1 5/8" Wood Screws | McMaster-Carr

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22 Products

Serrated Stainless Steel Square-Drive Flat Head Wood Screws

Lock in for a tighter hold than typical wood screws. Serrations beneath the flat head dig into wood to secure these screws into place. Made of stainless steel, they won't degrade from moisture or chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as a Robertson drive, the square drive handles more torque than slotted and Phillips drives, so it's less likely to slip.

The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of 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.

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Countersink Angle	Flat Head Profile	Approx. Threads per In.	Threading	Tapping Method	Tapping Screw Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				No. 6

				1 5/8"	0.279"	0.083"	32 Ga.	90°	Standard	9	Partially Threaded	Thread Cutting	17	25	000000000	00000




						No. 8

						1 5/8"	0.311"	0.088"	3/32"	90°	Standard	15	Partially Threaded	Thread Cutting	17	25	000000000	0000

Stainless Steel Square-Drive Flat Head Screws for Wood and Composite Wood

Fasten decking and fencing outdoors with screws that won't rust. They're often used with chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as deck screws, their trumpet shape spreads pressure to prevent splitting, while the flat head limits snags. The square drive handles more torque than slotted and Phillips drives.

The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of 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.

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Flat Head Profile	Approx. Threads per In.	Threading	Tapping Method	Tapping Screw Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				No. 6

				1 5/8"	0.344"	0.197"	1/16"	Standard	9	Partially Threaded	Thread Cutting	17	100	000000000	000000




						No. 7

						1 5/8"	0.23"	0.125"	1/16"	Narrow	10	Partially Threaded	Thread Cutting	17	50	000000000	00000




								No. 8

								1 5/8"	0.344"	0.192"	5/64"	Standard	8	Partially Threaded	Thread Cutting	17	50	000000000	00000




										No. 10

										1 5/8"	0.344"	0.189"	3/32"	Standard	13	Partially Threaded	Thread Cutting	17	50	000000000	00000


										316 Stainless Steel







														No. 6

														1 5/8"	0.344"	0.197"	1/16"	Standard	18	Partially Threaded	Thread Cutting	17	50	000000000	0000




																No. 7

																1 5/8"	0.23"	0.125"	1/16"	Narrow	16	Partially Threaded	Thread Cutting	17	50	000000000	00000




																		No. 8

																		1 5/8"	0.344"	0.192"	5/64"	Standard	15	Partially Threaded	Thread Cutting	17	50	000000000	00000




																				No. 10

1 5/8"																				0.344"	0.189"	3/32"	Standard	13	Partially Threaded	Thread Cutting	17	25	000000000	0000

Drywall Screws for Wood

Hang drywall to wood framing. These screws have a sharp point that penetrates drywall and a curved neck that sinks in without tearing the paper surface.

Zinc-Plated Steel—Zinc-plated steel screws are corrosion resistant in wet environments.

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

18-8 Stainless Steel—18-8 stainless steel screws resist chemicals and may be mildly magnetic.

Length—Length is measured from the top of the head.

		Head		Drive
	Lg.	Dia.	Ht.	Size	Style	Approx. Threads per In.	Threading	Min. Thread Lg.	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				No. 6 Screw Size

				1 5/8"	0.347"	0.031"	No. 2	Phillips	9	Fully Threaded	—	100	000000000	00000


				Zinc-Yellow-Chromate-Plated Steel







								No. 6 Screw Size

								1 5/8"	0.347"	0.031"	No. 2	Phillips	9	Fully Threaded	—	100	000000000	0000


								18-8 Stainless Steel







												No. 8 Screw Size

												1 5/8"	0.334"	0.031"	No. 2	Phillips	9	Partially Threaded	1 1/8"	25	000000000	00000

Steel Phillips Flat Head Screws for Wood and Composite Wood

Fasten these screws flush into wood decking and fencing. Also known as deck screws, their trumpet shape spreads pressure evenly to prevent splitting and surface damage. The flat head sits flush, so you won't need to worry about snags. The Phillips drive handles enough torque to screw into most kinds of wood without slipping.

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

Corrosion-Resistant-Coated Steel—Resist rust at the level of stainless steel. This coating has been tested against extreme standards for wet and outdoor environments, including 500 hours of salt spray.

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Flat Head Profile	Approx. Threads per In.	Threading	Tapping Method	Pkg. Qty.		Pkg.
Corrosion-Resistant-Coated Steel







				No. 6

				1 5/8"	0.347"	0.219"	1/16"	Standard	18	Fully Threaded	Thread Forming	200	000000000	00000

Strong-Hold Drywall Screws for Wood

Alternating high and low threads minimize driving torque and allow the screw to hold more material between threads for a stronger hold and better strip-resistance than standard drywall screws for wood. A curved neck sinks into drywall without tearing the paper surface.

Black Phosphate-Coated Steel—Black phosphate-coated steel screws resist corrosion in dry environments.

Length—Length is measured from the top of the head.

