Aluminum Self-Drilling Screws

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Rounded Head Style

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Corrosion-Resistant Coated

Galvanic Barrier Coated

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EAR99

DFARS Specialty Metals

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178 Products

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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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	00000
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

Stainless Steel Flat Head Drilling Screws for Metal

Standard Flat Head

Made from stainless steel, these screws are more corrosion resistant than steel, and almost as strong. All are beveled under the head for use in countersunk holes. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from the top of the head.

18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. Use them to drill through aluminum and sheet metal.

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

		Drill Tip			Head
Lg.	Flat Head Profile	Type	Lg.	Max. Drilling Thick.	Dia.	Ht.	Drive Size	Approximate Threads per Inch	For Use In	Pkg. Qty.		Pkg.
18-8 Stainless Steel
No. 4
1/2"	Standard	No. 2	5/32"	0.08"	0.212"	0.067"	No. 1	24	Aluminum, Sheet Metal	25	000000000	00000
5/8"	Standard	No. 2	5/32"	0.08"	0.212"	0.067"	No. 1	24	Aluminum, Sheet Metal	25	000000000	0000
3/4"	Standard	No. 2	5/32"	0.08"	0.212"	0.067"	No. 1	24	Aluminum, Sheet Metal	25	000000000	0000
No. 6
1/2"	Standard	No. 2	3/16"	0.09"	0.262"	0.083"	No. 2	20	Aluminum, Sheet Metal	25	000000000	0000
3/4"	Standard	No. 2	3/16"	0.09"	0.262"	0.083"	No. 2	20	Aluminum, Sheet Metal	25	000000000	0000
7/8"	Standard	No. 2	3/16"	0.09"	0.262"	0.083"	No. 2	20	Aluminum, Sheet Metal	25	000000000	0000
1"	Standard	No. 2	3/16"	0.09"	0.262"	0.083"	No. 2	20	Aluminum, Sheet Metal	10	000000000	0000
No. 8
1/2"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	25	000000000	0000
5/8"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	25	000000000	0000
3/4"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	25	000000000	0000
7/8"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	25	000000000	0000
1"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	25	000000000	0000
1 1/4"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	10	000000000	0000
2"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	10	000000000	0000
2 1/2"	Standard	No. 2	7/32"	0.1"	0.312"	0.1"	No. 2	18	Aluminum, Sheet Metal	10	000000000	0000
No. 10
3/4"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
7/8"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
1"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
1 1/4"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
1 1/2"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
2"	Standard	No. 3	19/64"	0.11"	0.362"	0.116"	No. 2	16	Aluminum, Sheet Metal	10	000000000	0000
No. 12
1"	Standard	No. 3	11/32"	0.14"	0.412"	0.132"	No. 3	14	Aluminum, Sheet Metal	10	000000000	0000
1 1/4"	Standard	No. 3	11/32"	0.14"	0.412"	0.132"	No. 3	14	Aluminum, Sheet Metal	10	000000000	0000
1 1/2"	Standard	No. 3	11/32"	0.14"	0.412"	0.132"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
2"	Standard	No. 3	11/32"	0.14"	0.412"	0.132"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
2 1/2"	Standard	No. 3	11/32"	0.14"	0.412"	0.132"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
No. 14
3/4"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
1"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
1 1/4"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
1 1/2"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
1 3/4"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
2"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
2 1/4"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	5	000000000	0000
2 1/2"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
3"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
3 1/2"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
4"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
4 1/2"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
5"	Standard	No. 3	11/32"	0.175"	0.477"	0.153"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000

Stainless Steel Hex Head Drilling Screws for Aluminum

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Use them to fasten aluminum to aluminum and steel framing. The hex head allows for a secure grip with a wrench and a flange reduces the risk of crushing thin metal. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from under the flange. Head height includes the flange.

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

	Drill Tip			Head
Lg.	Type	Lg.	Max. Drilling Thick.	Wd.	Ht.	Flange Dia.	Thread Size	Approximate Threads per Inch	For Use In	Pkg. Qty.		Pkg.
Galvanic Barrier Coated 18-8 Stainless Steel
No. 8
1/2"	No. 2	3/16"	0.098"	0.25"	0.141"	0.348"	__	18	Aluminum, Sheet Metal	25	000000000	000000
3/4"	No. 2	3/16"	0.098"	0.25"	0.141"	0.348"	__	18	Aluminum, Sheet Metal	25	000000000	00000
No. 10
3/4"	No. 3	1/4"	0.15"	0.313"	0.151"	0.414"	__	16	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 3	1/4"	0.15"	0.313"	0.151"	0.414"	__	16	Aluminum, Sheet Metal	25	000000000	00000
No. 12
3/4"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1 1/4"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
2"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	5	000000000	0000
2 1/2"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	5	000000000	0000
3"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	5	000000000	00000
1/4"
3/4"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000

Alloy Steel Hex Head Drilling Screws for Aluminum

Known for their strength, these alloy steel screws are coated to provide corrosion resistance in wet environments. Use them to fasten aluminum to aluminum and steel framing. The hex head allows for a secure grip with a wrench and a flange reduces the risk of crushing thin metal. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from under the flange. Head height includes the flange.

