Drop-In Anchors | McMaster-Carr

	Thread Size Thread Size

8-32

10-24

	Anchor Type Anchor Type


Female Threaded	Plug

	For Use In For Use In

	Material Material

Steel

Stainless Steel

Zinc

	Screw Size Screw Size

	Minimum Installation Depth Minimum Installation Depth

	Drill Bit Size Drill Bit Size

	Length Length

	Diameter Diameter

	Pull-Out Strength Pull-Out Strength

2,000 lbs. or greater

	Shear Strength Shear Strength

2,000 lbs. or greater

Not Rated

	Thread Type Thread Type

UNC

Coil

	Thread Depth Thread Depth

	Drill Bit Decimal Size Equivalent Drill Bit Decimal Size Equivalent

	Thread Fit Thread Fit

Class 2A

Class 2B

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

	Sleeve Material Sleeve Material

Lead

Zinc

Stainless Steel

	For Thread Depth For Thread Depth

	For Screw Size For Screw Size

	Closed Length Closed Length

2 1/4"

	Open Length Open Length

2 1/4"

2 3/4"

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86 Products

Steel Female-Threaded Anchors for Concrete

Anchor

Flanged Anchor

A zinc plating provides corrosion resistance in wet environments. Also known as drop-in anchors, these are often used for overhead applications because the anchor's internal plug expands in four directions to hold the anchor firmly inside the hole before inserting a threaded rod or bolt. To install, place the anchor into the hole, insert the required installation tool (sold separately) into the anchor, and drive with a hammer until the thicker portion of the tool makes contact with the anchor. Pull-out strength and shear strength values are 25% of the ultimate values.

Anchors can be installed below the base of the surface as well as flush with the surface. Use those with a coil thread to support temporary concrete formwork. Their threads are shallow and widely spaced for quick threading with a compatible rod or bolt. They are not for permanent applications.

Flanged anchors are easy to set in holes that are longer than the anchor. They sit flush with the surface when installed.

For technical drawings and 3-D models, click on a part number.

						Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Thread Dp.	Pull-Out	Shear	Tested In	Specifications Met	Pkg. Qty.		Pkg.
Zinc-Plated Carbon Steel
Anchor with Coil Threads
1/2"-6	2"	5/8"	2"	5/8"	13/16"	1,440	1,600	2,000 psi Concrete	FM Approved, UL Listed	1	000000000	00000
3/4"-4 1/2	3 3/16"	1"	3 3/16"	1"	1 3/8"	2,350	3,920	2,000 psi Concrete	FM Approved, UL Listed	1	000000000	0000
Anchor with UNC Threads
1/4"-20	1"	3/8"	1"	3/8"	7/16"	495	530	4,000 psi Concrete	__	25	000000000	0000
3/8"-16	1 9/16"	1/2"	1 9/16"	1/2"	5/8"	1,045	1,145	4,000 psi Concrete	FM Approved, UL Listed	10	000000000	0000
1/2"-13	2"	5/8"	2"	5/8"	13/16"	1,440	1,600	4,000 psi Concrete	FM Approved, UL Listed	10	000000000	00000
5/8"-11	2 1/2"	7/8"	2 1/2"	7/8"	1 3/16"	1,860	3,095	4,000 psi Concrete	FM Approved, UL Listed	4	000000000	00000
3/4"-10	3 3/16"	1"	3 3/16"	1"	1 3/8"	2,350	3,920	4,000 psi Concrete	FM Approved, UL Listed	1	000000000	0000
Flanged Anchor with UNC Threads
1/4"-20	5/8"	3/8"	5/8"	3/8"	3/8"	1,150	1,650	2,000 psi Concrete	FM Approved, UL Listed	10	000000000	0000
1/4"-20	1"	3/8"	1"	3/8"	7/16"	495	530	2,000 psi Concrete	FM Approved, UL Listed	10	000000000	0000
3/8"-16	3/4"	1/2"	3/4"	1/2"	13/32"	2,120	4,220	2,000 psi Concrete	FM Approved, UL Listed	10	000000000	0000
3/8"-16	1 9/16"	1/2"	1 9/16"	1/2"	5/8"	945	1,030	2,000 psi Concrete	FM Approved, UL Listed	10	000000000	0000
1/2"-13	1"	5/8"	1"	5/8"	5/8"	3,360	3,750	2,000 psi Concrete	FM Approved, UL Listed	1	000000000	0000
1/2"-13	2"	5/8"	2"	5/8"	13/16"	1,440	1,600	2,000 psi Concrete	FM Approved, UL Listed	5	000000000	0000

