Flared Tube Fitting Gaskets

Filter by

Material

Aluminum

Copper

Stainless Steel

Dash Size

Fitting Connection

Tube OD

Thickness

Maximum Temperature

Color

Thread Size

Thread Type

Minimum Temperature

Maximum Pressure

Export Control Classification Number (ECCN)

2B999

EAR99

REACH

Compliant

DFARS Specialty Metals

Exempt

RoHS

Compliant

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

Yes

Forward

How can we improve?

94 Products

Gaskets for 37° Flared Tube Fittings


Gasket	Threadlocker-Coated Gasket

Prevent leaks from temperature fluctuations and vibration that can loosen 37° flared tube fittings. In general, you should match your gasket material to your fitting material. But, if you have a brass fitting, you can use a copper gasket.

Gaskets without a coating are best for fittings that are exposed to harsh chemicals, such as antifreeze, which can dissolve the threadlocker coating.

Threadlocker-coated gaskets offer a more secure hold than uncoated gaskets, so they’re best for areas with high vibration.

			Thread				Temperature, ° F
	For Tube OD	Dash Size	Size	Type	Thk.	Max. Pressure, psi	Min.	Max.		Each
304 Stainless Steel



		1/4"	04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	Not Rated	2,500	4558N201	00000


		3/8"	06	9/16"-18	UN/UNF (JIC)	0.205"	20,000	Not Rated	2,500	4558N202	0000
		1/2"	08	3/4"-16	UN/UNF (JIC)	0.26"	20,000	Not Rated	2,500	4558N203	0000
		5/8"	10	7/8"-14	UN/UNF (JIC)	0.268"	20,000	Not Rated	2,500	4558N204	0000
		3/4"	12	1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	Not Rated	2,500	4558N205	0000
		1"	16	1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	Not Rated	2,500	4558N206	0000
		1 1/4"	20	1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	Not Rated	2,500	4558N207	00000
		1 1/2"	24	1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	Not Rated	2,500	4558N208	00000
		2"	32	2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	Not Rated	2,500	4558N209	00000


		Threadlocker-Coated 304 Stainless Steel—Orange



				1/4"	04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	-40	300	4558N101	0000


				3/8"	06	9/16"-18	UN/UNF (JIC)	0.205"	20,000	-40	300	4558N102	0000
				1/2"	08	3/4"-16	UN/UNF (JIC)	0.26"	20,000	-40	300	4558N103	0000
				5/8"	10	7/8"-14	UN/UNF (JIC)	0.268"	20,000	-40	300	4558N104	0000
				3/4"	12	1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	-40	300	4558N105	0000
				1"	16	1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	-40	300	4558N106	0000
				1 1/4"	20	1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	-40	300	4558N107	00000
				1 1/2"	24	1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	-40	300	4558N108	00000
				2"	32	2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	-40	300	4558N109	00000


				316 Stainless Steel



						3/16"	03	3/8"-16	UN/UNF (JIC)	0.145"	20,000	Not Rated	2,500	4558N181	0000


						1/4"	04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	Not Rated	2,500	4558N182	0000
						5/16"	05	1/2"-20	UN/UNF (JIC)	0.188"	20,000	Not Rated	2,500	4558N183	0000
						3/8"	06	9/16"-18	UN/UNF (JIC)	0.205"	20,000	Not Rated	2,500	4558N184	0000
						1/2"	08	3/4"-16	UN/UNF (JIC)	0.26"	20,000	Not Rated	2,500	4558N185	0000
						5/8"	10	7/8"-14	UN/UNF (JIC)	0.268"	20,000	Not Rated	2,500	4558N186	0000
						3/4"	12	1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	Not Rated	2,500	4558N187	0000
						7/8"	14	1 3/16"-12	UN/UNF (JIC)	0.28"	20,000	Not Rated	2,500	4558N188	00000
						1"	16	1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	Not Rated	2,500	4558N189	00000
						1 1/4"	20	1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	Not Rated	2,500	4558N191	00000
						1 1/2"	24	1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	Not Rated	2,500	4558N192	00000


