Flat Head Lag Screws | McMaster-Carr

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Finish

Hot-Dipped Galvanized

Material

Threading

Head Width

Head Height

Thread Length

Specifications Met

Approximate Threads per Inch

4 1/2

DFARS Specialty Metals

Exempt

Not Compliant

REACH

Compliant

Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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Performance

353 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	95452A100	000000


				1 1/4"	0.172"	10	Fully Threaded	Thread Forming	ASME B18.2.1	10	95452A101	0000
				1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A102	0000
				1 3/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A103	0000
				2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A104	0000
				2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A105	00000
				3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A106	00000
				3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A107	0000
				4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A108	0000
				4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A109	00000
				5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A110	0000


				5 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A111	0000
				6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A112	0000




						5/16"

						1"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	10	95452A113	0000


						1 1/4"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	10	95452A114	0000
						1 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A115	0000
						1 3/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	95452A116	0000
						2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A117	0000
						2 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A118	0000
						3"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A119	0000
						3 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A120	0000
						4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A121	0000
						4 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A122	0000
						5"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A123	0000


						5 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A124	0000
						6"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A125	0000




								3/8"

								1"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	10	95452A126	0000


								1 1/4"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	10	95452A127	0000
								1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A128	0000
								1 3/4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A129	0000
								2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A130	0000
								2 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A131	0000
								3"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A132	0000
3 1/2"								0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A133	0000
4"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A134	0000
4 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A135	0000
5"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A136	0000


5 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	95452A137	00000
6"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	95452A138	0000




		1/2"

		1 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A139	00000


		2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	95452A140	00000
		2 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A141	0000
		3"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A142	0000
		3 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A143	0000
		4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A144	0000
		4 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A145	0000
		5"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A146	0000
		5 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A147	0000
		6"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A148	0000
		8"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A149	00000


		10"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A150	00000
		12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	95452A151	00000




				5/8"

				2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A152	0000


				2 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A153	0000
				3"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A154	0000
				4"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A155	0000
				4 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A156	0000
				5"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A157	00000
				5 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A158	00000
				6"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A159	00000




								3/4"

						2 1/2"		0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A163	00000


						3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A164	0000
						3 1/2"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A165	00000
						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A166	00000
						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A168	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A169	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A170	00000


						Zinc-Plated Steel







										1/4"

1"										0.172"	10	Fully Threaded	Thread Forming	ASME B18.2.1	100	91478A542	00000


1 1/4"	0.172"									10	Fully Threaded	Thread Forming	ASME B18.2.1	100	91478A544	00000
1 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	91478A546	00000
1 3/4"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	91478A548	00000
2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	91478A550	00000
2 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	100	91478A552	00000
3"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A554	00000
3 1/2"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A556	00000
4"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A558	00000
5"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A562	00000
6"	0.172"									10	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A566	00000




										5/16"

										1"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	100	91478A583	00000


										1 1/4"	0.219"	9	Fully Threaded	Thread Forming	ASME B18.2.1	100	91478A585	00000
		1 1/2"								0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	100	91478A587	00000
		1 3/4"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A588	00000
		2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A591	00000
		2 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A593	00000
		3"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A595	00000
		3 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A597	00000
		4"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A599	00000
		5"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A603	00000
		6"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A607	00000




										3/8"

										1"	0.25"	7	Fully Threaded	Thread Forming	ASME B18.2.1	50	91478A624	00000


				1 1/4"	0.25"					7	Fully Threaded	Thread Forming	ASME B18.2.1	50	91478A626	00000
				1 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A628	00000
				1 3/4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A630	00000
				2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	50	91478A632	00000
				2 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A634	00000
				3"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A636	00000
				3 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A638	00000
				4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A640	00000
				4 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A642	00000
				5"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A644	00000


				6"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A648	0000
				7"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A650	00000
				8"	0.25"	7				Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A652	0000




						1/2"

						1 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A712	00000


						2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	25	91478A720	00000
						2 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A722	0000
						3"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A724	00000
						3 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A726	00000
						4"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A728	0000
						4 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A730	00000
						5"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A732	00000
						6"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A736	00000
						7"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	10	91478A738	00000
						8"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A740	00000