		Head		Drive
	Lg.	Dia.	Ht.	Size	Style	Max. Drilling Thk.	Approx. Threads per In.	Threading	Pkg. Qty.		Pkg.
Black Phosphate-Coated Steel







				No. 6 Screw Size

				1 5/8"	0.334"	0.031"	No. 2	Phillips	0.036"	18	Fully Threaded	100	000000000	00000

Steel Phillips Rounded Head Screws for Particleboard and Fiberboard

Deep, sharp, and widely spaced threads cut into workpieces without splitting them. These domed-head screws are often used on particleboard, medium-density fiberboard (MDF), and hardboard such as Masonite. The Phillips drive handles enough torque to drive into most kinds of wood without slipping.

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.

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Rounded Head Profile	Approx. Threads per In.	Threading	Tapping Method	Pkg. Qty.		Pkg.
Black-Oxide Steel







				No. 8

				1 5/8"	0.322"	0.115"	5/64"	Standard	11	Partially Threaded	Thread Forming	100	000000000	000000

Steel Phillips Flat Head Screws for Particleboard and Fiberboard

Deep, sharp, and widely spaced threads cut into workpieces without splitting them, while the head sits flush to prevent snags. These domed-head screws are often used on particleboard, medium-density fiberboard (MDF), and hardboard such as Masonite. The Phillips drive handles enough torque to drive into most kinds of wood without slipping.

Length is measured from under the head.

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

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Countersink Angle	Flat Head Profile	Approx. Threads per In.	Threading	Tapping Method	Pkg. Qty.		Pkg.
Black-Oxide Steel







				No. 8

				1 5/8"	0.332"	0.1"	5/64"	82°	Standard	11	Partially Threaded	Thread Forming	100	000000000	000000


				Zinc-Plated Steel







								No. 8

								1 5/8"	0.332"	0.1"	5/64"	82°	Standard	11	Partially Threaded	Thread Forming	50	000000000	0000

Steel Square-Drive Flat Head Screws for Wood and Composite Wood

The thin head reduces surface damage and leaves a smooth, near-invisible finish on trim, drywall, and other surfaces. These screws have a square drive that handles more torque than slotted and Phillips drives. Their flat head sits flush so they won't snag.

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

Black Phosphate-Coated Steel—More corrosion resistant than black-oxide steel, these screws are suitable for environments with minimal moisture. They have a dark, matte coating to create a finished look.

		Head
	Lg.	Dia.	Ht.	Drill Bit Size	Flat Head Profile	Approx. Threads per In.	Threading	Tapping Method	Pkg. Qty.		Pkg.
Black Phosphate-Coated Steel







				No. 6

				1 5/8"	0.224"	0.135"	1/16"	Narrow	18	Partially Threaded	Thread Forming	100	000000000	000000

Strip-Resistant Drywall Screws for Wood

Ribs under the head act as a brake to prevent over-tightening and damaging threads. A sharp point penetrates wood and sheet metal, and alternating high and low threads minimize driving torque. These screws are made from steel and have a coating that resists up to 500 hours of salt spray.

Length—Length is measured from the top of the head.

		Head		Drive
	Lg.	Dia.	Ht.	Size	Style	Max. Drilling Thk.	Approx. Threads per In.	Threading	Pkg. Qty.		Pkg.
Electrocoated Steel







				No. 9 Screw Size

				1 5/8"	0.405"	0.094"	No. 2	Phillips	0.036"	15	Fully Threaded	100	000000000	000000

Steel Phillips Flat Head Drilling Screws for Joining Wood to Sheet Metal

With Cutting Wings

Join wood to sheet metal by drilling, tapping, and fastening in one go. These screws have a self-drilling tip to clear the way while their threads tap into the material. The flat head sits flush, so you won't need to worry about snags. The Phillips drive handles enough torque to drive into most kinds of wood without slipping.

Length is measured from the top of the head.

Cutting-Winged Body—These wings create a tight hold by preventing screw threads from engaging until they reach the sheet metal. Then, the wings snap off so the screw can switch from drilling through wood to fastening into metal.

		Head
	Lg.	Dia.	Ht.	Drill Point Size	Drill Tip Lg.	For Wood Thk. Range	For Metal Thk. Range	Body Type	Flat Head Profile	Threading	Tapping Method	Pkg. Qty.		Pkg.
Corrosion-Resistant-Coated Steel







				12-24

				1 5/8"	0.476"	0.25"	No. 4	7/16"	0.75" to 1.125"	0.13" to 0.25"	Cutting Wings	Standard	Fully Threaded	Thread Forming	50	000000000	000000

Sealing Screws for Wood and Composite Wood

Prevent rot in roofs, decks, and outdoor posts. The rubber-backed washer in these screws keeps fluid out of fastened joints. They're made of stainless steel, so they won't degrade from chemically treated wood, such as ACQ-treated (arsenic-free) lumber. Also known as trim head screws, they exert less pressure on surfaces to curb splitting and distortion. The square drive handles more torque than slotted and Phillips drives, so it's less likely to slip.

The screw drill tip acts as a built-in pilot, though pilot holes are still recommended near edges to avoid splitting. Length is measured from the top of 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.

		Head						Washer
	Lg.	Dia.	Ht.	Drill Bit Size	Flat Head Profile	Approx. Threads per In.	Threading	OD	Thk.	Tapping Method	Tapping Screw Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Stainless Steel and Rubber Washer







				No. 7

				1 5/8"	0.23"	0.125"	1/16"	Standard	16	Partially Threaded	0.63"	0.2"	Thread Cutting	17	25	000000000	000000