Expander Plugs | McMaster-Carr

Filter by

System of Measurement

Counterbore Diameter

Sealing Diameter

Sleeve Material

18-8 Stainless Steel

Aluminum

Steel

Plug Connection Method

Material

Ball Material

For Use With

Installed Height

Minimum Counterbore Depth

Maximum Pressure

Export Control Classification Number (ECCN)

2B999

EAR99

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

REACH

RoHS

Thread Size

Hardness

DFARS Specialty Metals

Sleeve Finish

Finish

Pin Material

Thread Pitch

95 Products

Push-In Bore Sealing Plugs

Image of Attribute. Side1 orientation. CrossSection view. Contains Annotated. Push-In Bore Sealing Plugs .

Permanently seal unthreaded, counterbored holes in manifolds and other pneumatic or hydraulic components. These plugs resist vibration better than threaded plugs and don’t require thread sealant. They consist of a serrated sleeve with a ball bearing inside. When installed, the bearing is pushed inside the sleeve. This expands the sleeve so its serrations bite into the walls of the hole, sealing it shut.

Unlike plugs that install with an air- or hydraulic-powered tool, these plugs don’t require power to install. However, they’re harder to fit into angled or deep holes. To install, drive the installation tool (sold separately) into the plug with a hammer or arbor press.

Aluminum Sleeve—Plugs with an aluminum sleeve are ideal for plugging holes in aluminum manifolds. They resist corrosion in wet environments. These plugs are also lighter in weight than our other plugs, but they won’t handle pressures as high.

Zinc-Plated Steel Sleeve—Plugs with a steel sleeve can handle higher pressures than aluminum-sleeved plugs, but not as much as those with a stainless steel sleeve. They’re zinc plated for corrosion resistance in wet environments, but they’ll corrode from salt water and chemicals.

18-8 Stainless Steel Sleeve—Plugs with a stainless steel sleeve work in the highest pressures of any sleeve material, so they’re the best choice for hydraulic applications. They also have good corrosion resistance.

		Counterbore
	Sealing Dia.	Dia.	Min. Dp.	Installed Ht.	Max. Pressure, psi	Max. Temp., ° F	Pkg. Qty.		Pkg.
Aluminum Sleeve



		1/8"	5/32"	0.113"	1/8"	2,100	300	5	6357N28	000000


		1/8"	5/32"	0.149"	5/32"	3,000	300	5	6357N23	00000
		5/32"	3/16"	0.17"	3/16"	2,100	300	5	6357N29	00000
		5/32"	3/16"	0.208"	7/32"	3,000	300	5	6357N24	00000
		3/16"	7/32"	0.17"	3/16"	2,100	300	1	6357N35	0000
		3/16"	7/32"	0.208"	7/32"	3,000	300	1	6357N32	0000
		7/32"	1/4"	0.196"	7/32"	2,100	300	1	6357N37	0000
		7/32"	1/4"	0.247"	1/4"	3,000	300	1	6357N39	0000
		1/4"	9/32"	0.233"	1/4"	2,100	300	1	6357N46	0000
		1/4"	9/32"	0.287"	19/64"	3,000	300	1	6357N44	0000
		9/32"	5/16"	0.255"	9/32"	2,100	300	1	6357N51	0000


		9/32"	5/16"	0.326"	21/64"	3,000	300	5	6357N15	00000
		5/16"	11/32"	0.275"	5/16"	2,100	300	5	6357N25	00000
		5/16"	11/32"	0.385"	25/64"	3,000	300	5	6357N19	00000
		11/32"	3/8"	0.385"	25/64"	3,000	300	5	6357N27	00000
		3/8"	13/32"	0.308"	23/64"	2,100	300	1	6357N49	0000
		3/8"	13/32"	0.425"	7/16"	3,000	300	1	6357N47	0000
		2.3 mm	3 mm	2.9 mm	3.18 mm	3,000	300	5	6357N17	00000
		3.3 mm	4 mm	3.8 mm	4 mm	3,000	300	5	6357N21	00000
		5.3 mm	6 mm	6.3 mm	6.5 mm	3,000	300	1	6357N33	0000
		6.2 mm	7 mm	7.3 mm	7.5 mm	3,000	300	1	6357N36	0000


