Chemical-Resistant Caps | McMaster-Carr

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137 Products

Round Caps

Cover pipe and rods to keep dust and coatings out of threads. These caps also prevent dents and nicks during shipping and storage. Push them onto just about any round object.

Rubber

Chemical-Resistant

EPDM

Chemical-Resistant EPDM—These caps won't swell or crack when masking parts during plating, anodizing, and other chemical finishing. They're flexible and conform for a tight fit.

	For OD	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Chemical-Resistant EPDM



		0.02"	1/2"	Flexible	200	Black	100	6448K117	000000
		0.034"	1/2"	Flexible	200	Black	100	6448K118	00000
		3/64"	3/4"	Flexible	200	Black	100	6448K19	00000
		1/16"	3/4"	Flexible	200	Black	100	6448K119	00000
		5/64"	1"	Flexible	200	Black	50	6448K51	0000
		3/32"	3/4"	Flexible	200	Black	50	6448K52	0000
		0.1"	1/2"	Flexible	200	Black	50	6448K21	0000
		7/64"	3/4"	Flexible	200	Black	50	6448K22	0000
		1/8"	1/2"	Flexible	200	Black	50	6448K138	0000
		1/8"	1"	Flexible	200	Black	50	6448K72	0000


		9/64"	1/2"	Flexible	200	Black	50	6448K159	0000
		9/64"	1"	Flexible	200	Black	50	6448K73	0000
		5/32"	1"	Flexible	200	Black	50	6448K74	0000
		11/64"	1/2"	Flexible	200	Black	50	6448K205	0000
		11/64"	1"	Flexible	200	Black	50	6448K75	00000
		3/16"	1/2"	Flexible	200	Black	50	6448K208	0000
		3/16"	1"	Flexible	200	Black	50	6448K76	00000
		7/32"	1"	Flexible	200	Black	50	6448K57	0000
		0.223"	1"	Flexible	200	Black	50	6448K23	0000
		15/64"	1"	Flexible	200	Black	50	6448K24	00000


		15/64"	1 1/2"	Flexible	200	Black	50	6448K287	00000
		1/4"	1"	Flexible	200	Black	50	6448K77	00000
		9/32"	1"	Flexible	200	Black	50	6448K97	0000
		19/64"	1"	Flexible	200	Black	50	6448K343	00000
		19/64"	1 1/2"	Flexible	200	Black	50	6448K517	00000
		5/16"	1"	Flexible	200	Black	50	6448K78	00000
		11/32"	1"	Flexible	200	Black	50	6448K98	00000
		0.355"	1 1/2"	Flexible	200	Black	50	6448K25	00000
		3/8"	1"	Flexible	200	Black	25	6448K79	0000
		3/8"	1 1/2"	Flexible	200	Black	25	6448K656	00000


		13/32"	1"	Flexible	200	Black	25	6448K26	0000
		7/16"	1"	Flexible	200	Black	25	6448K81	0000
		0.456"	1 1/2"	Flexible	200	Black	25	6448K27	0000
		15/32"	1"	Flexible	200	Black	10	6448K28	0000
		1/2"	1 1/2"	Flexible	200	Black	25	6448K82	00000
		0.535"	1 1/2"	Flexible	200	Black	50	6448K29	00000
		9/16"	1 1/2"	Flexible	200	Black	25	6448K83	00000
		5/8"	1 1/2"	Flexible	200	Black	50	6448K31	00000
		11/16"	1 1/2"	Flexible	200	Black	10	6448K32	0000
		3/4"	1 1/2"	Flexible	200	Black	10	6448K84	0000


		13/16"	1 1/2"	Flexible	200	Black	25	6448K33	00000
		7/8"	1 1/2"	Flexible	200	Black	10	6448K85	0000
		15/16"	1 1/2"	Flexible	200	Black	10	6448K34	0000
		1"	1 1/2"	Flexible	200	Black	10	6448K86	0000
		1 1/16"	1 1/2"	Flexible	200	Black	10	6448K35	0000
		1 1/8"	1 1/2"	Flexible	200	Black	5	6448K36	0000
		1 3/16"	1 1/2"	Flexible	200	Black	5	6448K37	0000
		1 1/4"	1 1/2"	Flexible	200	Black	5	6448K38	0000
		1 3/8"	1 1/2"	Flexible	200	Black	5	6448K99	0000
		1 1/2"	1 1/2"	Flexible	200	Black	5	6448K39	0000