5/8"

3"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A806	0000


4"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A810	00000
5"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A814	00000
7"	0.422"							5	Partially Threaded	Thread Forming	ASME B18.2.1	1	91478A820	0000




								3/4"

								3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A840	00000


								4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A842	00000
								5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	5	91478A843	00000
								6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	91478A844	0000


		Black-Zinc-Plated Steel







										1/4"

										1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	100	92371A412	00000


										1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A416	00000
										2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A420	00000
										2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A424	00000
										3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A428	00000




												5/16"

				1 1/2"								0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A521	00000


				2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A525	00000
				2 1/2"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	50	92371A529	00000
				3"	0.219"							9	Partially Threaded	Thread Forming	ASME B18.2.1	25	92371A533	00000




												3/8"

												1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	92371A571	00000


												2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	92371A574	00000
												2 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92371A578	0000
												3"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	25	92371A581	00000
												4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92371A585	0000


						Hot-Dipped Galvanized Steel







1/4"

1"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	94048A212	00000


1 1/4"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	94048A215	00000
1 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	94048A218	00000
2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	100	94048A221	00000
2 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A224	00000
3"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A227	00000
3 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A230	00000
4"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A233	00000
4 1/2"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A236	00000
5"	0.172"													10	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A239	00000
5 1/2"	0.172"	10												Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A411	00000


6"	0.172"	10	Partially Threaded											Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A245	00000




		5/16"

		1"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A248	00000


		1 1/4"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A251	00000
		1 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A254	00000
		2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A257	00000
		2 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A260	00000
		3"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A263	00000
		3 1/2"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A266	00000
		4"	0.219"					9	Partially Threaded					Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	25	94048A269	00000
		4 1/2"	0.219"					9	Partially Threaded	Thread Forming				ASME B18.2.1, ASTM A307, SAE J429	25	94048A274	00000
		5"	0.219"					9	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A275	00000
		6"	0.219"					9	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A278	00000




								3/8"

								1"	0.25"	7	Partially Threaded			Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	50	94048A412	00000


				1 1/4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	94048A281	00000
				1 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	94048A284	00000
				1 3/4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	94048A287	00000
				2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			50	94048A290	00000
				2 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A293	00000
				3"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A296	00000
				3 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A299	00000
				4"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			25	94048A302	00000
				4 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	94048A305	00000
				5"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	94048A308	00000


				5 1/2"	0.25"			7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429			10	94048A413	00000
				6"	0.25"	7		Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10			94048A314	00000
				7"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A317			00000
				8"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A320			00000
				9"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A414			00000
				10"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A324			00000
				12"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A415			00000




						1/2"

						2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A329	0000


						2 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A332	00000
						3"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A335	00000
						3 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A338	00000
						4"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A341	00000
						4 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A344	00000
						5"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	10	94048A347	00000
						5 1/2"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A416	00000
						6"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A353	00000
						7"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A356	00000
						8"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A359	00000


9"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A417	0000
10"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A363	0000
12"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A366	0000




						5/8"

						2 1/2"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A418	00000


						3"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A374	00000
						4"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A380	00000
						4 1/2"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A421	00000
						5"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A386	00000
						6"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A389	0000
		7"				0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A392	0000
		8"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A396	0000
		10"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A399	0000
		12"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A402	00000
		16"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A423	00000




						3/4"

						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A404	0000


						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A407	0000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A410	0000
						7"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A420	0000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A430	00000
						10"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A440	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A450	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	92351A542	000000


				1 1/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A544	0000
				1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A546	00000
				1 3/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A548	00000
				2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A550	00000
				2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A552	00000
				3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A554	0000
				3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A556	0000
				4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A558	0000
				4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A559	00000
				5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A562	00000


				5 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A111	00000
				6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A566	00000
				8"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A116	00000
				10"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A117	00000




						5/16"

