Lag Studs | McMaster-Carr

Filter by

System of Measurement

Thread Size

Length

Screw Size

Material

Thread Length

Threading

Threaded on Both Ends

Finish

Black Oxide

Zinc Plated

Zinc Yellow-Chromate Plated

Thread Type

Hardness

DFARS Specialty Metals

Tensile Strength

RoHS

REACH

Thread Fit

Unified Standard Class 1A

Unified Standard Class 2A

Export Control Classification Number (ECCN)

Tip Type

Thread Pitch

For Use In

Head Height

Head Width

Specifications Met

Approximate Threads per Inch

Eye Diameter

106 Products

Thread-Mount Studs for Wood

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

Black-Oxide Steel—Typically chosen for their appearance, these studs have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Zinc-Plated Steel—The most common choice for areas with occasional exposure to moisture.

18-8 Stainless Steel—The choice for wet and outdoor environments, these studs resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

316 Stainless Steel—Superior to 18-8 stainless steel, these studs won't degrade when exposed to harsh weather, salt water, and most chemicals.

	(A)		(B)
	Screw Size	Thread Lg.	Thread Size	Thread Lg.	Lg.	Tensile Strength, psi	Hardness	Pkg. Qty.		Pkg.
Black-Oxide Steel



		No. 8	7/8"	8-32	5/8"	1 1/2"	Not Rated	Not Rated	50	000000000	000000


		No. 8	1"	8-32	3/4"	1 3/4"	Not Rated	Not Rated	25	000000000	00000
		No. 8	1"	8-32	1"	2"	Not Rated	Not Rated	25	000000000	00000
		No. 10	7/8"	10-24	5/8"	1 1/2"	Not Rated	Not Rated	25	000000000	00000
		No. 10	1"	10-24	1"	2"	Not Rated	Not Rated	25	000000000	00000
		No. 10	1 1/2"	10-24	1"	2 1/2"	Not Rated	Not Rated	25	000000000	00000
		No. 10	1 1/2"	10-24	1 1/2"	3"	Not Rated	Not Rated	10	000000000	0000
		1/4"	1"	1/4"-20	1"	2"	Not Rated	Not Rated	10	000000000	0000
		1/4"	1 1/2"	1/4"-20	1"	2 1/2"	Not Rated	Not Rated	10	000000000	0000
		1/4"	1 1/2"	1/4"-20	1 1/2"	3"	Not Rated	Not Rated	10	000000000	00000
		5/16"	1 1/2"	5/16"-18	1"	2 1/2"	Not Rated	Not Rated	10	000000000	00000


		5/16"	1 1/2"	5/16"-18	1 1/2"	3"	Not Rated	Not Rated	5	000000000	0000
		5/16"	2"	5/16"-18	1 1/2"	3 1/2"	Not Rated	Not Rated	5	000000000	0000
		3/8"	1 1/2"	3/8"-16	1 1/2"	3"	Not Rated	Not Rated	5	000000000	0000
		3/8"	2"	3/8"-16	1 1/2"	3 1/2"	Not Rated	Not Rated	5	000000000	00000
		3/8"	2"	3/8"-16	2"	4"	Not Rated	Not Rated	5	000000000	00000
		3/8"	3"	3/8"-16	1 3/8"	5"	Not Rated	Not Rated	5	000000000	00000
		3/8"	3"	3/8"-16	1 1/2"	6"	Not Rated	Not Rated	5	000000000	00000
		3/8"	3"	3/8"-16	2 1/2"	10"	Not Rated	Not Rated	1	000000000	00000


