Flange Gasket Kits | McMaster-Carr

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Aramid-Reinforced Buna-N

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EAR99

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104 Products

Oil-Resistant Aramid-Reinforced Buna-N Pipe Gaskets with Bolt Holes and Fasteners

Each gasket comes with enough bolts and nuts to create a connection between two steel pipe flanges. Commonly called full-face gaskets, they cover the entire face of flat-surface pipe flanges and align with the bolt holes. They’re made from Aramid-reinforced Buna-N and resist oil, water, and aliphatic hydrocarbons such as ethylene.

Plain-Back Gaskets for ANSI Flanges

Image of Product. Front orientation. Pipe Gaskets. Oil-Resistant Aramid-Reinforced Buna-N Pipe Gaskets with Bolt Holes and Fasteners, Plain-Back Gaskets for ANSI Flanges.

Gaskets for ANSI flanges are sized so all gasket specifications meet ANSI standards.

For ANSI Class 150—Gaskets for ANSI Class 150 flanges are compatible with low-pressure pipe flanges.

For ANSI Class 300—Gaskets for ANSI Class 300 flanges are compatible with medium-pressure pipe flanges.

											1/32" Thick		1/16" Thick		1/8" Thick
	For Pipe Size	ID	OD	No. of Bolt Holes	Bolt Screw Size	Bolt Lg.	Max. Pressure, psi	Temp. Range, ° F	Color	Includes		Each		Each		Each
For ANSI Class 150



		1/2	27/32"	3 1/2"	4	1/2"	2 1/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K101	00000	9166K76	000000	9166K102	000000


		3/4	1 1/16"	3 7/8"	4	1/2"	2 1/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K103	0000	9166K77	0000	9166K104	0000
		1	1 5/16"	4 1/4"	4	1/2"	2 1/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K105	0000	9166K78	0000	9166K106	00000
		1 1/4	1 21/32"	4 5/8"	4	1/2"	2 1/2"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	———	0	9166K79	0000	9166K108	00000
		1 1/2	1 29/32"	5"	4	1/2"	2 1/2"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K109	0000	9166K81	0000	9166K111	00000
		2	2 3/8"	6"	4	5/8"	2 1/2"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K112	00000	9166K82	00000	9166K113	00000
		2 1/2	2 7/8"	7"	4	5/8"	2 3/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K114	00000	9166K83	00000	9166K115	00000
		3	3 1/2"	7 1/2"	4	5/8"	2 3/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K116	00000	9166K84	00000	9166K117	00000
		3 1/2	4"	8 1/2"	8	5/8"	3"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K85	00000	9166K119	00000
		4	4 1/2"	9"	8	5/8"	3"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K121	00000	9166K86	00000	9166K122	00000
		5	5 9/16"	10"	8	3/4"	3 1/4"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K123	00000	9166K87	00000	9166K124	00000


		6	6 5/8"	11"	8	3/4"	3 1/4"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K125	00000	9166K88	00000	9166K126	00000
		8	8 5/8"	13 1/2"	8	3/4"	3 1/2"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K127	00000	9166K89	00000	9166K128	00000
		10	10 3/4"	16"	12	7/8"	3 3/4"	725	-40 to 450	Green	12 Grade 2 Steel Bolts and Nuts	———	0	9166K91	000000	9166K131	000000
		12	12 3/4"	19"	12	7/8"	4"	725	-40 to 450	Green	12 Grade 2 Steel Bolts and Nuts	———	0	9166K92	000000	9166K133	000000


		For ANSI Class 300



				1	1 5/16"	4 7/8"	4	5/8"	2 1/2"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	———	0	9166K142	00000	9166K143	00000


				1 1/4	1 21/32"	5 1/4"	4	5/8"	2 3/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	———	0	9166K145	00000	9166K146	00000
				1 1/2	1 29/32"	6 1/8"	4	3/4"	3 1/4"	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	———	0	9166K148	00000	9166K149	00000
				2	2 3/8"	6 1/2"	8	5/8"	3"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K152	00000	9166K153	00000
				2 1/2	2 7/8"	7 1/2"	8	3/4"	3 1/4"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K155	00000	9166K156	00000
				3	3 1/2"	8 1/4"	8	3/4"	3 1/2"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K158	00000	9166K159	00000
				3 1/2	4"	9"	8	3/4"	3 3/4"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K162	00000	9166K163	00000
				4	4 1/2"	10"	8	3/4"	3 3/4"	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	———	0	9166K165	00000	9166K166	00000

Adhesive-Back Gaskets for ANSI Flanges

Image of Product. Front orientation. Pipe Gaskets. Oil-Resistant Aramid-Reinforced Buna-N Pipe Gaskets with Bolt Holes and Fasteners, For ANSI Flanges.

Adhesive-back gaskets stay in place to make installation easier.

Gaskets for ANSI flanges are sized so all gasket specifications meet ANSI standards.

For ANSI Class 150—Gaskets for ANSI Class 150 flanges are compatible with low-pressure pipe flanges.

