120 mm Wood Screws | McMaster-Carr

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6 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.

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

	Tapping Method	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	M6 × 2.6 mm

	120	4	Partially Threaded	Thread Forming	DIN 571	10	97498A134	00000




			M8 × 3.6 mm

			120	5.5	Partially Threaded	Thread Forming	DIN 571	10	97498A148	00000




					M10 × 4.5 mm

					120	7	Partially Threaded	Thread Forming	DIN 571	5	97498A165	0000




							M12 × 5 mm

							120	8	Partially Threaded	Thread Forming	DIN 571	5	97498A179	00000




									M16 × 6 mm

									120	10	Partially Threaded	Thread Forming	DIN 571	1	97498A193	0000

Steel Phillips Rounded Head Drilling Screws

Drill and fasten metal in one step and create a finished look with these rounded head screws. The Phillips drive withstands less torque than a hex drive, so apply even, steady pressure when drilling.

Length is measured from under the head.

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

		Drill Tip		Head, mm
	Lg., mm	Point Size	Lg., mm	Dia.	Ht.	Max. Drilling Thk., mm	Drive Size	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M4.8 Screw Size

				120	No. 2	10.5	9.5	3.7	4.4	No. 2	DIN 7504 N, ISO 7049	10	90769A151	00000