						2"	32	2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	Not Rated	2,500	4558N193	00000


						Threadlocker-Coated 316 Stainless Steel—Black



								3/16"	03	3/8"-16	UN/UNF (JIC)	0.145"	20,000	-40	1,200	4558N141	0000


								1/4"	04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	-40	1,200	4558N142	0000
								5/16"	05	1/2"-20	UN/UNF (JIC)	0.188"	20,000	-40	1,200	4558N143	0000
3/8"								06	9/16"-18	UN/UNF (JIC)	0.205"	20,000	-40	1,200	4558N144	0000
1/2"	08							3/4"-16	UN/UNF (JIC)	0.26"	20,000	-40	1,200	4558N145	0000
5/8"	10							7/8"-14	UN/UNF (JIC)	0.268"	20,000	-40	1,200	4558N146	0000
3/4"	12							1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	-40	1,200	4558N147	0000
7/8"	14							1 3/16"-12	UN/UNF (JIC)	0.28"	20,000	-40	1,200	4558N148	00000
1"	16							1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	-40	1,200	4558N149	00000
1 1/4"	20							1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	-40	1,200	4558N151	0000
1 1/2"	24							1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	-40	1,200	4558N152	00000


2"	32							2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	-40	1,200	4558N153	00000


Threadlocker-Coated 316 Stainless Steel—Green



								3/16"	03	3/8"-16	UN/UNF (JIC)	0.145"	20,000	-40	300	4558N121	0000


		1/4"	04					7/16"-20	UN/UNF (JIC)	0.183"	20,000	-40	300	4558N122	0000
		5/16"	05					1/2"-20	UN/UNF (JIC)	0.188"	20,000	-40	300	4558N123	0000
		3/8"	06					9/16"-18	UN/UNF (JIC)	0.205"	20,000	-40	300	4558N124	0000
		1/2"	08					3/4"-16	UN/UNF (JIC)	0.26"	20,000	-40	300	4558N125	0000
		5/8"	10					7/8"-14	UN/UNF (JIC)	0.268"	20,000	-40	300	4558N126	0000
		3/4"	12					1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	-40	300	4558N127	0000
		7/8"	14					1 3/16"-12	UN/UNF (JIC)	0.28"	20,000	-40	300	4558N128	00000
		1"	16					1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	-40	300	4558N129	00000
		1 1/4"	20					1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	-40	300	4558N131	00000
		1 1/2"	24					1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	-40	300	4558N132	00000


		2"	32					2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	-40	300	4558N133	00000


		Aluminum



				1/4"	04			7/16"-20	UN/UNF (JIC)	0.183"	3,000	Not Rated	1,200	4558N241	0000


				3/8"	06			9/16"-18	UN/UNF (JIC)	0.205"	3,000	Not Rated	1,200	4558N242	0000
				1/2"	08			3/4"-16	UN/UNF (JIC)	0.26"	3,000	Not Rated	1,200	4558N243	0000
				5/8"	10			7/8"-14	UN/UNF (JIC)	0.268"	3,000	Not Rated	1,200	4558N244	0000
				3/4"	12			1 1/16"-12	UN/UNF (JIC)	0.274"	3,000	Not Rated	1,200	4558N245	0000
				1"	16			1 5/16"-12	UN/UNF (JIC)	0.285"	3,000	Not Rated	1,200	4558N246	0000


				Copper



								3/16"	03	3/8"-16	UN/UNF (JIC)	0.145"	20,000	-420	800	4558N221	0000


								1/4"	04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	-420	800	4558N222	0000
								5/16"	05	1/2"-20	UN/UNF (JIC)	0.188"	20,000	-420	800	4558N223	0000
								3/8"	06	9/16"-18	UN/UNF (JIC)	0.205"	20,000	-420	800	4558N224	0000
						1/2"		08	3/4"-16	UN/UNF (JIC)	0.26"	20,000	-420	800	4558N225	0000
						5/8"	10	7/8"-14	UN/UNF (JIC)	0.268"	20,000	-420	800	4558N226	0000
						3/4"	12	1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	-420	800	4558N227	0000
						7/8"	14	1 3/16"-12	UN/UNF (JIC)	0.28"	20,000	-420	800	4558N228	0000
						1"	16	1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	-420	800	4558N229	00000
						1 1/4"	20	1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	-420	800	4558N231	00000
						1 1/2"	24	1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	-420	800	4558N232	00000