										Adhesive			1/16" Thick
	For Pipe Size	ID	OD	No. of Bolt Holes	Bolt Screw Size	Bolt Lg.	Max. Pressure, psi	Temp. Range, ° F	Color	Material	Max. Temp., ° F	Includes		Each
For ANSI Class 150



		1 1/4	1 21/32"	4 5/8"	4	1/2"	2 1/2"	725	-40 to 450	Green	Acrylic Plastic	180	4 Grade 2 Steel Bolts and Nuts	9166K181	00000


		1 1/2	1 29/32"	5"	4	1/2"	2 1/2"	725	-40 to 450	Green	Acrylic Plastic	180	4 Grade 2 Steel Bolts and Nuts	9166K182	00000
		2	2 3/8"	6"	4	5/8"	2 1/2"	725	-40 to 450	Green	Acrylic Plastic	180	4 Grade 2 Steel Bolts and Nuts	9166K183	00000
		2 1/2	2 7/8"	7"	4	5/8"	2 3/4"	725	-40 to 450	Green	Acrylic Plastic	180	4 Grade 2 Steel Bolts and Nuts	9166K184	00000
		3	3 1/2"	7 1/2"	4	5/8"	2 3/4"	725	-40 to 450	Green	Acrylic Plastic	180	4 Grade 2 Steel Bolts and Nuts	9166K185	00000
		4	4 1/2"	9"	8	5/8"	3"	725	-40 to 450	Green	Acrylic Plastic	180	8 Grade 2 Steel Bolts and Nuts	9166K187	00000
		6	6 5/8"	11"	8	3/4"	3 1/4"	725	-40 to 450	Green	Acrylic Plastic	180	8 Grade 2 Steel Bolts and Nuts	9166K189	00000

Plain-Back Gaskets for DN Flanges

Gaskets for DN flange sizes are sized to fit pressure class PN16 flanges.

										1/8" Thick
For DN Size	ID, mm	OD, mm	No. of Bolt Holes	Bolt Screw Size	Bolt Lg., mm	Max. Pressure, psi	Temp. Range, ° F	Color	Includes		Each



	15	22	95	4	M12	60	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K208	000000


	25	35	115	4	M12	70	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K209	00000
	50	61	165	4	M16	80	725	-40 to 450	Green	4 Grade 2 Steel Bolts and Nuts	9166K212	00000
	80	90	200	8	M16	90	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K213	00000
	100	115	220	8	M16	90	725	-40 to 450	Green	8 Grade 2 Steel Bolts and Nuts	9166K214	00000

Oil-Resistant Aramid-Reinforced Buna-N Pipe Gaskets with Fasteners

Furnished with enough nuts and bolts to create a connection between two steel pipe flanges. These gaskets, also known as ring gaskets, are for use on raised-surface pipe flanges; they fit the surface inside the bolt holes and do not interfere with the bolt connection. They’re made from Aramid-reinforced Buna-N and resist oil, water, and aliphatic hydrocarbons such as ethylene. Gaskets are compatible with low-pressure pipe flanges; all gasket specifications are sized to meet ANSI standards.

Plain-Back Gaskets for ANSI Flanges

											1/16" Thick
	For Pipe Size	ID	OD	Bolt Screw Size	Bolt Lg.	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Includes		Each
For ANSI Class 150



		1/2	27/32"	1 7/8"	1/2"	2 1/4"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K61	00000


		3/4	1 1/16"	2 1/4"	1/2"	2 1/4"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K62	0000
		1	1 5/16"	2 5/8"	1/2"	2 1/4"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K63	0000
		1 1/4	1 21/32"	3"	1/2"	2 1/2"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K64	0000
		1 1/2	1 29/32"	3 3/8"	1/2"	2 1/2"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K65	0000
		2	2 3/8"	4 1/8"	5/8"	2 1/2"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K66	00000
		2 1/2	2 7/8"	4 7/8"	5/8"	2 3/4"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K67	00000
		3	3 1/2"	5 3/8"	5/8"	2 3/4"	725	-40 to 450	Not Rated	Green	4 Grade 2 Steel Bolts and Nuts	9166K68	00000
		3 1/2	4"	6 3/8"	5/8"	3"	725	-40 to 450	Not Rated	Green	8 Grade 2 Steel Bolts and Nuts	9166K75	00000
		4	4 1/2"	6 7/8"	5/8"	3"	725	-40 to 450	Not Rated	Green	8 Grade 2 Steel Bolts and Nuts	9166K69	00000
		5	5 9/16"	7 3/4"	3/4"	3 1/4"	725	-40 to 450	Not Rated	Green	8 Grade 2 Steel Bolts and Nuts	9166K93	00000


		6	6 5/8"	8 3/4"	3/4"	3 1/4"	725	-40 to 450	Not Rated	Green	8 Grade 2 Steel Bolts and Nuts	9166K71	00000
		8	8 5/8"	11"	3/4"	3 1/2"	725	-40 to 450	Not Rated	Green	8 Grade 2 Steel Bolts and Nuts	9166K72	00000
		10	10 3/4"	13 3/8"	7/8"	3 3/4"	725	-40 to 450	Not Rated	Green	12 Grade 2 Steel Bolts and Nuts	9166K73	00000
		12	12 3/4"	16 1/8"	7/8"	4"	725	-40 to 450	Not Rated	Green	12 Grade 2 Steel Bolts and Nuts	9166K74	000000