		1 5/8"	1 1/2"	Flexible	200	Black	5	6448K15	0000
1 3/4"		2"	Flexible	200	Black	5	6448K911	0000
1 7/8"	2"	Flexible	200	Black	5	6448K921	00000
2"	2"	Flexible	200	Black	5	6448K112	00000
2 1/2"	1 1/2"	Flexible	200	Black	5	6448K113	00000
2 3/4"	1 1/2"	Flexible	200	Black	5	6448K114	00000
3 1/2"	1 1/2"	Flexible	200	Black	1	6448K115	0000
4"	1 3/4"	Flexible	200	Black	1	6448K116	0000

Tapered Plugs

Chemical-Resistant

EPDM, 0 Holes

Don't worry about having the exact size you need on hand—these plugs are shaped to fit a range of diameters. Push in until they're snug to mask holes during coating and finishing.

Chemical-Resistant EPDM—These plugs won't degrade from exposure to cleaners, acids, and solvents.

					0 Holes
	For ID	Ht.	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Chemical-Resistant EPDM



		3/64" to 1/16"	5/8"	300	Black	100	6448K101	000000
		1/16" to 5/64"	5/8"	300	Black	100	6448K71	00000
		5/64" to 1/8"	3/4"	300	Black	100	6448K87	00000
		9/64" to 3/16"	3/4"	300	Black	50	6448K88	00000
		13/64" to 9/32"	5/8"	300	Black	50	6448K89	00000
		17/64" to 5/16"	3/4"	300	Black	25	6448K91	00000
		17/64" to 3/8"	1"	300	Black	50	6448K102	00000
		21/64" to 7/16"	7/8"	300	Black	25	6448K92	0000
		33/64" to 19/32"	1"	300	Black	10	6448K93	0000
		37/64" to 11/16"	1"	300	Black	10	6448K94	0000


		41/64" to 23/32"	1"	300	Black	10	6448K95	00000
		47/64" to 7/8"	1"	300	Black	10	6448K96	00000
		51/64" to 15/16"	1"	300	Black	10	6448K103	00000
		1 1/16" to 1 3/16"	1"	300	Black	10	6448K104	00000
		1 7/32" to 1 3/8"	1"	300	Black	10	6448K105	00000
		1 21/64" to 1 35/64"	1"	300	Black	10	6448K106	00000
		1 1/2" to 1 11/16"	1"	300	Black	10	6448K107	00000
		1 29/32" to 2 9/64"	1"	300	Black	5	6448K108	00000
		2" to 2 13/32"	1"	300	Black	5	6448K109	00000
		2 5/32" to 2 7/16"	1"	300	Black	5	6448K121	00000


		2 15/32" to 2 57/64"	1 1/2"	300	Black	1	6448K122	00000
		3 3/64" to 3 7/16"	1 1/2"	300	Black	1	6448K123	00000
		3 19/64" to 3 15/16"	1 1/2"	300	Black	1	6448K124	00000
		3 35/64" to 4 15/16"	2"	300	Black	1	6448K125	00000
		4 3/64" to 4 15/16"	2"	300	Black	1	6448K126	00000
		4 19/64" to 5 9/64"	2"	300	Black	1	6448K127	00000
		4 51/64" to 5 47/64"	2 1/4"	300	Black	1	6448K128	00000
		5 3/64" to 6 1/16"	2 1/2"	300	Black	1	6448K129	00000

Pull-Through Plugs

Fill the entire length of through holes instead of plugging each end. Grip the small end of these plugs and pull through to mask holes during finishing. They’re also good for plugging multiple aligned holes at once.

Chemical-Resistant EPDM—These plugs won't swell or crack when masking parts during plating, anodizing, and other chemical finishing.

High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.