18-8 Stainless Steel Female-Threaded Anchors for Concrete

These 18-8 stainless steel anchors have good chemical resistance and may be mildly magnetic. Also known as drop-in anchors, they're often used for overhead applications because the anchor's internal plug expands in four directions to hold the anchor firmly inside the hole before inserting a threaded rod or bolt. To install, place the anchor into the hole, insert the required installation tool (sold separately) into the anchor, and drive with a hammer until the thicker portion of the tool makes contact with the anchor. When installed, anchors sit flush with the surface. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

						Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Thread Dp.	Pull-Out	Shear	Tested In	Pkg. Qty.		Pkg.
18-8 Stainless Steel
1/4"-20	1"	3/8"	1"	3/8"	7/16"	495	530	4,000 psi Concrete	4	000000000	000000
3/8"-16	1 9/16"	1/2"	1 9/16"	1/2"	5/8"	1,045	1,145	4,000 psi Concrete	1	000000000	0000
1/2"-13	2"	5/8"	2"	5/8"	13/16"	1,440	1,600	4,000 psi Concrete	1	000000000	0000
5/8"-11	2 1/2"	7/8"	2 1/2"	7/8"	1 3/16"	1,860	3,095	4,000 psi Concrete	1	000000000	00000
3/4"-10	3 3/16"	1"	3 3/16"	1"	1 3/8"	2,350	3,920	4,000 psi Concrete	1	000000000	00000

Super-Corrosion-Resistant 316 Stainless Steel Female-Threaded Anchors for Concrete

More corrosion resistant than 18-8 stainless steel anchors, these 316 stainless steel anchors have excellent resistance to chemicals and salt water and may be mildly magnetic. Also known as drop-in anchors, they're often used for overhead applications because the anchor's internal plug expands in four directions to hold the anchor firmly inside the hole before inserting a threaded rod or bolt. To install, place the anchor into the hole, insert the required installation tool (sold separately) into the anchor, and drive with a hammer until the thicker portion of the tool makes contact with the anchor. When installed, anchors sit flush with the surface. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

						Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Thread Dp.	Pull-Out	Shear	Tested In	Pkg. Qty.		Pkg.
316 Stainless Steel
1/4"-20	1"	3/8"	1"	3/8"	7/16"	495	530	4,000 psi Concrete	1	000000000	00000
3/8"-16	1 9/16"	1/2"	1 9/16"	1/2"	5/8"	1,045	1,145	4,000 psi Concrete	1	000000000	0000
1/2"-13	2"	5/8"	2"	5/8"	13/16"	1,440	1,600	4,000 psi Concrete	1	000000000	00000
5/8"-11	2 1/2"	7/8"	2 1/2"	7/8"	1 3/16"	1,860	3,095	4,000 psi Concrete	1	000000000	00000
3/4"-10	3 3/16"	1"	3 3/16"	1"	1 3/8"	2,350	3,920	4,000 psi Concrete	1	000000000	00000

Installation Tools for Female-Threaded Anchors

Drive these tools with a hammer to expand anchors.

For technical drawings and 3-D models, click on a part number.