						2"	32	2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	-420	800	4558N233	00000


						Threadlocker-Coated Copper—Purple



								3/16"	03	3/8"-16	UN/UNF (JIC)	0.145"	20,000	-40	300	4558N161	0000


1/4"								04	7/16"-20	UN/UNF (JIC)	0.183"	20,000	-40	300	4558N162	0000
5/16"	05							1/2"-20	UN/UNF (JIC)	0.188"	20,000	-40	300	4558N163	0000
3/8"	06							9/16"-18	UN/UNF (JIC)	0.205"	20,000	-40	300	4558N164	0000
1/2"	08							3/4"-16	UN/UNF (JIC)	0.26"	20,000	-40	300	4558N165	0000
5/8"	10							7/8"-14	UN/UNF (JIC)	0.268"	20,000	-40	300	4558N166	0000
3/4"	12							1 1/16"-12	UN/UNF (JIC)	0.274"	20,000	-40	300	4558N167	0000
7/8"	14							1 3/16"-12	UN/UNF (JIC)	0.28"	20,000	-40	300	4558N168	00000
1"	16							1 5/16"-12	UN/UNF (JIC)	0.285"	20,000	-40	300	4558N169	00000
1 1/4"	20							1 5/8"-12	UN/UNF (JIC)	0.335"	20,000	-40	300	4558N171	00000
1 1/2"	24							1 7/8"-16	UN/UNF (JIC)	0.351"	20,000	-40	300	4558N172	00000


2"	32							2 1/2"-12	UN/UNF (JIC)	0.43"	20,000	-40	300	4558N173	00000

Gaskets for 45° Flared Tube Fittings

Stop leaks from variations in temperature and vibration that can loosen 45° flared tube fittings. Made of copper, these gaskets are for use with brass fittings.

Copper—Gaskets without a coating are best for fittings that are exposed to harsh chemicals, such as antifreeze, which can dissolve the threadlocker coating.

Threadlocker-Coated Copper—Threadlocker-coated gaskets offer a more secure hold than uncoated gaskets, so they’re best for areas with high vibration.

			Thread
	For Tube OD	Dash Size	Size	Type	Thk.	Max. Pressure, psi	Temp. Range, ° F	Color		Each
Copper



		1/4"	04	7/16"-20	UN/UNF (SAE 45°)	0.16"	20,000	-420 to 800	—	4493N16	00000


		3/8"	06	9/16"-18	UN/UNF (SAE 45°)	0.22"	20,000	-420 to 800	—	4493N17	0000
		1/2"	08	3/4"-16	UN/UNF (SAE 45°)	0.235"	20,000	-420 to 800	—	4493N18	0000
		5/8"	10	7/8"-14	UN/UNF (SAE 45°)	0.255"	20,000	-420 to 800	—	4493N19	0000
		3/4"	12	1 1/16"-12	UN/UNF (SAE 45°)	0.265"	20,000	-420 to 800	—	4493N21	0000


		Threadlocker-Coated Copper



				1/4"	04	7/16"-20	UN/UNF (SAE 45°)	0.165"	20,000	-40 to 300	Purple	4493N11	0000


				3/8"	06	9/16"-18	UN/UNF (SAE 45°)	0.225"	20,000	-40 to 300	Purple	4493N12	0000
				1/2"	08	3/4"-16	UN/UNF (SAE 45°)	0.24"	20,000	-40 to 300	Purple	4493N13	0000
				5/8"	10	7/8"-14	UN/UNF (SAE 45°)	0.26"	20,000	-40 to 300	Purple	4493N14	0000
				3/4"	12	1 1/16"-12	UN/UNF (SAE 45°)	0.27"	20,000	-40 to 300	Purple	4493N15	0000