	For ID	Ht.	Tab Ht.	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Chemical-Resistant EPDM



		1/16"	3/8"	11/32"	Not Rated	Black	100	9286K51	000000
		1/16"	19/32"	19/32"	Not Rated	Black	100	9286K52	00000
		1/16"	11/16"	11/16"	Not Rated	Black	50	9286K73	00000
		3/32"	19/32"	17/32"	Not Rated	Black	10	9286K24	0000
		1/8"	5/8"	5/8"	Not Rated	Black	10	9286K25	0000
		1/8"	21/32"	11/16"	Not Rated	Black	50	9286K75	00000
		5/32"	17/32"	5/8"	Not Rated	Black	10	9286K26	0000
		5/32"	5/8"	5/8"	Not Rated	Black	50	9286K76	00000
		3/16"	19/32"	5/8"	Not Rated	Black	10	9286K27	0000
		3/16"	1"	1"	Not Rated	Black	50	9286K77	00000


		7/32"	31/32"	1"	Not Rated	Black	10	9286K28	0000
		1/4"	15/16"	15/16"	Not Rated	Black	50	9286K78	00000
		1/4"	1"	1"	Not Rated	Black	50	9286K81	00000
		5/16"	3/4"	1 3/32"	Not Rated	Black	50	9286K82	00000
		11/32"	7/8"	15/16"	Not Rated	Black	50	9286K79	00000
		3/8"	1"	1"	Not Rated	Black	25	9286K83	00000
		13/32"	1"	1"	Not Rated	Black	25	9286K61	00000
		7/16"	1"	1"	Not Rated	Black	25	9286K84	00000
		15/32"	29/32"	1"	Not Rated	Black	10	9286K29	0000
		15/32"	1"	1"	Not Rated	Black	10	9286K62	0000


		1/2"	1"	31/32"	Not Rated	Black	10	9286K48	00000
		1/2"	1"	1"	Not Rated	Black	10	9286K63	00000
		19/32"	1"	1"	Not Rated	Black	10	9286K54	0000
		5/8"	1"	1"	Not Rated	Black	10	9286K64	00000
		11/16"	1 1/4"	1 5/16"	Not Rated	Black	10	9286K49	00000
		23/32"	1 1/8"	1 1/8"	Not Rated	Black	10	9286K69	00000
		3/4"	1"	15/16"	Not Rated	Black	10	9286K65	00000
		25/32"	1 1/4"	1 1/4"	Not Rated	Black	10	9286K89	00000
		7/8"	1"	1"	Not Rated	Black	10	9286K66	00000
		1"	1"	31/32"	Not Rated	Black	10	9286K67	00000


		High-Temperature Silicone Rubber



				1/16"	3/8"	5/16"	600	Clear	50	2903K1	0000
				1/16"	5/8"	9/16"	600	Green	50	2903K2	0000
				3/32"	11/16"	11/16"	600	Gray	25	2903K3	0000
				1/8"	21/32"	11/16"	600	Pink	25	2903K4	00000
				5/32"	5/8"	5/8"	600	Gray	25	2903K5	00000
				3/16"	31/32"	29/32"	600	Clear	25	2903K6	00000
				1/4"	1"	31/32"	600	Green	25	2903K17	00000
				9/32"	15/16"	7/8"	600	Yellow	25	2903K7	00000
				5/16"	3/4"	1 1/16"	600	Blue	25	2903K18	00000
				11/32"	7/8"	13/16"	600	Clear	25	2903K8	00000


				3/8"	1"	29/32"	600	Pink	25	2903K19	00000
				13/32"	1"	1"	600	Green	25	2903K9	00000
				7/16"	1"	1"	600	Gray	25	2903K21	00000
				15/32"	1"	1"	600	Blue	25	2903K11	00000
				1/2"	1"	25/32"	600	Clear	10	2903K22	00000
				17/32"	1"	1"	600	Pink	10	2903K12	00000
				5/8"	1"	31/32"	600	Gray	10	2903K13	00000
				11/16"	1 1/4"	1 9/32"	600	Blue	10	2903K23	00000
				3/4"	1"	15/16"	600	Clear	5	2903K14	00000
7/8"				1"	1"	600	Green	5	2903K15	00000


1"	1"			15/16"	600	Yellow	5	2903K16	00000