		9.2 mm	10 mm	10.8 mm	11 mm	3,000	300	5	6357N26	00000
		11 mm	12 mm	12.8 mm	13 mm	1,500	300	1	6357N41	0000


		Zinc-Plated Steel Sleeve



				2.2 mm	3 mm	3.4 mm	3.6 mm	4,600	300	5	6357N14	00000


				3.3 mm	4 mm	3.8 mm	4 mm	4,600	300	5	6357N11	0000
				4.3 mm	5 mm	5.3 mm	5.5 mm	4,600	300	5	6357N12	0000
				5.3 mm	6 mm	6.3 mm	6.5 mm	4,600	300	5	6357N13	00000
				6.4 mm	7 mm	7.3 mm	7.5 mm	4,600	300	5	6357N16	00000
				7.4 mm	8 mm	8.3 mm	8.5 mm	4,600	300	1	6357N31	0000
				8.4 mm	9 mm	9.8 mm	10 mm	4,600	300	1	6357N43	0000
				9.4 mm	10 mm	10.8 mm	11 mm	4,600	300	1	6357N53	0000
				10.6 mm	12 mm	12.8 mm	13 mm	3,600	300	1	6357N54	00000
				12.7 mm	14 mm	14.5 mm	15 mm	3,600	300	1	6357N56	00000
				14.7 mm	16 mm	16.5 mm	17 mm	3,600	300	1	6357N58	00000


				16.7 mm	18 mm	18.5 mm	19 mm	3,600	300	1	6357N61	00000
				18.7 mm	20 mm	21.5 mm	22 mm	3,600	300	1	6357N65	00000
				20.7 mm	22 mm	24.5 mm	25 mm	3,600	300	1	6357N66	00000


				18-8 Stainless Steel Sleeve



						1/16"	3/32"	0.081"	3/32"	5,500	300	5	24675K35	0000


3/32"	1/8"					0.113"	1/8"	5,500	300	5	24675K32	0000
1/8"	5/32"					0.13"	5/32"	5,500	300	5	24675K81	00000
5/32"	3/16"					0.152"	13/64"	5,500	300	5	24675K82	00000
3/16"	7/32"					0.187"	7/32"	5,500	300	5	24675K83	00000
7/32"	1/4"					0.212"	17/64"	5,500	300	5	24675K84	00000
1/4"	9/32"					1/4"	9/32"	5,500	300	5	24675K85	00000
9/32"	5/16"					0.327"	21/64"	5,500	300	5	24675K86	00000
5/16"	11/32"					0.385"	25/64"	5,500	300	1	24675K87	0000
11/32"	3/8"					0.425"	25/64"	5,500	300	1	24675K88	0000
3/8"	13/32"					0.425"	7/16"	4,000	300	1	24675K89	0000


13/32"	7/16"					0.503"	33/64"	4,000	300	1	24675K91	0000
7/16"	15/32"					0.504"	33/64"	4,000	300	1	24675K92	0000
2.2 mm	3 mm					3.4 mm	3.6 mm	5,500	300	1	6357N34	0000
3.3 mm	4 mm					3.8 mm	4 mm	5,500	300	1	6357N42	0000
4.3 mm	5 mm					5.3 mm	5.5 mm	5,500	300	1	6357N45	0000
5.3 mm	6 mm					6.3 mm	6.5 mm	5,500	300	1	6357N52	0000
6.4 mm	7 mm					7.3 mm	7.5 mm	5,500	300	1	6357N55	00000
7.4 mm	8 mm					8.3 mm	8.5 mm	5,500	300	1	6357N57	00000
8.4 mm	9 mm					9.8 mm	10 mm	5,500	300	1	6357N59	00000
9.4 mm	10 mm					10.8 mm	11 mm	5,500	300	1	6357N63	00000


10.6 mm	12 mm					12.8 mm	13 mm	4,100	300	1	6357N62	00000
12.7 mm	14 mm					14.5 mm	15 mm	4,100	300	1	6357N64	00000

Bore Sealing Plug Installation Tools

	Dia.	Lg.		Each
Steel



	3/32"	3/8"	5"	24675K33	000000


	1/8", 3 mm	3/8"	5"	6404N11	00000
	5/32", 4 mm	3/8"	5"	24675K41	00000
	3/16"	3/8"	5"	24675K42	00000
	7/32", 5 mm	3/8"	5"	24675K43	00000
	1/4", 6 mm	3/8"	5"	24675K44	00000
	9/32", 7 mm	3/8"	5"	24675K45	00000
	5/16", 8 mm	3/8"	5"	24675K46	00000
	11/32", 9 mm	5/8"	5"	24675K47	00000
	3/8"	5/8"	5"	24675K48	00000
	13/32", 10 mm	5/8"	5"	24675K49	00000