		Zinc-Plated Steel



				No. 8	7/8"	8-32	5/8"	1 1/2"	Not Rated	Not Rated	100	000000000	0000


				No. 8	1"	8-32	3/4"	1 3/4"	Not Rated	Not Rated	100	000000000	0000
				No. 8	1"	8-32	1"	2"	Not Rated	Not Rated	100	000000000	00000
				No. 10	7/8"	10-24	5/8"	1 1/2"	Not Rated	Not Rated	100	000000000	00000
				No. 10	1"	10-24	1"	2"	Not Rated	Not Rated	50	000000000	00000
				No. 10	1 1/2"	10-24	1"	2 1/2"	Not Rated	Not Rated	50	000000000	00000
				No. 10	1 1/2"	10-24	1 1/2"	3"	Not Rated	Not Rated	50	000000000	00000
				1/4"	1"	1/4"-20	1"	2"	Not Rated	Not Rated	50	000000000	00000
				1/4"	1 1/2"	1/4"-20	1"	2 1/2"	Not Rated	Not Rated	50	000000000	00000
				1/4"	1 1/2"	1/4"-20	1 1/2"	3"	Not Rated	Not Rated	25	000000000	00000
				5/16"	1 1/2"	5/16"-18	1"	2 1/2"	Not Rated	Not Rated	25	000000000	00000


				5/16"	1 1/2"	5/16"-18	1 1/2"	3"	Not Rated	Not Rated	25	000000000	00000
				5/16"	2"	5/16"-18	1 1/2"	3 1/2"	Not Rated	Not Rated	25	000000000	00000
				3/8"	1 1/2"	3/8"-16	1 1/2"	3"	Not Rated	Not Rated	25	000000000	00000
				3/8"	2"	3/8"-16	1 1/2"	3 1/2"	Not Rated	Not Rated	10	000000000	00000
				3/8"	2"	3/8"-16	2"	4"	Not Rated	Not Rated	10	000000000	00000
				3/8"	3"	3/8"-16	1 3/8"	5"	Not Rated	Not Rated	10	000000000	00000
				3/8"	3"	3/8"-16	1 1/2"	6"	Not Rated	Not Rated	10	000000000	00000
				3/8"	3"	3/8"-16	2 1/2"	10"	Not Rated	Not Rated	1	000000000	0000
				3/8"	3"	3/8"-16	2 1/2"	12"	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"	12"	Not Rated	Not Rated	1	000000000	0000


				18-8 Stainless Steel



	No. 10				5/8"	10-24	3/8"	1"	Not Rated	Not Rated	25	000000000	00000


	No. 10				7/8"	10-24	5/8"	1 1/2"	Not Rated	Not Rated	25	000000000	00000
	No. 10				1"	10-24	1"	2"	Not Rated	Not Rated	25	000000000	00000
	No. 10				1 1/2"	10-24	1"	2 1/2"	Not Rated	Not Rated	10	000000000	0000
	No. 10				1 1/2"	10-24	1 1/2"	3"	Not Rated	Not Rated	10	000000000	0000
	1/4"				7/8"	1/4"-20	5/8"	1 1/2"	Not Rated	Not Rated	10	000000000	0000
	1/4"				1"	1/4"-20	1"	2"	Not Rated	Not Rated	10	000000000	0000
	1/4"				1 1/2"	1/4"-20	1"	2 1/2"	Not Rated	Not Rated	10	000000000	00000
	1/4"				1 1/2"	1/4"-20	1 1/2"	3"	Not Rated	Not Rated	10	000000000	00000
	1/4"				2"	1/4"-20	1 1/2"	3 1/2"	Not Rated	Not Rated	10	000000000	00000
	1/4"				2"	1/4"-20	2"	4"	Not Rated	Not Rated	10	000000000	00000


