90 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







	M6 × 2.6 mm

	90	4	Partially Threaded	Thread Forming	DIN 571	25	97498A132	000000




			M8 × 3.6 mm

			90	5.5	Partially Threaded	Thread Forming	DIN 571	10	97498A146	0000




					M10 × 4.5 mm

					90	7	Partially Threaded	Thread Forming	DIN 571	10	97498A163	00000




							M12 × 5 mm

							90	8	Partially Threaded	Thread Forming	DIN 571	5	97498A177	0000




									M16 × 6 mm

									90	10	Partially Threaded	Thread Forming	DIN 571	1	97498A191	0000