45 mm Wood Screws | McMaster-Carr

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5 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







	M5 × 2.2 mm

	45	3.5	Partially Threaded	Thread Forming	DIN 571	50	97498A116	00000




			M6 × 2.6 mm

			45	4	Partially Threaded	Thread Forming	DIN 571	50	97498A125	00000




					M8 × 3.6 mm

					45	5.5	Partially Threaded	Thread Forming	DIN 571	25	97498A139	00000




							M10 × 4.5 mm

							45	7	Partially Threaded	Thread Forming	DIN 571	10	97498A156	0000




									M12 × 5 mm

									45	8	Partially Threaded	Thread Forming	DIN 571	10	97498A172	0000