	0000000	000000
1/2 NPT Female	1 1/2"	1.984"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 3/8"	32	0000000	000000