Plugs for Compressed Air

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	0000000	000000


		1/8"	5/32"	0.149"	5/32"	3,000	300	5	0000000	00000
		5/32"	3/16"	0.17"	3/16"	2,100	300	5	0000000	00000
		5/32"	3/16"	0.208"	7/32"	3,000	300	5	0000000	00000
		3/16"	7/32"	0.17"	3/16"	2,100	300	1	0000000	0000
		3/16"	7/32"	0.208"	7/32"	3,000	300	1	0000000	0000
		7/32"	1/4"	0.196"	7/32"	2,100	300	1	0000000	0000
		7/32"	1/4"	0.247"	1/4"	3,000	300	1	0000000	0000
		1/4"	9/32"	0.233"	1/4"	2,100	300	1	0000000	0000
		1/4"	9/32"	0.287"	19/64"	3,000	300	1	0000000	0000
		9/32"	5/16"	0.255"	9/32"	2,100	300	1	0000000	0000


		9/32"	5/16"	0.326"	21/64"	3,000	300	5	0000000	00000
		5/16"	11/32"	0.275"	5/16"	2,100	300	5	0000000	00000
		5/16"	11/32"	0.385"	25/64"	3,000	300	5	0000000	00000
		11/32"	3/8"	0.385"	25/64"	3,000	300	5	0000000	00000
		3/8"	13/32"	0.308"	23/64"	2,100	300	1	0000000	0000
		3/8"	13/32"	0.425"	7/16"	3,000	300	1	0000000	0000
		2.3 mm	3 mm	2.9 mm	3.18 mm	3,000	300	5	0000000	00000
		3.3 mm	4 mm	3.8 mm	4 mm	3,000	300	5	0000000	00000
		5.3 mm	6 mm	6.3 mm	6.5 mm	3,000	300	1	0000000	0000
		6.2 mm	7 mm	7.3 mm	7.5 mm	3,000	300	1	0000000	0000


		9.2 mm	10 mm	10.8 mm	11 mm	3,000	300	5	0000000	00000
		11 mm	12 mm	12.8 mm	13 mm	1,500	300	1	0000000	0000


		Zinc-Plated Steel Sleeve



				2.2 mm	3 mm	3.4 mm	3.6 mm	4,600	300	5	0000000	00000


				3.3 mm	4 mm	3.8 mm	4 mm	4,600	300	5	0000000	0000
				4.3 mm	5 mm	5.3 mm	5.5 mm	4,600	300	5	0000000	0000
				5.3 mm	6 mm	6.3 mm	6.5 mm	4,600	300	5	0000000	0000
				6.4 mm	7 mm	7.3 mm	7.5 mm	4,600	300	5	0000000	00000
				7.4 mm	8 mm	8.3 mm	8.5 mm	4,600	300	1	0000000	0000
				8.4 mm	9 mm	9.8 mm	10 mm	4,600	300	1	0000000	0000
				9.4 mm	10 mm	10.8 mm	11 mm	4,600	300	1	0000000	0000
				10.6 mm	12 mm	12.8 mm	13 mm	3,600	300	1	0000000	00000
				12.7 mm	14 mm	14.5 mm	15 mm	3,600	300	1	0000000	00000
				14.7 mm	16 mm	16.5 mm	17 mm	3,600	300	1	0000000	00000


				16.7 mm	18 mm	18.5 mm	19 mm	3,600	300	1	0000000	00000
				18.7 mm	20 mm	21.5 mm	22 mm	3,600	300	1	0000000	00000
				20.7 mm	22 mm	24.5 mm	25 mm	3,600	300	1	0000000	00000


				18-8 Stainless Steel Sleeve



						1/16"	3/32"	0.081"	3/32"	5,500	300	5	00000000	0000


3/32"	1/8"					0.113"	1/8"	5,500	300	5	00000000	0000
1/8"	5/32"					0.13"	5/32"	5,500	300	5	00000000	00000
5/32"	3/16"					0.152"	13/64"	5,500	300	5	00000000	00000
3/16"	7/32"					0.187"	7/32"	5,500	300	5	00000000	00000
7/32"	1/4"					0.212"	17/64"	5,500	300	5	00000000	00000
1/4"	9/32"					1/4"	9/32"	5,500	300	5	00000000	00000
9/32"	5/16"					0.327"	21/64"	5,500	300	5	00000000	00000
5/16"	11/32"					0.385"	25/64"	5,500	300	1	00000000	0000
11/32"	3/8"					0.425"	25/64"	5,500	300	1	00000000	0000
3/8"	13/32"					0.425"	7/16"	4,000	300	1	00000000	0000


