Metric Lags | McMaster-Carr

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	System of Measurement System of Measurement	Show

Metric

	System of Measurement System of Measurement	Hide

Inch

Metric

	Screw Size Screw Size

M10

M12

M16

	Thread Size Thread Size

M10

M12

M16

	Thread Pitch Thread Pitch

	Length Length

	Threading Threading

	Partially Threaded
	Threaded on Both Ends

	For Use In For Use In

Wood

	Material Material

Stainless Steel

Steel

	Head Width Head Width

	Head Height Head Height

	Minimum Thread Length Minimum Thread Length

	Finish Finish

Zinc Plated

	Specifications Met Specifications Met

DIN

	Thread Type Thread Type

Metric

	Thread Fit Thread Fit

Class 6g

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About Tapping Screws

About Threaded Studs and Rods

Drive the pointed tip of these screws into soft material, such as wood and drywall. They are also known as lag bolts. Made from steel, they are strong and wear resistant, and have a zinc plating to protect the steel from rust in wet environments. The hex head provides a secure grip for wrenches, so you can tighten them in place. They meet DIN 571, which is an international standard for the dimensions of wood screws.

Drill a pilot hole slightly smaller than the screw to avoid splitting shorter boards. Screws with larger diameters are more likely to split your wood.

	Head
Lg., mm	Wd., mm	Ht., mm	Threading	Min. Thread Lg., mm	Specifications Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel
M5
20	8	3.5	Partially Threaded	12	DIN 571	100	000000000	00000
25	8	3.5	Partially Threaded	15	DIN 571	100	000000000	00000
30	8	3.5	Partially Threaded	18	DIN 571	100	000000000	00000
35	8	3.5	Partially Threaded	21	DIN 571	50	000000000	0000
40	8	3.5	Partially Threaded	24	DIN 571	50	000000000	0000
45	8	3.5	Partially Threaded	27	DIN 571	50	000000000	0000
50	8	3.5	Partially Threaded	30	DIN 571	50	000000000	0000
60	8	3.5	Partially Threaded	36	DIN 571	50	000000000	00000
M6
20	10	4	Partially Threaded	12	DIN 571	50	000000000	0000
25	10	4	Partially Threaded	15	DIN 571	50	000000000	0000
30	10	4	Partially Threaded	18	DIN 571	50	000000000	00000
35	10	4	Partially Threaded	21	DIN 571	50	000000000	0000
40	10	4	Partially Threaded	24	DIN 571	50	000000000	0000
45	10	4	Partially Threaded	27	DIN 571	50	000000000	00000
50	10	4	Partially Threaded	30	DIN 571	25	000000000	0000
55	10	4	Partially Threaded	33	DIN 571	25	000000000	0000
60	10	4	Partially Threaded	36	DIN 571	25	000000000	0000
70	10	4	Partially Threaded	42	DIN 571	25	000000000	0000
80	10	4	Partially Threaded	48	DIN 571	25	000000000	0000
90	10	4	Partially Threaded	54	DIN 571	25	000000000	00000
100	10	4	Partially Threaded	60	DIN 571	25	000000000	00000
120	10	4	Partially Threaded	72	DIN 571	10	000000000	0000
M8
25	13	5.5	Partially Threaded	15	DIN 571	25	000000000	0000
30	13	5.5	Partially Threaded	18	DIN 571	25	000000000	0000
35	13	5.5	Partially Threaded	21	DIN 571	25	000000000	0000
40	13	5.5	Partially Threaded	24	DIN 571	25	000000000	0000
45	13	5.5	Partially Threaded	27	DIN 571	25	000000000	0000
50	13	5.5	Partially Threaded	30	DIN 571	25	000000000	00000
55	13	5.5	Partially Threaded	33	DIN 571	25	000000000	00000
60	13	5.5	Partially Threaded	36	DIN 571	10	000000000	0000
70	13	5.5	Partially Threaded	42	DIN 571	10	000000000	0000
80	13	5.5	Partially Threaded	48	DIN 571	10	000000000	0000
