1/2"-13 Lags | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thread Size Thread Size	Show

1/2"-13

	Thread Size Thread Size	Hide

	Length Length

	For Use In For Use In

	Material Material

Stainless Steel

Steel

Zinc

	Screw Size Screw Size

1/2"

	Anchor Type Anchor Type

	Female Threaded

	Thread Length Thread Length

1 1/2"

2 1/2"

	Minimum Installation Depth Minimum Installation Depth

1 1/2"

2 1/4"

	Pull-Out Strength Pull-Out Strength

500 to 999 lbs.

1,000 to 1,999 lbs.

	Threading Threading

	Threaded on Both Ends

	Drill Bit Size Drill Bit Size

3/4"

7/8"

	Finish Finish

Zinc Plated

	Shear Strength Shear Strength

1,000 to 1,999 lbs.

2,000 lbs. or greater

	Diameter Diameter

7/8"

	Thread Fit Thread Fit

Class 1A

Class 2B

	Thread Type Thread Type

UNC

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

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Drill Bit Decimal Size Equivalent Drill Bit Decimal Size Equivalent

0.75"

0.875"

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Hardness Hardness

Not Rated

	Sleeve Material Sleeve Material

Zinc

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11 Products

About Threaded Studs and Rods

These studs are also known as hanger bolts—use them to hang, mount, and fasten parts to wood structures. Install with a stud driver or create wrench flats by threading two nuts onto the stud and jamming them together.

Zinc-plated steel studs resist corrosion in wet environments.

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

(A)		(B)
Screw Size	Thread Lg.	Thread Size	Thread Lg.	Lg.	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
Zinc-Plated Steel
1/2"	3"	1/2"-13	2 1/2"	6"	Not Rated	Not Rated	1	000000000	00000
1/2"	3"	1/2"-13	2 1/2"	12"	Not Rated	Not Rated	1	000000000	0000

Stainless Steel Wood Screw Threaded Studs

18-8 stainless steel studs have good chemical resistance and may be mildly magnetic. Also known as hanger bolts, use them to hang, mount, and fasten parts to wood structures. Install with a stud driver or create wrench flats by threading two nuts onto the stud and jamming them together.

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

(A)		(B)
Screw Size	Thread Lg.	Thread Size	Thread Lg.	Lg.	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
18-8 Stainless Steel
1/2"	2"	1/2"-13	1"	3"	Not Rated	Not Rated	1	000000000	00000
1/2"	2"	1/2"-13	1 1/2"	3 1/2"	Not Rated	Not Rated	1	000000000	0000
1/2"	2"	1/2"-13	2"	4"	Not Rated	Not Rated	1	000000000	0000
1/2"	3"	1/2"-13	2"	5"	Not Rated	Not Rated	1	000000000	0000
1/2"	3"	1/2"-13	2 1/2"	6"	Not Rated	Not Rated	1	000000000	0000
1/2"	3"	1/2"-13	2 1/2"	8"	Not Rated	Not Rated	1	000000000	0000

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
1/2"-13	2 1/4"	7/8"	2 1/4"	7/8"	1,200	2,000	3,000 psi Concrete	Block, Brick, Concrete, Stone	4	000000000	000000

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
1/2"-13	2 1/2"	7/8"	2 1/4"	7/8"	870	1,000	4,000 psi Concrete	Block, Brick, Concrete	1	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
1/2"-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	00000