	7/16"	5/8"	5"	24675K51	00000
	15/32", 12 mm	5/8"	5"	24675K52	00000
	9/16", 14 mm	3/4"	5"	6404N12	000000
	5/8", 16 mm	3/4"	5"	6404N13	000000
	11/16", 18 mm	3/4"	5"	6404N14	000000
	25/32", 20 mm	1"	5"	6404N15	000000
	7/8", 22 mm	1"	5"	6404N16	000000

Pull-Through Bore Sealing Plugs

Permanently plug unused holes–even deep or angled ones—in manifolds and other hydraulic or pneumatic components. The required installation tool reaches inside holes to expand these plugs with the pull of a trigger, making them a good choice for high-volume assembly. The tool lets you install them without risking damage to your equipment, unlike most plugs that have to be hammered in place. These plugs resist vibration better than threaded plugs and don’t require thread sealant.

They consist of a serrated sleeve with an internally threaded pin inside it. To install, you’ll need the installation tool fitted with a mandrel and nosepiece set (both sold separately). Thread your plug onto the mandrel, then position the plug within your hole. Press the tool’s trigger to pull the plug’s pin through the sleeve, expanding it. The outer serrations will bite into the hole to seal it shut. After expanding, the tool will automatically reverse its spin to pull away from the pin.

Aluminum Sleeve—Aluminum-sleeved plugs weigh less than steel-sleeved plugs, and they’re better at resisting corrosion from air and water. However, they won’t handle pressures as high as steel-sleeved plugs. They’re ideal for plugging aluminum manifolds.

Black-Oxide Steel Sleeve—Steel-sleeved plugs handle pressures more than twice as high as aluminum-sleeved plugs. This makes them a better choice for hydraulic components.

	Installed Ht.	Max. Pressure, psi	Max. Temp., ° F	Thread Size	Pkg. Qty.		Pkg.
Aluminum Sleeve



	13/64"	11/64"	2,000	300	4-40	5	6272N11	000000


	6 mm	5 mm	2,000	300	M3 × 0.5 mm	5	6272N12	00000
	8 mm	6.5 mm	2,000	300	M4 × 0.7 mm	5	6272N13	00000
	10 mm	6.5 mm	2,000	300	M5 × 0.8 mm	5	6272N14	00000


	Black-Oxide Steel Sleeve



			13/64"	7/32"	4,500	300	4-40	5	6272N16	00000


			15/64"	1/4"	4,500	300	6-32	5	6272N17	00000
			4.5 mm	4 mm	4,500	300	M2 × 0.4 mm	5	6272N15	00000
			8 mm	8.5 mm	4,500	300	M4 × 0.7 mm	5	6272N18	00000
			10 mm	10.5 mm	4,500	300	M6 × 1 mm	5	6272N19	00000

Accessories for Bore Sealing Plugs

Bore Sealing Plug Installation Tools

					Air Connection			Body
For Thread Size	Stroke Lg.	Operating Pressure, psi	Pulling Force, lbf	Wt., lb.	Pipe Size	Thread Type	Gender	Dia.	Wd.	Head Lg.	Overall Ht.		Each



	4-40, 6-32, M2, M3, M4, M5, M6	0.04" to 0.28"	75 to 100	5,000	4	1/4	NPT	Female	4 5/16"	1"	10 1/4"	10 1/2"	6388N11	000000000

Mandrel and Nosepiece Sets

For Thread Size	Max. Thread Lg.	Includes		Each
4-40	45/64"	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N11	0000000
6-32	49/64"	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N12	000000
M2 × 0.4 mm	6 mm	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N16	000000
M3 × 0.5 mm	11.8 mm	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N26	000000
M4 × 0.7 mm	14.8 mm	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N14	000000
M5 × 0.8 mm	15.6 mm	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N27	000000
M6 × 1 mm	27.4 mm	Mandrel, Anvil, Hex Driver, Lock Nut, Sleeve	6408N15	000000