Oil-Resistant Compressible Buna-N Pipe Gaskets with Bolt Holes for Dissimilar Metals

The included plastic sleeves and washers provide a layer of protection against dielectric corrosion, which occurs when different metals are joined. Commonly called full-face gaskets, these cover the entire face of flat-surface pipe flanges and align with the bolt holes. They’re made of compressible Buna-N to ensure a tight seal. They resist oil, water, and salts. Gaskets are compatible with low-pressure pipe flanges; all gasket specifications are sized to meet ANSI standards. Each gasket comes with one full-length sleeve for each bolt hole, plus two phenolic and two zinc-plated metal washers for each bolt hole. Bolts are not included.

Plain-Back Gaskets for ANSI Flanges

Image of Product. Front orientation. Pipe Gaskets. Oil-Resistant Compressible Buna-N Pipe Gaskets with Bolt Holes for Dissimilar Metals.

										1/8" Thick
	For Pipe Size	ID	OD	No. of Bolt Holes	Max. Pressure, psi	Max. Temp., ° F	Hardness	Color	Includes		Each
For ANSI Class 150



		1/2	27/32"	3 1/2"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K72	000000


		3/4	1 1/16"	3 7/8"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K73	00000
		1	1 5/16"	4 1/4"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K61	00000
		1 1/2	1 29/32"	5"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K74	00000
		2	2 3/8"	6"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K62	00000
		2 1/2	2 7/8"	7"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K63	00000
		3	3"	7 1/2"	4	455	260	Durometer 60A (Medium Hard)	Black	4 Full-Length PET Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K64	00000
		4	4"	9"	8	455	260	Durometer 60A (Medium Hard)	Black	8 Full-Length PET Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K65	00000
		5	5"	10"	8	455	260	Durometer 60A (Medium Hard)	Black	8 Full-Length PET Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K66	00000
		6	6 5/8"	11"	8	455	260	Durometer 60A (Medium Hard)	Black	8 Full-Length PET Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K67	00000
		8	8 5/8"	13 1/2"	8	455	260	Durometer 60A (Medium Hard)	Black	8 Full-Length PET Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K68	00000


		10	10 3/4"	16"	12	455	260	Durometer 60A (Medium Hard)	Black	12 Full-Length PET Sleeves, 24 Phenolic Washers, 24 Zinc-Plated Metal Washers	9165K69	000000
		12	12 3/4"	19"	12	455	260	Durometer 60A (Medium Hard)	Black	12 Full-Length PET Sleeves, 24 Phenolic Washers, 24 Zinc-Plated Metal Washers	9165K71	000000

Water- and Steam-Resistant EPDM Pipe Gaskets with Bolt Holes for Dissimilar Metals

Furnished with plastic sleeves and washers to provide a layer of protection against dielectric corrosion, which occurs when different metals are joined. These gaskets are commonly called full-face gaskets; they cover the entire face of flat-surface pipe flanges and align with the bolt holes. They’re made of EPDM and resist water, steam, and salt water. They are compatible with low-pressure pipe flanges; all gasket specifications are sized to meet ANSI standards. Each gasket comes with one full-length sleeve for each bolt hole, plus two phenolic and two zinc-plated metal washers for each bolt hole. Bolts are not included.

Plain-Back Gaskets for ANSI Flanges

Image of Product. Front orientation. Pipe Gaskets. Water- and Steam-Resistant EPDM Pipe Gaskets with Bolt Holes for Dissimilar Metals.

										1/8" Thick
	For Pipe Size	ID	OD	No. of Bolt Holes	Max. Pressure, psi	Max. Temp., ° F	Hardness	Color	Includes		Each
For ANSI Class 150



		1	1 5/16"	4 1/4"	4	285	250	Durometer 70A (Hard)	Off-White	4 Full-Length Phenolic Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K75	000000


		1 1/2	1 29/32"	5"	4	285	250	Durometer 70A (Hard)	Off-White	4 Full-Length Phenolic Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K76	00000
		2	2 3/8"	6"	4	285	250	Durometer 70A (Hard)	Off-White	4 Full-Length Phenolic Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K77	00000
		2 1/2	2 7/8"	7"	4	285	250	Durometer 70A (Hard)	Off-White	4 Full-Length Phenolic Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K78	00000
		3	3 1/2"	7 1/2"	4	285	250	Durometer 70A (Hard)	Off-White	4 Full-Length Phenolic Sleeves, 8 Phenolic Washers, 8 Zinc-Plated Metal Washers	9165K79	00000
		4	4 1/2"	9"	8	285	250	Durometer 70A (Hard)	Off-White	8 Full-Length Phenolic Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K81	00000
		6	6 5/8"	11"	8	285	250	Durometer 70A (Hard)	Off-White	8 Full-Length Phenolic Sleeves, 16 Phenolic Washers, 16 Zinc-Plated Metal Washers	9165K82	000000