90	13	5.5	Partially Threaded	54	DIN 571	10	000000000	0000
100	13	5.5	Partially Threaded	60	DIN 571	10	000000000	0000
120	13	5.5	Partially Threaded	72	DIN 571	10	000000000	0000
130	13	5.5	Partially Threaded	78	DIN 571	10	000000000	0000
140	13	5.5	Partially Threaded	84	DIN 571	10	000000000	00000
160	13	5.5	Partially Threaded	96	DIN 571	5	000000000	0000
M10
30	17	7	Partially Threaded	18	DIN 571	10	000000000	0000
35	17	7	Partially Threaded	21	DIN 571	10	000000000	0000
40	17	7	Partially Threaded	24	DIN 571	10	000000000	0000
45	17	7	Partially Threaded	27	DIN 571	10	000000000	0000
50	17	7	Partially Threaded	30	DIN 571	10	000000000	0000
55	17	7	Partially Threaded	33	DIN 571	10	000000000	0000
60	17	7	Partially Threaded	36	DIN 571	10	000000000	0000
70	17	7	Partially Threaded	42	DIN 571	10	000000000	0000
80	17	7	Partially Threaded	48	DIN 571	10	000000000	00000
90	17	7	Partially Threaded	54	DIN 571	10	000000000	00000
100	17	7	Partially Threaded	60	DIN 571	10	000000000	00000
120	17	7	Partially Threaded	72	DIN 571	5	000000000	0000
140	17	7	Partially Threaded	84	DIN 571	5	000000000	0000
160	17	7	Partially Threaded	96	DIN 571	5	000000000	0000
180	17	7	Partially Threaded	108	DIN 571	5	000000000	00000
200	17	7	Partially Threaded	120	DIN 571	1	000000000	0000
M12
40	19	8	Partially Threaded	24	DIN 571	10	000000000	0000
45	19	8	Partially Threaded	27	DIN 571	10	000000000	0000
50	19	8	Partially Threaded	30	DIN 571	10	000000000	00000
60	19	8	Partially Threaded	36	DIN 571	5	000000000	0000
70	19	8	Partially Threaded	42	DIN 571	5	000000000	0000
80	19	8	Partially Threaded	48	DIN 571	5	000000000	0000
90	19	8	Partially Threaded	54	DIN 571	5	000000000	0000
100	19	8	Partially Threaded	60	DIN 571	5	000000000	0000
120	19	8	Partially Threaded	72	DIN 571	5	000000000	00000
140	19	8	Partially Threaded	84	DIN 571	5	000000000	00000
160	19	8	Partially Threaded	96	DIN 571	1	000000000	0000
180	19	8	Partially Threaded	108	DIN 571	1	000000000	0000
200	19	8	Partially Threaded	120	DIN 571	1	000000000	0000
220	19	8	Partially Threaded	132	DIN 571	1	000000000	0000
240	19	8	Partially Threaded	144	DIN 571	1	000000000	0000
M16
60	24	10	Partially Threaded	36	DIN 571	5	000000000	0000
70	24	10	Partially Threaded	42	DIN 571	1	000000000	0000
80	24	10	Partially Threaded	48	DIN 571	1	000000000	0000
90	24	10	Partially Threaded	54	DIN 571	1	000000000	0000
100	24	10	Partially Threaded	60	DIN 571	1	000000000	0000
120	24	10	Partially Threaded	72	DIN 571	1	000000000	0000

Metric Stainless Steel Wood Screw Threaded Studs

316 stainless steel studs have excellent resistance to chemicals and salt water and may be mildly magnetic. Also known as hanger bolts, use them to hang, mount, and fasten parts to wood structures. Install with a stud driver or create wrench flats by threading two nuts onto the stud and jamming them together.

For technical drawings and 3-D models, click on a part number.

(A)		(B)
Screw Size	Thread Lg., mm	Thread Size	Thread Pitch, mm	Thread Lg., mm	Lg., mm	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
316 Stainless Steel
M5	30	M5	0.8	20	50	Not Rated	Not Rated	1	000000000	00000
M6	40	M6	1	30	70	Not Rated	Not Rated	1	000000000	0000
M8	60	M8	1.25	40	100	Not Rated	Not Rated	1	000000000	00000

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About Tapping Screws

About Threaded Studs and Rods

Metric Steel Hex Head Screws for Wood

Metric Stainless Steel Wood Screw Threaded Studs