ASME Lag Screws | McMaster-Carr

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Specifications Met

ASME Standard

ASME B18.2.1

System of Measurement

Screw Size

Length

Finish

Hot-Dipped Galvanized

Zinc Plated

Zinc Yellow-Chromate Plated

Fastener Head Type

Material

Threading

Head Width

Head Height

Approximate Threads per Inch

Thread Length

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

RoHS

Performance

Tensile Strength

Hardness

Eye Diameter

359 Products

Steel Hex Head Wood Screws

Often used on posts and beams, the coarse threads on these screws dig in for a firm hold. The hex head's six contact points keep sockets in place to avoid slipping and stripping the drive. To tighten, use a wrench or six-point hex socket. Also known as lag bolts.

Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from under the head.

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

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

Black-Zinc-Plated Steel—The dark zinc plating withstands occasional exposure to moisture while creating a finished look.

Hot-Dipped Galvanized Steel—Combines the strength of steel with the corrosion resistance of stainless steel. These screws are an economical alternative to 18-8 stainless steel in wet and outdoor environments. You can use them with chemically treated wood, such as ACQ-treated (arsenic-free) lumber, but they won't hold up to salt water.

	Lg.	Head Ht.	Approx. Threads per In.	Threading	Tapping Method	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel







				1/4"

				1"	0.172"	10	Fully Threaded	Thread Forming	ASME B18.2.1	25	000000000	000000


				1 1/4"	0.172"	10	Fully Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				1 3/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
				3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
				3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
				5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000


				5 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




						5/16"

						1"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


						1 1/4"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						1 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						1 3/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						2 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						3"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						3 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
						4 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
						5"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


						5 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
						6"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




								3/8"

								1"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


								1 1/4"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								1 3/4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								2 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								3"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
3 1/2"								0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
4"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
4 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
5"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


5 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	0000
6"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	0000




		1/2"

		1 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000


		2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
		2 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		3"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		3 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		4 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		5"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		5 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		6"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		8"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


		10"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000




				5/8"

				2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


				2 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				3"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				4"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				4 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				5"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				5 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				6"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000




								3/4"

						2 1/2"		0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


						3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
						3 1/2"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


						Zinc-Plated Steel







										1/4"

1"										0.172"	10	Fully Threaded	Thread Forming	ASME B18.2.1	100	000000000	0000


1 1/4"	0.172"									10	Fully Threaded	Thread Forming	ASME B18.2.1	100	000000000	0000
1 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
1 3/4"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
2 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
3"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
3 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
4"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
5"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
6"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000




										5/16"

										1"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000


										1 1/4"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
		1 1/2"								0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000
		1 3/4"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
		2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
		2 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
		3"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
		3 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
		4"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
		5"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
		6"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000




										3/8"

										1"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000


				1 1/4"	0.25"					7	Fully Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				1 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				1 3/4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				2 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	0000
				3"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				3 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				4 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				5"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000


				6"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				7"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
				8"	0.25"	7				Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000




						1/2"

						1 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000


						2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
						2 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						3"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						3 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						4"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						4 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						5"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						6"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						7"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						8"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000




5/8"

3"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000


4"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
5"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
7"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




								3/4"

								3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000


								4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
								5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	00000
								6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


		Black-Zinc-Plated Steel







										1/4"

										1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	100	000000000	00000


										1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
										2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
										2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
										3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000




												5/16"

				1 1/2"								0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000


				2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				2 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	00000
				3"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000




												3/8"

												1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000


												2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
												2 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
												3"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
												4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


						Hot-Dipped Galvanized Steel







1/4"

1"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	000000000	00000


1 1/4"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	000000000	00000
1 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	000000000	00000
2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	000000000	00000
2 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
3"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
3 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
4"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
4 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000
5"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000
5 1/2"	0.172"	10												Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000


6"	0.172"	10	Partially Threaded											Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000




		5/16"

