T-Seals | McMaster-Carr

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53 Products

Piston Seals for O-Ring Grooves


	Profile

Avoid common O-ring failure in dynamic applications—the square base of these seals prevents twisting, while backup rings protect against extrusion.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

		For Groove
	For Bore Dia.	Dia.	Wd.	O-Ring Dash No. Equiv.	Max. Speed, ft/sec	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color		Each
Buna-N with Nylon Backup Ring



		5/8"	0.381"	0.187"	204	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N12	00000


		3/4"	0.506"	0.187"	206	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N13	0000
		7/8"	0.631"	0.187"	208	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N14	0000
		1"	0.757"	0.187"	210	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N15	0000
		1 1/8"	0.882"	0.187"	212	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N16	0000
		1 1/4"	1.007"	0.187"	214	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N17	0000
		1 1/2"	1.257"	0.187"	218	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N19	0000
		1 3/4"	1.507"	0.187"	222	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N22	0000
		2"	1.628"	0.282"	326	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N24	00000
		2 1/4"	1.878"	0.282"	328	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N26	00000
		2 1/2"	2.128"	0.282"	330	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N28	00000


		3"	2.628"	0.282"	334	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N31	00000
		3 1/2"	3.129"	0.282"	338	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N33	00000
		4"	3.629"	0.282"	342	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	1386N34	00000

Channel-Mount T-Seals


Style A	Style B	Style C

Push these T-seals into grooves and channels to block out moisture, dust, and debris.

Style A

EPDM—They’re made of EPDM, so they resist water, sunlight, and ozone.

			Stem										10 ft. Long		25 ft. Long
	Wd.	Ht.	Lg.	Thk.	Grip Ht.	Grip Material	Flexibility	Hardness	Hardness Rating	Temp. Range, ° F	For Use Outdoors	Color		Each		Each
EPDM—Push In



		19/64"	1/2"	23/64"	13/64"	9/64"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N411	000000	6389N412	000000


		5/16"	1/2"	7/16"	1/16"	1/16"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N111	00000	6389N112	00000
		5/16"	1 3/8"	1 5/16"	1/16"	1/16"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N211	00000	6389N212	00000
		1/2"	5/16"	5/32"	1/16"	5/32"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N311	00000	6389N312	00000
		5/8"	1/2"	1/4"	1/4"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N511	00000	6389N512	000000
		1 3/4"	1/2"	1/4"	1"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6389N611	00000	———	0

Style B

EPDM—They’re made of EPDM, so they resist water, sunlight, and ozone.

			Stem										10 ft. Long		25 ft. Long
	Wd.	Ht.	Lg.	Thk.	Grip Ht.	Grip Material	Flexibility	Hardness	Hardness Rating	Temp. Range, ° F	For Use Outdoors	Color		Each		Each
EPDM—Push In



		1/2"	1/2"	1/4"	1/8"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6390N211	000000	6390N212	000000


		1/2"	1/2"	1/4"	3/16"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6390N411	00000	6390N412	000000
		3/4"	7/8"	5/8"	1/8"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6390N311	00000	6390N312	00000

Style C

EPDM—They’re made of EPDM, so they resist water, sunlight, and ozone.

			Stem										10 ft. Long		25 ft. Long
	Wd.	Ht.	Lg.	Thk.	Grip Ht.	Grip Material	Flexibility	Hardness	Hardness Rating	Temp. Range, ° F	For Use Outdoors	Color		Each		Each
EPDM—Push In



		19/64"	5/32"	1/16"	3/32"	3/32"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6391N111	000000	6391N112	000000


		7/16"	1/4"	1/8"	1/8"	1/8"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6391N211	00000	6391N212	00000
		3/4"	3/8"	1/4"	3/16"	1/8"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6391N311	00000	6391N312	00000
		2"	9/16"	5/16"	5/16"	1/4"	EPDM	Flexible	Durometer 70A	Hard	-30 to 200	Yes	Black	6391N411	00000	6391N412	00000

Rod Seals for O-Ring Grooves


Profile

Avoid common O-ring failure in dynamic applications—the square base of these seals prevents twisting, while backup rings protect against extrusion.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

		For Groove
	For Rod Dia.	Dia.	Wd.	O-Ring Dash No. Equiv.	Max. Speed, ft/sec	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Backup Ring Color		Each
Buna-N with Nylon Backup Ring



		1/2"	0.742"	0.187"	206	1.6	5,000	-40 to 225	Durometer 75A (Hard)	Black	Gray	1626N11	00000


		5/8"	0.867"	0.187"	208	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N12	0000
		3/4"	0.991"	0.187"	210	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N13	0000
		1 1/8"	1.366"	0.187"	216	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N16	0000
		1 1/2"	1.870"	0.282"	325	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N18	0000
		2"	2.370"	0.282"	329	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N21	00000
		2 1/4"	2.612"	0.282"	331	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N22	00000
		2 1/2"	2.870"	0.282"	333	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N23	00000
		3"	3.369"	0.282"	337	1.6	5,000	-40 to 225	Durometer 70A (Hard)	Black	Gray	1626N25	00000

High-Pressure Piston Seals


	Profile

Rated for pressure up to 10,000 psi, these seals withstand the highest pressure of our piston seals. They have two high-strength backup rings that protect against extrusion.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

		For Groove								O-Ring
	For Bore Dia.	Dia.	Wd.	O-Ring Dash No. Equiv.	Max. Speed, ft/sec	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Hardness	Color		Each
Glass-Filled PTFE with Nylon Backup Ring and Buna-N O-Ring



		2"	1.625"	0.424"	Not Rated	5	10,000	-30 to 230	Durometer 60D (Extra Hard)	Gray	Durometer 70A (Hard)	Black	1639N12	000000


		2 1/2"	2.125"	0.424"	Not Rated	5	10,000	-30 to 230	Durometer 60D (Extra Hard)	Gray	Durometer 70A (Hard)	Black	1639N13	00000
		3"	2.520"	0.579"	Not Rated	5	10,000	-30 to 230	Durometer 60D (Extra Hard)	Gray	Durometer 70A (Hard)	Black	1639N14	00000
		3 1/2"	3.020"	0.579"	Not Rated	5	10,000	-30 to 230	Durometer 60D (Extra Hard)	Gray	Durometer 70A (Hard)	Black	1639N15	00000
		4"	3.520"	0.579"	Not Rated	5	10,000	-30 to 230	Durometer 60D (Extra Hard)	Gray	Durometer 70A (Hard)	Black	1639N16	00000