13/32"	7/16"					0.503"	33/64"	4,000	300	1	00000000	0000
7/16"	15/32"					0.504"	33/64"	4,000	300	1	00000000	0000
2.2 mm	3 mm					3.4 mm	3.6 mm	5,500	300	1	0000000	0000
3.3 mm	4 mm					3.8 mm	4 mm	5,500	300	1	0000000	0000
4.3 mm	5 mm					5.3 mm	5.5 mm	5,500	300	1	0000000	0000
5.3 mm	6 mm					6.3 mm	6.5 mm	5,500	300	1	0000000	0000
6.4 mm	7 mm					7.3 mm	7.5 mm	5,500	300	1	0000000	00000
7.4 mm	8 mm					8.3 mm	8.5 mm	5,500	300	1	0000000	00000
8.4 mm	9 mm					9.8 mm	10 mm	5,500	300	1	0000000	00000
9.4 mm	10 mm					10.8 mm	11 mm	5,500	300	1	0000000	00000


10.6 mm	12 mm					12.8 mm	13 mm	4,100	300	1	0000000	00000
12.7 mm	14 mm					14.5 mm	15 mm	4,100	300	1	0000000	00000

Bore Sealing Plug Installation Tools

	Dia.	Lg.		Each
Steel



	3/32"	3/8"	5"	00000000	000000


	1/8", 3 mm	3/8"	5"	0000000	00000
	5/32", 4 mm	3/8"	5"	00000000	00000
	3/16"	3/8"	5"	00000000	00000
	7/32", 5 mm	3/8"	5"	00000000	00000
	1/4", 6 mm	3/8"	5"	00000000	00000
	9/32", 7 mm	3/8"	5"	00000000	00000
	5/16", 8 mm	3/8"	5"	00000000	00000
	11/32", 9 mm	5/8"	5"	00000000	00000
	3/8"	5/8"	5"	00000000	00000
	13/32", 10 mm	5/8"	5"	00000000	00000


	7/16"	5/8"	5"	00000000	00000
	15/32", 12 mm	5/8"	5"	00000000	00000
	9/16", 14 mm	3/4"	5"	0000000	000000
	5/8", 16 mm	3/4"	5"	0000000	000000
	11/16", 18 mm	3/4"	5"	0000000	000000
	25/32", 20 mm	1"	5"	0000000	000000
	7/8", 22 mm	1"	5"	0000000	000000

Weld-On Sights

Weld these sights to single-wall tanks. They’re often used to monitor contents in process vessels, mixers, and bulk containers.

316L Stainless Steel with Glass Window


With Screw-Together Window (Unassembled)	With Screw-Together Window

316L stainless steel sights are more corrosion resistant than 304 stainless steel sights.

With Screw-Together Window—Sights with a screw-together window make it easier to access your tank and clean the window than sights with a bolt-on window. To install these sights, place the body in a hole on your tank wall and weld it. Then twist on the window and tighten with a spanner wrench.

DIN 11851—DIN 11851 rated sights meet dairy fitting standards.

Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Seal Material	Specs. Met		Each







With Screw-Together Window

2"	3 5/8"	2"	150 psi @ 70° F	-20 to 390	Water, Hydraulic Fluid, Compressed Air	Silicone Rubber	DIN 11851	0000000	0000000


2 1/2"	4 7/16"	2 1/2"	150 psi @ 70° F	-20 to 390	Water, Hydraulic Fluid, Compressed Air	Silicone Rubber	DIN 11851	0000000	000000
3 1/8"	5"	3 1/8"	150 psi @ 70° F	-20 to 390	Water, Hydraulic Fluid, Compressed Air	Silicone Rubber	DIN 11851	0000000	000000
4"	5 13/16"	4"	150 psi @ 70° F	-20 to 390	Water, Hydraulic Fluid, Compressed Air	Silicone Rubber	DIN 11851	0000000	000000
5"	7"	5"	90 psi @ 70° F	-20 to 390	Water, Hydraulic Fluid, Compressed Air	Silicone Rubber	DIN 11851	0000000	00000000