		1"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000


		1 1/4"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
		1 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
		2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
		2 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
		3"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000
		3 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000
		4"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000
		4 1/2"	0.219"					9	Partially Threaded	Thread Forming				ASME B18.2.1, ASTM A307, SAE J429	25	000000000	00000
		5"	0.219"					9	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000
		6"	0.219"					9	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000




								3/8"

								1"	0.25"	7	Partially Threaded			Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	000000000	00000


				1 1/4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	000000000	00000
				1 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	000000000	00000
				1 3/4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	000000000	00000
				2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	000000000	00000
				2 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000
				3"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000
				3 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000
				4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	000000000	00000
				4 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	000000000	00000
				5"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	000000000	00000


				5 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	000000000	00000
				6"	0.25"	7		Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10			000000000	00000
				7"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000			00000
				8"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000			00000
				9"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000			00000
				10"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000			00000
				12"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000			00000




						1/2"

						2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	0000


						2 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						3"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						3 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						4"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						4 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						5"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	000000000	00000
						5 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						6"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						7"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						8"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000


9"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
10"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
12"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000




						5/8"

						2 1/2"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000


						3"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						4"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						4 1/2"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						5"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	000000000	00000
						6"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
		7"				0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
		8"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
		10"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
		12"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	00000
		16"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	00000




						3/4"

						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000


						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
						7"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	0000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	00000
						10"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	000000000	00000

Stainless Steel Hex Head Wood Screws

With coarse threads that dig in, these screws secure posts and beams in outdoor and wet environments. They won't degrade from moisture or chemically treated wood, such as ACQ-treated (arsenic-free) lumber. The hex head's six contact points keep sockets in place to avoid slipping and stripping on the drive. To tighten, use a wrench or six-point hex socket. Also known as lag bolts.

Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws 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 screws won't degrade when exposed to harsh weather, salt water, and most chemicals.

	Lg.	Head Ht.	Approx. Threads per In.	Threading	Tapping Method	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				1/4"

				1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	000000000	000000


				1 1/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	0000
				1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				1 3/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
				3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


				5 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
				6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
				8"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				10"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000




						5/16"

						1"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	0000


						1 1/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
						1 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	00000
						1 3/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						2 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						3"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						3 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
						4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						4 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
						5"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000


						5 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						6"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
						8"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						10"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000




								3/8"

								1"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


								1 1/4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
1 3/4"								0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
2 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
3"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	00000
3 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
4"	0.25"	7						Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
4 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	000000000	00000
5"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	000000000	00000


5 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	000000000	00000
6"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	000000000	00000
7"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	00000
8"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	00000
10"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	0000
12"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	000000000	00000




		1/2"

		1 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000


		1 3/4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
		2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
		2 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
		3"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
		3 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		4 1/2"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
		5"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
		5 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
		6"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000


		7"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000
		8"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000
		10"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
		12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000




				5/8"

				2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


				2 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				3"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				3 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				4"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				5"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				6"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				7"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				8"	0.422"	5		Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				10"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
				12"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


				16"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000




						3/4"

						3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						7"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						10"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


						316 Stainless Steel







								1/4"

								1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	000000000	0000


								1 1/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
								3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
								6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




			5/16"

			1"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000


			1 1/4"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
			1 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
			2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
			2 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
			3"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
			3 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
			4"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
			4 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
			5"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
			6"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




										3/8"

										1"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000


				1 1/4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				1 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	000000000	0000
				2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				2 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				3"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	000000000	0000
				3 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				4 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				5"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				6"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


				7"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
				8"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000
10"				0.25"	7					Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000




				1/2"

				1 1/2"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	0000


				2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				2 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				3"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				3 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				4"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				4 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				5"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				6"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	0000
				7"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000
				8"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000


				10"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000
				12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	000000000	00000




					5/8"

					2 1/2"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000


					3"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					4"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					5"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					6"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					7"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					8"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000
					10"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	000000000	00000




						3/4"

						4"	0.5"	4 1/2		Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000


						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	000000000	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	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-Yellow-Chromate-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.

	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-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	000000	0000000	000000


		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