70 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

	70	4	Partially Threaded	Thread Forming	DIN 571	25	97498A129	000000




			M8 × 3.6 mm

			70	5.5	Partially Threaded	Thread Forming	DIN 571	10	97498A144	0000




					M10 × 4.5 mm

					70	7	Partially Threaded	Thread Forming	DIN 571	10	97498A161	00000




							M12 × 5 mm

							70	8	Partially Threaded	Thread Forming	DIN 571	5	97498A175	0000




									M16 × 6 mm

									70	10	Partially Threaded	Thread Forming	DIN 571	1	97498A188	0000

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.

316 Stainless Steel—Superior to 18-8 stainless steel, these studs won't degrade when exposed to harsh weather, salt water, and most chemicals.

	(A)		(B)
	Screw Size	Thread Lg., mm	Thread Size	Thread Lg., mm	Lg., mm	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
316 Stainless Steel



		M6	37	M6 × 1 mm	30	70	Not Rated	Not Rated	1	98828A200	00000