ANPT Nipples | McMaster-Carr

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71 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.

For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
Temperature Range: -320° to 1200° F
Tubing: Use with seamless 304 or 316 stainless steel
Specifications Met: See Table

The threads on the tube end of these fittings are Class 3A or 3B and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

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

Straight Adapters, Tube × Male Threaded Pipe

304 Stainless Steel
For Tube OD	Pipe Size	Max. Pressure	Specifications Met		Each
ANPT Threads
1/8"	1/8	3,000 psi @ 72° F	AN816-2J, ASTM A380, SAE AS4841	0000000	000000
1/4"	1/8	3,000 psi @ 72° F	AN816-4J, ASTM A380, SAE AS4841	00000000	00000
1/4"	1/4	3,000 psi @ 72° F	AN816-4-4J, ASTM A380, SAE AS4841	0000000	00000
1/4"	3/8	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
1/4"	1/2	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
5/16"	1/4	3,000 psi @ 72° F	AN816-5-4J, ASTM A380, SAE AS4841	00000000	00000
3/8"	1/4	3,000 psi @ 72° F	AN816-6J, ASTM A380, SAE AS4841	00000000	00000
3/8"	3/8	3,000 psi @ 72° F	AN816-6-6J, ASTM A380, SAE AS4841	0000000	00000
1/2"	1/4	3,000 psi @ 72° F	AN816-8-4J, ASTM A380, SAE AS4841	00000000	00000
1/2"	3/8	3,000 psi @ 72° F	AN816-8J, ASTM A380, SAE AS4841	00000000	00000
1/2"	1/2	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	0000000	00000
1/2"	3/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
5/8"	1/2	3,000 psi @ 72° F	AN816-10-8J, ASTM A380, SAE AS4841	00000000	00000
3/4"	1/2	3,000 psi @ 72° F	AN816-12-8J, ASTM A380, SAE AS4841	00000000	00000
3/4"	3/4	3,000 psi @ 72° F	AN816-12J, ASTM A380, SAE AS4841	0000000	00000
1"	1	3,000 psi @ 72° F	AN816-16J, ASTM A380, SAE AS4841	00000000	00000
316 Stainless Steel
ANPT Threads
1/8"	1/8	3,000 psi @ 72° F	AN816-2K, ASTM A380, SAE AS4841	00000000	00000
1/4"	1/8	3,000 psi @ 72° F	AN816-4K, ASTM A380, SAE AS4841	00000000	00000
1/4"	1/4	3,000 psi @ 72° F	AN816-4-4K, ASTM A380, SAE AS4841	00000000	00000
1/4"	3/8	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
1/4"	1/2	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
3/8"	1/4	3,000 psi @ 72° F	AN816-6K, ASTM A380, SAE AS4841	00000000	00000
3/8"	3/8	3,000 psi @ 72° F	AN816-6-6K, ASTM A380, SAE AS4841	00000000	00000
1/2"	1/4	3,000 psi @ 72° F	AN816-8-4K, ASTM A380, SAE AS4841	00000000	00000
1/2"	3/8	3,000 psi @ 72° F	AN816-8K, ASTM A380, SAE AS4841	00000000	00000
1/2"	1/2	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
1/2"	3/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	00000
5/8"	1/2	3,000 psi @ 72° F	AN816-10-8K, ASTM A380, SAE AS4841	00000000	00000
3/4"	1/2	3,000 psi @ 72° F	AN816-12-8K, ASTM A380, SAE AS4841	00000000	00000
3/4"	3/4	3,000 psi @ 72° F	AN816-12K, ASTM A380, SAE AS4841	00000000	00000
1"	1	3,000 psi @ 72° F	AN816-16K, ASTM A380, SAE AS4841	00000000	00000

Straight Adapters, Tube × Female Threaded Pipe

316 Stainless Steel
For Tube OD	Pipe Size	Max. Pressure	Specifications Met		Each
ANPT Threads
1/4"	1/8	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-4S	00000000	000000
1/4"	1/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-4-4S	00000000	00000
3/8"	1/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-6S	00000000	00000
3/8"	3/8	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-6-6S	00000000	000000
1/2"	3/8	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-8S	00000000	00000
1/2"	1/2	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-8-8S	00000000	00000
3/4"	3/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-12S	00000000	00000
1"	1	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1, MS51503B-16S	00000000	000000