Steel
For Thread Size	For Thread Depth	Lg.	For Use In	Pkg. Qty.		Pkg.
1/4"-20	3/8"	6"	Concrete	1	000000000	000000
						Each
1/4"-20	7/16"	4 3/4"	Concrete	__	000000000	0000
						Pkg.
3/8"-16	13/32"	8"	Concrete	1	000000000	00000
						Each
3/8"-16	5/8"	5 5/8"	Concrete	__	000000000	0000
1/2"-13	13/16"	6 1/16"	Concrete	__	000000000	0000
						Pkg.
1/2"-13	5/8"	8"	Concrete	1	000000000	00000
						Each
5/8"-11	1-3/16"	6 9/16"	Concrete	__	000000000	0000
3/4"-10	1-3/8"	7 1/16"	Concrete	__	000000000	00000

Easy-Install Female-Threaded Anchors for Concrete

Install like a stud anchor—just thread the anchor, a nut, and a washer onto the end of a threaded rod, drive into a hole, and turn the nut to expand the base. Also known as rod anchors, they're often used with threaded rod to hang pipe and wiring. Anchors should be recessed; install to any depth greater than the minimum installation depth. Made from zinc-plated steel, they resist corrosion in wet environments. Pull-out strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

						Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Thread Dp.	Pull-Out	Shear	Tested In	Pkg. Qty.		Pkg.
Zinc-Plated Steel
1/4"-20	2 1/4"	3/8"	2 1/4"	3/8"	21/32"	__	Not Rated	__	4	000000000	000000
3/8"-16	2 3/8"	1/2"	3"	1/2"	1"	850	Not Rated	3,000 psi Concrete	4	000000000	00000
1/2"-13	2 1/2"	5/8"	3 1/4"	5/8"	7/8"	1,300	Not Rated	3,000 psi Concrete	2	000000000	00000

Shallow-Hole Female-Threaded Anchors for Block and Brick

Also known as caulk-in anchors, these stay secure when there's not much material to hold. When installed, the cone expands the sleeve to hold it firmly inside the hole. To install, insert the anchor cone end first and use an installation tool to drive the sleeve over the cone. Then, insert a screw or threaded rod and tighten. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

Anchors

						Strength, lbs.
Thread Size	Lg.	Min. Installation Dp.	Drill Bit Size	Dia.	Sleeve Material	Pull-Out	Shear	Tested In	For Use In	Pkg. Qty.		Pkg.
Zinc Alloy
8-32	9/16"	1/2"	5/16"	5/16"	Lead	85	85	4,000 psi Concrete	Block, Brick, Concrete	25	000000000	000000
10-24	3/4"	5/8"	3/8"	3/8"	Lead	230	220	4,000 psi Concrete	Block, Brick, Concrete	25	000000000	00000
1/4"-20	7/8"	7/8"	1/2"	1/2"	Lead	370	350	4,000 psi Concrete	Block, Brick, Concrete	25	000000000	0000
5/16"-18	1"	1"	5/8"	5/8"	Lead	470	500	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	00000
3/8"-16	1 1/4"	1 1/4"	3/4"	3/4"	Lead	600	820	4,000 psi Concrete	Block, Brick, Concrete	5	000000000	0000
1/2"-13	1 9/16"	1 1/2"	7/8"	7/8"	Lead	850	1,100	4,000 psi Concrete	Block, Brick, Concrete	5	000000000	0000
5/8"-11	1 7/8"	2"	1 1/8"	1 1/8"	Lead	970	1,500	4,000 psi Concrete	Block, Brick, Concrete	1	000000000	0000
3/4"-10	2"	2 1/2"	1 1/4"	1 1/4"	Lead	1,400	1,900	4,000 psi Concrete	Block, Brick, Concrete	1	000000000	0000

Installation Tools

Drive these tools with a hammer to expand anchors.

Zinc-Plated Steel
For Thread Size	Lg.		Each
8-32	2 15/16"	000000000	00000
10-24	3 1/4"	000000000	0000
1/4"-20	3 3/4"	000000000	0000
5/16"-18	4 3/8"	000000000	0000
3/8"-16	4 5/8"	000000000	0000
1/2"-13	5"	000000000	0000
5/8"-11	6 1/2"	000000000	00000
3/4"-10	6 1/2"	000000000	00000

Adjustable-Depth Installation Tools

An adjustable stop allows you to set anchors at consistent depths. Use with a hammer.

	Lg.
For Thread Size	Open	Closed		Each
Alloy Steel
1/4"-20	2 1/4"	2"	000000000	000000
3/8"-16	2 3/4"	2 1/4"	000000000	000000

Quickset Installation Tools

The fastest way to install shallow-hole female-threaded anchors. To use, insert the tip of the tool into the anchor and turn the tool with a power drill.