	1/4"				3"	1/4"-20	1 3/8"	5"	Not Rated	Not Rated	5	000000000	00000
	1/4"				3"	1/4"-20	1 1/2"	4 1/2"	Not Rated	Not Rated	10	000000000	00000
	1/4"				3"	1/4"-20	1 1/2"	6"	Not Rated	Not Rated	5	000000000	00000
	1/4"				3"	1/4"-20	2 1/2"	8"	Not Rated	Not Rated	5	000000000	00000
	5/16"				7/8"	5/16"-18	5/8"	1 1/2"	Not Rated	Not Rated	10	000000000	00000
	5/16"				1"	5/16"-18	1"	2"	Not Rated	Not Rated	10	000000000	00000
	5/16"				1 1/2"	5/16"-18	1"	2 1/2"	Not Rated	Not Rated	10	000000000	00000
	5/16"				1 1/2"	5/16"-18	1 1/2"	3"	Not Rated	Not Rated	10	000000000	00000
	5/16"				2"	5/16"-18	1 1/2"	3 1/2"	Not Rated	Not Rated	10	000000000	00000
	5/16"				2"	5/16"-18	2"	4"	Not Rated	Not Rated	5	000000000	00000


	5/16"	3"			5/16"-18	1 1/4"	5"	Not Rated	Not Rated	5	000000000	00000
	5/16"	3"	5/16"-18		1 1/2"	6"	Not Rated	Not Rated	5	000000000	00000
	3/8"	1 1/2"	3/8"-16		1 1/2"	3"	Not Rated	Not Rated	5	000000000	00000
	3/8"	2"	3/8"-16		1 1/2"	3 1/2"	Not Rated	Not Rated	5	000000000	00000
	3/8"	2"	3/8"-16		2"	4"	Not Rated	Not Rated	5	000000000	00000
	3/8"	3"	3/8"-16		1 3/8"	5"	Not Rated	Not Rated	1	000000000	0000
	3/8"	3"	3/8"-16		1 1/2"	6"	Not Rated	Not Rated	1	000000000	0000
	3/8"	3"	3/8"-16		2 1/2"	8"	Not Rated	Not Rated	1	000000000	0000
	1/2"	2"	1/2"-13		1"	3"	Not Rated	Not Rated	1	000000000	0000
	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	00000


	316 Stainless Steel



			M5		27 mm	M5 × 0.8 mm	20 mm	50 mm	Not Rated	Not Rated	1	000000000	0000


			M6		37 mm	M6 × 1 mm	30 mm	70 mm	Not Rated	Not Rated	1	000000000	0000
			M8		57 mm	M8 × 1.25 mm	40 mm	100 mm	Not Rated	Not Rated	1	000000000	0000
			M10		40 mm	M10 × 1.5 mm	20 mm	60 mm	100,000	Rockwell C25	1	000000000	0000
			M10		60 mm	M10 × 1.5 mm	20 mm	80 mm	100,000	Rockwell C25	1	000000000	0000
			M10		70 mm	M10 × 1.5 mm	30 mm	100 mm	100,000	Rockwell C25	1	000000000	0000

Hex-Drive Thread-Mount Studs for Wood

Turn these studs with a hex key to install more quickly than other studs for wood. Use them to suspend electrical wiring and to hang, mount, and fasten parts to wood structures. Also known as hanger bolts.

Stainless Steel—The choice for wet and outdoor environments, these studs resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

	(A)		(B)
	Screw Size	Thread Lg.	Thread Size	Thread Lg.	Lg.	Drive Size	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
Stainless Steel



		No. 8	1 3/16"	5/16"-18	5/16"	1 1/2"	5/32"	Not Rated	Not Rated	1	000000000	00000

Dowel Screws

Use these to join two pieces of wood.