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	0000000	000000


	6 mm	5 mm	2,000	300	M3 × 0.5 mm	5	0000000	00000
	8 mm	6.5 mm	2,000	300	M4 × 0.7 mm	5	0000000	00000
	10 mm	6.5 mm	2,000	300	M5 × 0.8 mm	5	0000000	00000


	Black-Oxide Steel Sleeve



			13/64"	7/32"	4,500	300	4-40	5	0000000	00000


			15/64"	1/4"	4,500	300	6-32	5	0000000	00000
			4.5 mm	4 mm	4,500	300	M2 × 0.4 mm	5	0000000	00000
			8 mm	8.5 mm	4,500	300	M4 × 0.7 mm	5	0000000	00000
			10 mm	10.5 mm	4,500	300	M6 × 1 mm	5	0000000	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"	0000000	000000000

Mandrel and Nosepiece Sets

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

Sights for Quick-Clamp Sanitary Tube Fittings

Sight Shown Assembled

With Gasket, Quick-Clamp

Fitting, And Tube

Fitting (All Sold

Separately)

Monitor food, brewery, chemical, pharmaceutical, and biotech processing lines with these sights that attach to quick-clamp fittings for fast installation and easy removal for cleaning. All have a one-piece design, so there are no crevices where bacteria can grow. A quick-clamp fitting, gasket, and tube fitting are required (sold separately).

304 Stainless Steel with Plastic Window

304 stainless steel sights have a ring that's embedded around their shatter-resistant plastic window. This design protects the sights from chipping or cracking while under the stress of the quick-clamp fitting. All withstand harsh cleaners and sanitizers for clean-in-place (CIP) and steam-in-place (SIP) applications. They do not contain Bisphenol A (BPA), Bisphenol B (BPB), or BPA derivatives (BPX), which are chemicals that can contaminate your process lines. All meet ASME BPE design standards for bioprocessing equipment that ensure purity and safety.

				Temperature Range
For Tube OD	For Flange OD	Window Dia.	Max. Pressure @ Temp.	Min.	Max., ° F	For Use With	Features	Specs. Met		Each
1"	1.98"	1 1/4"	150 psi @ 70° F	Not Rated	200	Water, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam	With One-Piece Construction	ASME BPE	0000000	0000000
2"	2.52"	1 3/4"	150 psi @ 70° F	Not Rated	200	Water, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam	With One-Piece Construction	ASME BPE	0000000	000000
4"	4.68"	3 1/4"	30 psi @ 70° F	Not Rated	200	Water, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Compressed Air, Salt Water, Steam	With One-Piece Construction	ASME BPE	0000000	000000

2205 Stainless Steel with Glass Window

For superior strength and reliability, choose 2205 stainless steel sights. All have a glass window that’s melted around a high-strength ring, so they won’t shatter, leak, or lose their shape under high pressure, heat, chemicals, or impact. They withstand harsh cleaners and sanitizers for clean-in-place (CIP) and steam-in-place (SIP) applications. USP Class VI and TUV Rheinland Certified, these sights meet safety standards in the U.S. and Europe. They also meet DIN standards for glass materials used in sights, ASTM standards for materials used in boilers and pressure vessels, and ASME BPE design standards for bioprocessing equipment that ensure purity and safety.

Max. Pressure @ Temp.	Temp. Range, ° F	For Use With	Specs. Met	Certification	USP Class		Each







With One-Piece Construction

1", 1 1/2"	1.98"	1"	230 psi @ 70° F	-40 to 500	Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam	ASME BPE, ASTM A479, DIN 7079, DIN 7080	TUV Rheinland Certified	VI	0000000	0000000


2"	2.52"	1 3/16"	230 psi @ 70° F	-40 to 500	Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam	ASME BPE, ASTM A479, DIN 7079, DIN 7080	TUV Rheinland Certified	VI	0000000	000000
3"	3.58"	1 1/2"	150 psi @ 70° F	-40 to 500	Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam	ASME BPE, ASTM A479, DIN 7079, DIN 7080	TUV Rheinland Certified	VI	0000000	000000
4"	4.68"	2 3/16"	150 psi @ 70° F	-40 to 500	Water, Hydraulic Fluid, Diesel Fuel, Acetic Acid (White Vinegar), Air, Alcohol-Based Solvents, Beverage, Chemicals, Compressed Air, Food, Fuel Oil, Gasoline, Inert Gas, Ketone, Oil, Salt Water, Steam	ASME BPE, ASTM A479, DIN 7079, DIN 7080	TUV Rheinland Certified	VI	0000000	000000