Zinc-Plated Steel
For Thread Size		Each
10-24	000000000	000000
1/4"-20	000000000	00000
3/8"-16	000000000	00000

Installation Tools for Shallow-Hole Female-Threaded Anchors

Drive these tools with a hammer to expand anchors.

Zinc-Plated Steel
For Thread Size	Lg.		Each
8-32	2 15/16"	000000000	00000
10-24	3 1/4"	000000000	0000
1/4"-20	3 3/4"	000000000	0000
5/16"-18	4 3/8"	000000000	0000
3/8"-16	4 5/8"	000000000	0000
1/2"-13	5"	000000000	0000
5/8"-11	6 1/2"	000000000	00000
3/4"-10	6 1/2"	000000000	00000

Quickset Installation Tools for Shallow-Hole Female-Threaded Anchors

The fastest way to install shallow-hole female-threaded anchors. To use, insert the tip of the tool into the anchor and turn the tool with a power drill.

Zinc-Plated Steel
For Thread Size		Each
10-24	000000000	000000
1/4"-20	000000000	00000
3/8"-16	000000000	00000

Adjustable-Depth Installation Tools for Shallow-Hole Female-Threaded Anchors

An adjustable stop allows you to set anchors at consistent depths. Use with a hammer.

	Lg.
For Thread Size	Open	Closed		Each
Alloy Steel
1/4"-20	2 1/4"	2"	000000000	000000
3/8"-16	2 3/4"	2 1/4"	000000000	000000

Vibration-Resistant Female-Threaded Anchors for Block and Brick

Often referred to as four-way expansion anchors, these expand in four directions to resist loosening from vibration. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

					Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Pull-Out	Shear	Tested In	For Use In	Pkg. Qty.		Pkg.
Zinc Alloy
1/4"-20	1 1/4"	1/2"	1 1/4"	1/2"	570	520	4,000 psi Concrete	Block, Brick, Concrete, Stone	10	000000000	000000
5/16"-18	1 1/2"	9/16"	1 1/2"	9/16"	650	820	4,000 psi Concrete	Block, Brick, Concrete, Stone	10	000000000	00000
3/8"-16	1 3/4"	11/16"	1 3/4"	11/16"	900	950	4,000 psi Concrete	Block, Brick, Concrete, Stone	10	000000000	00000
1/2"-13	2 1/4"	7/8"	2 1/4"	7/8"	1,200	2,000	4,000 psi Concrete	Block, Brick, Concrete, Stone	4	000000000	00000
5/8"-11	2 5/8"	1 1/8"	2 5/8"	1 1/8"	1,400	3,500	4,000 psi Concrete	Block, Brick, Concrete, Stone	1	000000000	0000
3/4"-10	3 1/8"	1 1/4"	3 1/8"	1 1/4"	2,400	3,800	4,000 psi Concrete	Block, Brick, Concrete, Stone	1	000000000	0000

Female-Threaded Anchors for Block and Brick

Also known as double expansion anchors, these expand from both sides for full contact and a secure hold. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. For maximum expansion, the anchor should protrude slightly above the surface before threading the screw. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

					Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Dia.	Pull-Out	Shear	Tested In	For Use In	Pkg. Qty.		Pkg.
Zinc Alloy
1/4"-20	1 3/8"	1/2"	1 1/4"	1/2"	220	270	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	000000
5/16"-18	1 5/8"	5/8"	1 1/2"	5/8"	370	500	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	00000
3/8"-16	2"	3/4"	1 3/4"	3/4"	500	750	4,000 psi Concrete	Block, Brick, Concrete	5	000000000	00000
1/2"-13	2 1/2"	7/8"	2 1/4"	7/8"	870	1,000	4,000 psi Concrete	Block, Brick, Concrete	1	000000000	0000
5/8"-11	2 3/4"	1"	2 1/2"	1"	1,500	2,500	4,000 psi Concrete	Block, Brick, Concrete	4	000000000	00000
3/4"-10	3 15/16"	1 1/4"	3 1/2"	1 1/4"	2,000	3,300	4,000 psi Concrete	Block, Brick, Concrete	1	000000000	0000