						1"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A583	0000


						1 1/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A585	00000
						1 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	25	92351A587	00000
						1 3/4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A588	0000
						2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A591	0000
						2 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A593	0000
						3"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A595	0000
						3 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A597	0000
						4"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A599	00000
						4 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A601	00000
						5"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A603	0000


						5 1/2"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A112	0000
						6"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A607	0000
						8"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A118	00000
						10"	0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A119	00000




								3/8"

								1"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A624	0000


								1 1/4"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A626	0000
								1 1/2"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A628	0000
1 3/4"								0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A630	00000
2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A632	00000
2 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A634	00000
3"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	10	92351A636	00000
3 1/2"	0.25"							7	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A638	0000
4"	0.25"	7						Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A640	0000
4 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	92351A642	00000
5"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	92351A644	00000


5 1/2"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	92351A113	00000
6"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	5	92351A648	00000
7"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	92351A656	00000
8"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	92351A662	00000
10"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	92351A671	0000
12"	0.25"	7	Partially Threaded					Thread Forming	ASME B18.2.1	1	92351A121	00000




		1/2"

		1 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A712	0000


		1 3/4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A114	0000
		2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A720	0000
		2 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A722	0000
		3"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	5	92351A724	00000
		3 1/2"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A726	0000
		4"	0.344"					6	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A728	0000
		4 1/2"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A730	0000
		5"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A732	0000
		5 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A115	0000
		6"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A736	0000


		7"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A740	00000
		8"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A746	00000
		10"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A754	0000
		12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	92351A757	0000




				5/8"

				2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A122	0000


				2 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A801	00000
				3"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A807	00000
				3 1/2"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A123	0000
				4"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A819	00000
				5"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A825	00000
				6"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A831	00000
				7"	0.422"			5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A837	00000
				8"	0.422"	5		Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A843	00000
				10"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A849	00000
				12"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A857	00000


				16"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A127	00000




						3/4"

						3"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A896	00000


						4"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A903	00000
						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A911	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A919	00000
						7"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A927	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A935	00000
						10"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A943	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A951	00000


						316 Stainless Steel







								1/4"

								1"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	25	90123A113	0000


								1 1/4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A116	0000
								1 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A119	0000
								2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A124	0000
								2 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A127	0000
								3"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A131	0000
								3 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A139	0000
								4"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A146	0000
								4 1/2"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A154	0000
								5"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A161	0000
								6"	0.172"	10	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A172	0000




			5/16"

			1"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A206	0000


			1 1/4"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A211	0000
			1 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A227	0000
			2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A234	0000
			2 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A238	0000
			3"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A242	0000
			3 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A247	0000
			4"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A256	0000
			4 1/2"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A261	0000
			5"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A269	0000
			6"						0.219"	9	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A278	0000




										3/8"

										1"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A340	0000


				1 1/4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A345	0000
				1 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	10	90123A374	0000
				2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A377	0000
				2 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A379	0000
				3"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	5	90123A383	0000
				3 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A386	0000
				4"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A389	0000
				4 1/2"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A393	0000
				5"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A401	0000
				6"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A407	0000


				7"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A413	0000
				8"	0.25"					7	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A417	00000
10"				0.25"	7					Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A419	0000




				1/2"

				1 1/2"	0.344"	6				Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A421	0000


				2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A425	0000
				2 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A429	0000
				3"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A436	0000
				3 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A439	0000
				4"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A443	0000
				4 1/2"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A449	0000
				5"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A457	0000
				6"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A465	0000
				7"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A473	00000
				8"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A481	00000


				10"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A486	00000
				12"	0.344"	6	Partially Threaded			Thread Forming	ASME B18.2.1	1	90123A489	00000




					5/8"

					2 1/2"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A506	00000


					3"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A514	00000
					4"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A522	00000
					5"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A530	00000
					6"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A537	00000
					7"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A545	00000
					8"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A553	00000
					10"	0.422"	5	Partially Threaded		Thread Forming	ASME B18.2.1	1	90123A561	00000




						3/4"

						4"	0.5"	4 1/2		Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A634	00000


						5"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A642	00000
						6"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A650	00000
						8"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A665	00000
						12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A681	00000