Insulation Screws | McMaster-Carr

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Insulation

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	System of Measurement System of Measurement

Inch

Metric

	Screw Size Screw Size

	Length Length

	Tip Type Tip Type

	Drilling

	Head Type Head Type

	Rounded

	Drive Style Drive Style

	Phillips

	Rounded Head Style Rounded Head Style

	Pan

	Material Material

Steel

	Head Diameter Head Diameter

	Threading Threading

	Fully Threaded
	Partially Threaded

	Finish Finish

Black Epoxy Coated

Ultra-Corrosion-Resistant
Coated

Zinc Plated

	Maximum Drilling Thickness Maximum Drilling Thickness

	Tapping Method Tapping Method

	Thread Forming

	Minimum Thread Length Minimum Thread Length

	Drive Size Drive Size

No. 1

No. 2

No. 3

	Thread Direction Thread Direction

	Right Hand

	Specifications Met Specifications Met

DIN

ISO

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Shank Cross Section Shank Cross Section

Round

	Head Height Head Height

	Thread Type Thread Type

Metric

	Approximate Thread Pitch Approximate Thread Pitch

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About Tapping Screws

Drill a pilot hole, cut threads, and fasten in one motion with these metric-threaded screws. They're self-drilling, meaning they have a pointed tip that forms a pilot hole as they enter your material. As they turn, they also cut their own reusable threads, so you don’t need to drill and tap a hole first. Designed for fastening metal to metal, these screws are often used to install ducts and other assemblies where you can only access one side. The rounded head gives your project a finished look. Made of steel, they’re strong and wear resistant. They’re also plated with zinc to protect the steel from rust and extend the life of the screws. They meet ISO and DIN dimensional standards.

The miminum thread length may vary for screws with an overall length of 50mm or longer.

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

		Drill Tip			Head
Lg., mm	Min. Thread Lg., mm	Type	Lg., mm	Max. Drilling Thick., mm	Dia., mm	Ht., mm	Drive Size	Approximate Thread Pitch, mm	For Use In	Specifications Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel
M2.9
9.5	3.3	No. 1	6.25	1.9	5.6	2.4	No. 1	1.1	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
13	6.6	No. 1	6.4	1.9	5.6	2.4	No. 1	1.1	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
16	9.6	No. 1	6.4	1.9	5.6	2.4	No. 1	1.1	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
19	12.5	No. 1	6.5	1.9	5.6	2.4	No. 1	1.1	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
M3.5
9.5	2.9	No. 2	6.65	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
13	6.2	No. 2	6.8	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
16	9.2	No. 2	6.8	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
19	12.1	No. 2	6.9	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
22	15.1	No. 2	6.9	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
25	18.1	No. 2	6.9	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
32	25.1	No. 2	6.9	2.25	7	2.6	No. 2	1.3	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
M3.9
9.5	2.8	No. 2	6.7	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
13	5.8	No. 2	7.2	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
16	8.8	No. 2	7.2	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
19	11.7	No. 2	7.3	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
22	14.7	No. 2	7.3	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
25	17.7	No. 2	7.3	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
32	24.5	No. 2	7.5	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
38	30.5	No. 2	7.5	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
45	37.5	No. 2	7.5	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
50	42.5	No. 2	7.5	2.4	7.5	2.8	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
M4.2
13	4.3	No. 2	8.7	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
16	7.3	No. 2	8.7	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
19	10.3	No. 2	8.7	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
22	13.3	No. 2	8.7	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
25	16.3	No. 2	8.7	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
32	23	No. 2	9	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
38	29	No. 2	9	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
45	36	No. 2	9	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
50	41	No. 2	9	3	8.2	3.1	No. 2	1.4	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
M4.8
13	3.7	No. 2	9.3	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
16	5.8	No. 2	10.2	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	0000
19	8.7	No. 2	10.3	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
22	11.7	No. 2	10.3	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
25	14.7	No. 2	10.3	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	100	000000000	00000
32	21.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
38	27.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
45	34.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
50	39.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
60	49.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	00000
70	59.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
80	69.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
90	79.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
100	89.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	00000
110	99.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000
120	109.5	No. 2	10.5	4.4	9.5	3.7	No. 2	1.6	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000
M5.5
16	5	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
19	8	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
22	11	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
25	14	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
32	21	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
38	27	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
45	34	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
50	39	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
60	49	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
70	59	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
80	69	No. 3	11	5.25	11	4	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
M6.3
16	4	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	0000
19	7	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	00000
22	10	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	00000
25	13	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	50	000000000	00000
32	20	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
38	26	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
45	33	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
50	38	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	0000
60	48	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	25	000000000	00000
70	58	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000
80	68	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000
90	78	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000
100	88	No. 3	12	6	12.5	4.6	No. 3	1.8	Steel, Stainless Steel, Aluminum, Fabric, Insulation, Sheet Metal, Wood	DIN 7504 N, ISO 7049	10	000000000	0000

Drilling Screws for Joining Insulation to Metal

Polypropylene Plastic

Steel Washer

Also known as roofing screws, these screws are long and made from hardened steel to fasten rigid insulation board to steel decking. They save you time and effort by drilling their own holes and fastening in a single operation. Made from steel, they're coated to resist corrosion in wet environments. Length is measured from under the head.

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

		Head
Lg.	Max. Drilling Thick.	Dia.	Ht.	Drive Size	Approximate Threads per Inch	Threading	Thread Length	For Use In	Specifications Met	Pkg. Qty.		Pkg.
Black Epoxy Coated Steel
No. 15
2"	0.047"	0.435"	0.118"	No. 3	13	Fully Threaded	__	Steel, Insulation, Sheet Metal	FM Approved	50	000000000	000000
3"	0.047"	0.435"	0.118"	No. 3	13	Fully Threaded	__	Steel, Insulation, Sheet Metal	FM Approved	25	000000000	00000
4"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	3"	Steel, Insulation, Sheet Metal	FM Approved	25	000000000	00000
5"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	20	000000000	00000
6"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	0000
7"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	00000
8"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	00000
10"	0.047"	0.435"	0.118"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	5	000000000	00000
Ultra-Corrosion-Resistant Coated Steel
No. 12
2 7/8"	0.047"	0.438"	0.116"	No. 3	13	Fully Threaded	__	Steel, Insulation, Sheet Metal	FM Approved	20	000000000	0000
3 3/4"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	3"	Steel, Insulation, Sheet Metal	FM Approved	20	000000000	00000
4 1/2"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	3"	Steel, Insulation, Sheet Metal	FM Approved	20	000000000	00000
5"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	3"	Steel, Insulation, Sheet Metal	FM Approved	20	000000000	00000
6"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	0000
7"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	00000
8"	0.047"	0.438"	0.116"	No. 3	13	Partially Threaded	4"	Steel, Insulation, Sheet Metal	FM Approved	10	000000000	00000

Round Plastic Washers (Pkg. of 25)	000000000	Pkg.	000000
Hex Steel Washers (Pkg. of 50)	000000000	Pkg.	00000

Over 48,000 metals now include traceable material certificates.

About Tapping Screws

Metric Steel Phillips Rounded
Head Drilling Screws for Metal

Drilling Screws for Joining Insulation to Metal

About Tapping Screws

Metric Steel Phillips RoundedHead Drilling Screws for Metal

Drilling Screws for Joining Insulation to Metal

Metric Steel Phillips Rounded
Head Drilling Screws for Metal