M12 Thread Lags | McMaster-Carr

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15 Products

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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	Pkg. Qty.		Pkg.
Zinc-Plated Steel







	M12 × 5 mm

	40	8	Partially Threaded	Thread Forming	10	97498A171	000000


	45	8	Partially Threaded	Thread Forming	10	97498A172	0000
	50	8	Partially Threaded	Thread Forming	10	97498A173	00000
	60	8	Partially Threaded	Thread Forming	5	97498A174	0000
	70	8	Partially Threaded	Thread Forming	5	97498A175	0000
	80	8	Partially Threaded	Thread Forming	5	97498A176	0000
	90	8	Partially Threaded	Thread Forming	5	97498A177	0000
	100	8	Partially Threaded	Thread Forming	5	97498A178	00000
	120	8	Partially Threaded	Thread Forming	5	97498A179	00000
	140	8	Partially Threaded	Thread Forming	5	97498A181	00000
	160	8	Partially Threaded	Thread Forming	1	97498A182	0000


	180	8	Partially Threaded	Thread Forming	1	97498A183	0000
	200	8	Partially Threaded	Thread Forming	1	97498A184	0000
	220	8	Partially Threaded	Thread Forming	1	97498A185	0000
	240	8	Partially Threaded	Thread Forming	1	97498A186	0000