Nuts

304 Stainless Steel
For Tube OD	Max. Pressure	Specifications Met		Each
1/4"	3,000 psi @ 72° F	AN818-4J, ASTM A380, SAE AS4841	0000000	00000
5/16"	3,000 psi @ 72° F	AN818-5J, ASTM A380, SAE AS4841	00000000	00000
3/8"	3,000 psi @ 72° F	AN818-6J, ASTM A380, SAE AS4841	0000000	0000
1/2"	3,000 psi @ 72° F	AN818-8J, ASTM A380, SAE AS4841	0000000	00000
5/8"	3,000 psi @ 72° F	AN818-10J, ASTM A380, SAE AS4841	00000000	00000
3/4"	3,000 psi @ 72° F	AN818-12J, ASTM A380, SAE AS4841	0000000	00000
1"	3,000 psi @ 72° F	AN818-16J, ASTM A380, SAE AS4841	00000000	00000
316 Stainless Steel
1/8"	3,000 psi @ 72° F	AN818-2K, ASTM A380, SAE AS4841	00000000	00000
1/4"	3,000 psi @ 72° F	AN818-4K, ASTM A380, SAE AS4841	00000000	00000
3/8"	3,000 psi @ 72° F	AN818-6K, ASTM A380, SAE AS4841	00000000	00000
1/2"	3,000 psi @ 72° F	AN818-8K, ASTM A380, SAE AS4841	00000000	00000
5/8"	3,000 psi @ 72° F	AN818-10K, ASTM A380, SAE AS4841	00000000	00000
3/4"	3,000 psi @ 72° F	AN818-12K, ASTM A380, SAE AS4841	00000000	00000
1"	3,000 psi @ 72° F	AN818-16K, ASTM A380, SAE AS4841	00000000	00000

Sleeves

304 Stainless Steel
For Tube OD	Max. Pressure	Specifications Met		Each
1/4"	3,000 psi @ 72° F	AN819-4J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	0000000	00000
5/16"	3,000 psi @ 72° F	AN819-5J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	0000
3/8"	3,000 psi @ 72° F	AN819-6J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	0000000	0000
1/2"	3,000 psi @ 72° F	AN819-8J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	0000000	0000
5/8"	3,000 psi @ 72° F	AN819-10J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	0000
3/4"	3,000 psi @ 72° F	AN819-12J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	0000000	00000
1"	3,000 psi @ 72° F	AN819-16J, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000
316 Stainless Steel
1/8"	3,000 psi @ 72° F	AN819-2K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	0000
1/4"	3,000 psi @ 72° F	AN819-4K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	0000
3/8"	3,000 psi @ 72° F	AN819-6K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000
1/2"	3,000 psi @ 72° F	AN819-8K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000
5/8"	3,000 psi @ 72° F	AN819-10K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000
3/4"	3,000 psi @ 72° F	AN819-12K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000
1"	3,000 psi @ 72° F	AN819-16K, ASTM A380, MS20819, SAE AS4841, SAE AS5176	00000000	00000

Vibration-Resistant Precision AN 37° Flared Fittings for Stainless Steel Tubing

For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
Temperature Range: -320° to 500° F
Tubing: Use with seamless 304 or 316 stainless steel
Specifications Met: See Table

A PTFE seal on the tube end of these fittings allows for an extra-strong connection in high-vibration applications. The threads on the tube end are Class 3A and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are 316 stainless steel for excellent corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

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

Straight Adapters, Tube × Male Threaded Pipe

PTFE Seal

ANPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Specifications Met		Each
1/4"	1/4	316 Stainless Steel	3,000 psi @ 72° F	ASTM A380, SAE AS9104/1, AN816-4-4K, SAE AS9100D	00000000	000000
3/8"	3/8	316 Stainless Steel	3,000 psi @ 72° F	ASTM A380, SAE AS9104/1, AN816-6-6K, SAE AS9100D	00000000	00000
1/2"	1/2	316 Stainless Steel	3,000 psi @ 72° F	ASTM A380, SAE AS9104/1, SAE AS9100D	00000000	00000
3/4"	3/4	316 Stainless Steel	3,000 psi @ 72° F	ASTM A380, SAE AS9104/1, AN816-12K, SAE AS9100D	00000000	00000

Nuts

For Tube OD	Nut Material	Max. Pressure	Specifications Met		Each
1/4"	316 Stainless Steel	3,000 psi @ 72° F	AN818-4K, ASTM A380, SAE AS4841	00000000	000000
3/8"	316 Stainless Steel	3,000 psi @ 72° F	AN818-6K, ASTM A380, SAE AS4841	00000000	00000
1/2"	316 Stainless Steel	3,000 psi @ 72° F	AN818-8K, ASTM A380, SAE AS4841	00000000	00000
3/4"	316 Stainless Steel	3,000 psi @ 72° F	AN818-12K, ASTM A380, SAE AS4841	00000000	00000

Sleeves

For Tube OD	Sleeve Material	Max. Pressure	Specifications Met		Each
1/4"	316 Stainless Steel	3,000 psi @ 72° F	AN819-4K, ASTM A380, MS20819, SAE AS4841	00000000	00000
3/8"	316 Stainless Steel	3,000 psi @ 72° F	AN819-6K, ASTM A380, MS20819, SAE AS4841	00000000	00000
1/2"	316 Stainless Steel	3,000 psi @ 72° F	AN819-8K, ASTM A380, MS20819, SAE AS4841	00000000	00000
3/4"	316 Stainless Steel	3,000 psi @ 72° F	AN819-12K, ASTM A380, MS20819, SAE AS4841	00000000	00000