12" Wood Screws | McMaster-Carr

Filter by

System of Measurement

Inch

Screw Size

Finish

Hot-Dipped Galvanized

Material

Fastener Head Type

Threading

Threaded on Both Ends

Thread Size

Thread Length

Tip Type

Head Width

Approximate Threads per Inch

4 1/2

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

Yes

DFARS Specialty Metals

Exempt

Not Compliant

Export Control Classification Number (ECCN)

REACH

RoHS

Head Height

Drive Style

For Use In

Specifications Met

Tapping Method

Performance

Thread Type

Tensile Strength

Thread Fit

Unified Standard Class 1A

Forward

How can we improve?

14 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.

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.

	Threading	Tapping Method	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel







	1/2"

	12"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	1	95452A151	000000


	Hot-Dipped Galvanized Steel







					3/8"

					12"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	5	94048A415	00000




							1/2"

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




									5/8"

									12"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A402	00000




											3/4"

											12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1, ASTM A307, SAE J429	1	94048A450	00000

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.

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

	(A)		(B)
	Screw Size	Thread Lg.	Thread Size	Thread Lg.	Lg.	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		3/8"	3"	3/8"-16	2 1/2"	12"	Not Rated	Not Rated	1	90207A658	00000


		1/2"	3"	1/2"-13	2 1/2"	12"	Not Rated	Not Rated	1	90207A748	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.

	Threading	Tapping Method	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	3/8"

	12"	0.25"	7	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A121	000000




			1/2"

			12"	0.344"	6	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A757	0000




					5/8"

					12"	0.422"	5	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A857	00000




							3/4"

							12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	92351A951	00000


							316 Stainless Steel







											1/2"

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




													3/4"

													12"	0.5"	4 1/2	Partially Threaded	Thread Forming	ASME B18.2.1	1	90123A681	00000

Hot Glue Sticks

When heated, these glue sticks melt and quickly begin to harden. Use them to seal packaging and form other low- to medium-strength bonds. 3M glue sticks work only with 3M glue guns.

Adhesives that take longer to harden are suited for applications that require some repositioning, because the longer open times allow for more adjustment. For high-volume applications, adhesives with a lower viscosity flow faster than other hot-melt adhesives.

3M Scotch-Weld

Image of Product. Front orientation. Hot Glue. Hot Glue Sticks.

Model Number 3750LM—3750LM is FDA compliant 21 CFR 175.105 for use in food packaging. It is a low-temperature formulation, which works well on delicate or heat-sensitive materials.

Mfr. Model No.	For 3M Gun Model No.	Dia.	Lg.	Begins to Harden, sec.	Reaches Full Strength, hr.	Application Temp. Range, ° F	Consistency	Viscosity, cP	Elongation	Color	Food Industry Std.	For Joining	Approx. No. of Sticks per lb.		1 lb.	11 lb.
3750LM	AE II LT	1/2"	12"	25	24	250 to 270	Thick Liquid	4,000	400%	Beige	FDA Compliant 21 CFR 175.105	Wood	14	7333A33	000000	0000000