SAE Wood Screws | McMaster-Carr

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Screw Size

Finish

Hot-Dipped Galvanized

Fastener Head Type

Hex

Threading

Partially Threaded

Material

Steel

Specifications Met

ANSI/HPVA HP-1 Type I

ASME B18.2.1

ASTM Standard

DIN Standard

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Head Width

Head Height

For Use In

Approximate Threads per Inch

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Thread Length

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REACH

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Compliant

Performance

Corrosion Resistant

Export Control Classification Number (ECCN)

EAR99

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73 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.

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.
Hot-Dipped Galvanized Steel







				1/4"

				1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	000000000	000000


				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