Wood-Screw-Threaded Metal Anchors for Block and Brick

Also known as lag shields, these anchors are designed to be used with large-diameter wood screws. They reinforce the hole and resist stripping. Each diameter is available in two lengths. The shorter length reduces drilling time; the longer length provides more strength. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a lag screw and tighten. Install flush or slightly below the surface. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

				Strength, lbs.
For Screw Size	Lg.	Min. Installation Dp.	Drill Bit Size	Pull-Out	Shear	Tested In	For Use In	Pkg. Qty.		Pkg.
Zinc Alloy
1/4"	1"	1"	1/2"	60	250	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	00000
1/4"	1 1/2"	1 1/2"	1/2"	75	250	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	0000
5/16"	1 1/4"	1 1/4"	1/2"	120	270	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	0000
5/16"	1 3/4"	1 3/4"	1/2"	130	270	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	0000
3/8"	1 3/4"	1 3/4"	5/8"	210	350	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	0000
3/8"	2 1/2"	2 1/2"	5/8"	250	350	4,000 psi Concrete	Block, Brick, Concrete	10	000000000	00000
1/2"	2"	2"	3/4"	270	400	4,000 psi Concrete	Block, Brick, Concrete	5	000000000	0000
1/2"	3"	3"	3/4"	520	400	4,000 psi Concrete	Block, Brick, Concrete	5	000000000	00000
5/8"	2"	2"	7/8"	300	550	4,000 psi Concrete	Block, Brick, Concrete	4	000000000	0000
5/8"	3 1/2"	3 1/2"	7/8"	650	550	4,000 psi Concrete	Block, Brick, Concrete	4	000000000	00000
3/4"	2"	2"	1"	370	600	4,000 psi Concrete	Block, Brick, Concrete	4	000000000	00000
3/4"	3 1/2"	3 1/2"	1"	700	600	4,000 psi Concrete	Block, Brick, Concrete	4	000000000	00000

Female-Threaded Expansion Anchors for Hollow Block and Brick

For narrow holes and small cavities where toggle anchors won't fit. To install, tap the anchor cone first into a drilled hole. Then, insert a screw or threaded rod and tighten. Pull-out strength and shear strength values are 25% of the ultimate values.

For technical drawings and 3-D models, click on a part number.

					Strength, lbs.
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Sleeve Material	Pull-Out	Shear	Tested In	Specifications Met	For Use In	Pkg. Qty.		Pkg.
Steel
1/4"-20	7/8"	3/8"	3/4"	304 Stainless Steel	260	300	4,000 psi Concrete	__	Concrete, Hollow Block, Hollow Brick	1	000000000	00000
1/4"-20	7/8"	3/8"	3/4"	Zinc Alloy	270	300	4,000 psi Concrete	__	Concrete, Hollow Block, Hollow Brick	5	000000000	0000
5/16"-18	1 5/16"	5/8"	1"	Zinc Alloy	400	470	4,000 psi Concrete	__	Concrete, Hollow Block, Hollow Brick	5	000000000	00000
3/8"-16	1 5/16"	5/8"	1"	304 Stainless Steel	450	620	4,000 psi Concrete	__	Concrete, Hollow Block, Hollow Brick	1	000000000	0000
3/8"-16	1 5/16"	5/8"	1"	Zinc Alloy	500	620	4,000 psi Concrete	FM Approved, UL Listed	Concrete, Hollow Block, Hollow Brick	5	000000000	00000
1/2"-13	1 3/4"	3/4"	1 1/2"	Zinc Alloy	1,000	1,000	4,000 psi Concrete	FM Approved, UL Listed	Concrete, Hollow Block, Hollow Brick	1	000000000	0000
5/8"-11	2"	1"	2 1/4"	Zinc Alloy	2,300	1,600	4,000 psi Concrete	FM Approved, UL Listed	Concrete, Hollow Block, Hollow Brick	1	000000000	0000