	Hardness	Pkg. Qty.		Pkg.
Steel







	3/16" Screw Size

	1 1/2"	3/4"	Not Rated	Rockwell B80	50	000000000	000000


	2"	7/8"	Not Rated	Rockwell B80	50	000000000	00000




			1/4" Screw Size

			1 1/2"	3/4"	Not Rated	Rockwell B80	50	000000000	00000


			2"	7/8"	Not Rated	Rockwell B80	50	000000000	00000
			2 1/2"	1 1/8"	Not Rated	Rockwell B80	50	000000000	00000
			3"	1 3/8"	Not Rated	Rockwell B80	50	000000000	00000
			3 1/2"	1 5/8"	Not Rated	Rockwell B80	25	000000000	00000




					5/16" Screw Size

					2 1/2"	1 1/8"	Not Rated	Rockwell B80	25	000000000	00000


					3"	1 3/8"	Not Rated	Rockwell B80	25	000000000	00000
					4"	1 5/8"	Not Rated	Rockwell B80	25	000000000	00000




							3/8" Screw Size

							2 1/2"	1 1/8"	Not Rated	Rockwell B80	10	000000000	0000


							3"	1 3/8"	Not Rated	Rockwell B80	10	000000000	0000
							4"	1 5/8"	Not Rated	Rockwell B80	10	000000000	00000

Wood Screw-Style Hangers

Drive these hangers into wood with an adjustable wrench, pliers, or a special driver bit (sold separately). They’re also known as eye lags.

Zinc-Plated Steel—Zinc- and zinc yellow-chromate plated steel hangers are corrosion resistant in wet environments. The zinc yellow-chromate plated steel hangers meet quality standards outlined in ASTM B633 and dimensional standards outlined in ASME B18.2.1.

316 Stainless Steel—316 stainless steel hangers have excellent resistance to chemicals and salt water. They’re best for corrosive and marine environments.

	Hanger Bolts														Driver Bits
						Head
	Screw Size	Lg.	Threading	Thread Lg.	Eye Dia.	Wd.	Thk.	Ht.	Max. Wt. Cap.	For Use In	Specs. Met	Pkg. Qty.		Pkg.		Each
Zinc-Plated Steel



		1/4"	6"	Partially Threaded	1 1/2"	3/16"	13/32"	3/32"	23/32"	Not Rated	Wood	—	25	000000000	000000	0000000	000000


		Zinc-Yellow-Chromate-Plated Steel



				1/4"	3"	Partially Threaded	1 1/2"	3/16"	13/32"	3/32"	23/32"	Not Rated	Wood	ASME B18.2.1, ASTM B633	50	000000000	00000	0000000	00000


				1/4"	4"	Partially Threaded	1 1/2"	3/16"	13/32"	3/32"	23/32"	Not Rated	Wood	ASME B18.2.1, ASTM B633	25	000000000	00000	0000000	00000
				1/4"	5"	Partially Threaded	1 1/2"	3/16"	13/32"	3/32"	23/32"	Not Rated	Wood	ASME B18.2.1, ASTM B633	25	000000000	00000	0000000	00000
				5/16"	3 1/2"	Partially Threaded	1 3/4"	1/4"	7/16"	3/32"	9/16"	Not Rated	Wood	ASME B18.2.1, ASTM B633	25	000000000	00000	0000000	00000


				316 Stainless Steel



						1/4"	3"	Partially Threaded	1 1/2"	3/16"	13/32"	3/32"	23/32"	Not Rated	Wood	—	25	000000000	00000	0000000	00000

Drilling Screw-Style Hangers

Drill holes with the point on these hangers. Install with a special driver bit (sold separately).

Zinc-Yellow-Chromate-Plated Steel—Zinc-yellow-chromate-plated hangers are corrosion resistant in wet environments.

7/16" Wide Head—Some hangers with a _7/16" head width can drill through steel as thick as 12 ga.; others can drill through sheet metal and wood.

	Hanger Bolts												Driver Bits
							Head
	Screw Size	Max. Drilling Thk.	Lg.	Threading	Thread Lg.	Eye Dia.	Thk.	Ht.	For Use In	Pkg. Qty.		Pkg.		Each
Zinc-Yellow-Chromate-Plated Steel







				7/16" Wide Head

				1/4"	0.038"	2 3/4"	Partially Threaded	1 1/2"	3/16"	3/32"	9/16"	Sheet Metal, Wood	25	000000000	000000	000000000	000000