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

	Drill Tip			Head
Lg.	Type	Lg.	Max. Drilling Thick.	Wd.	Ht.	Flange Dia.	Thread Size	Approximate Threads per Inch	For Use In	Pkg. Qty.		Pkg.
Ultra-Corrosion-Resistant Coated Alloy Steel
No. 10
3/4"	No. 3	1/4"	0.15"	0.313"	0.151"	0.414"	__	16	Aluminum, Sheet Metal	25	000000000	000000
No. 12
7/8"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1 1/2"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1 3/4"	No. 5	45/64"	0.5"	0.313"	0.194"	0.432"	12-24	__	Aluminum, Sheet Metal	10	000000000	00000
2"	No. 3	9/32"	0.187"	0.313"	0.194"	0.432"	__	14	Aluminum, Sheet Metal	25	000000000	00000
1/4"
1"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	10	000000000	00000
1 1/8"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000
2"	No. 3	5/16"	0.21"	0.375"	0.24"	0.52"	__	14	Aluminum, Sheet Metal	10	000000000	0000
2"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000
2 1/2"	No. 4	5/16"	0.236"	0.375"	0.24"	0.52"	1/4"-20	__	Aluminum, Sheet Metal	10	000000000	00000

Aluminum Hex Head Drilling Screws for Aluminum

One-third the weight of steel, aluminum screws resist corrosion in wet environments and are nonmagnetic. Use them to fasten aluminum to aluminum. The hex head allows for a secure grip with a wrench and a flange reduces the risk of crushing thin metal. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from under the flange. Head height includes the flange.

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

	Drill Tip			Head
Lg.	Type	Lg.	Max. Drilling Thick.	Wd.	Ht.	Flange Dia.	Approximate Threads per Inch	For Use In	Pkg. Qty.		Pkg.
7075 Aluminum
No. 8
1/2"	No. 2	3/16"	0.098"	0.25"	0.141"	0.348"	18	Aluminum	10	000000000	000000
3/4"	No. 2	3/16"	0.098"	0.25"	0.141"	0.348"	18	Aluminum	10	000000000	00000
1"	No. 2	3/16"	0.098"	0.25"	0.141"	0.348"	18	Aluminum	10	000000000	00000
No. 10
1/2"	No. 2	13/64"	0.106"	0.313"	0.151"	0.414"	16	Aluminum	10	000000000	00000
3/4"	No. 2	13/64"	0.106"	0.313"	0.151"	0.414"	16	Aluminum	10	000000000	00000
1"	No. 2	13/64"	0.106"	0.313"	0.151"	0.414"	16	Aluminum	10	000000000	00000

Rounded Head Drilling Screws for Aluminum

Fasten aluminum to aluminum and steel framing. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. They save you time and effort by drilling their own holes and fastening in a single operation. Length is measured from under the head.

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

	Drill Tip			Head
Lg.	Type	Lg.	Max. Drilling Thick.	Dia.	Ht.	Drive Size	Approximate Threads per Inch	For Use In	Pkg. Qty.		Pkg.
18-8 Stainless Steel
No. 6
3/8"	No. 2	9/64"	0.09"	0.27"	0.097"	No. 1	20	Aluminum, Sheet Metal	25	000000000	000000
1/2"	No. 2	9/64"	0.09"	0.27"	0.097"	No. 1	20	Aluminum, Sheet Metal	25	000000000	00000
No. 8
3/8"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	25	000000000	00000
1/2"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	25	000000000	00000
5/8"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	25	000000000	00000
3/4"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	25	000000000	00000
1"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	10	000000000	00000
1 1/4"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	10	000000000	00000
1 1/2"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	10	000000000	00000
2"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	10	000000000	00000
2 1/2"	No. 2	3/16"	0.1"	0.322"	0.115"	No. 2	18	Aluminum, Sheet Metal	10	000000000	00000
No. 10
1/2"	No. 2	13/64"	0.11"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	10	000000000	00000
5/8"	No. 3	1/4"	0.175"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	10	000000000	00000
3/4"	No. 3	1/4"	0.175"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	10	000000000	00000
1"	No. 3	1/4"	0.15"	0.373"	0.137"	No. 2	16	Aluminum, Sheet Metal	25	000000000	00000
1 1/2"	No. 3	1/4"	0.15"	0.373"	0.137"	No. 2	16	Aluminum, Sheet Metal	25	000000000	00000
1 3/4"	No. 3	1/4"	0.175"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	5	000000000	00000
2"	No. 3	1/4"	0.15"	0.373"	0.137"	No. 2	16	Aluminum, Sheet Metal	25	000000000	00000
2 1/2"	No. 3	1/4"	0.175"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	5	000000000	00000
3"	No. 3	1/4"	0.175"	0.373"	0.133"	No. 2	16	Aluminum, Sheet Metal	5	000000000	00000
No. 12
3/4"	No. 3	9/32"	0.21"	0.425"	0.151"	No. 3	14	Aluminum, Sheet Metal	10	000000000	00000
1"	No. 3	9/32"	0.21"	0.425"	0.151"	No. 3	14	Aluminum, Sheet Metal	10	000000000	00000
1 1/4"	No. 3	9/32"	0.21"	0.425"	0.151"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
1 1/2"	No. 3	9/32"	0.21"	0.425"	0.151"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
2"	No. 3	9/32"	0.21"	0.425"	0.151"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
1/4"
3/4"	No. 3	5/16"	0.22"	0.492"	0.175"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
1"	No. 3	5/16"	0.22"	0.492"	0.175"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
1 1/4"	No. 3	5/16"	0.22"	0.492"	0.175"	No. 3	14	Aluminum, Sheet Metal	5	000000000	00000
1 1/2"	No. 3	5/16"	0.22"	0.492"	0.175"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000
2"	No. 3	5/16"	0.22"	0.492"	0.175"	No. 3	14	Aluminum, Sheet Metal	1	000000000	0000

Flat Head Drilling Screws for Aluminum

Beveled under the head for use in countersunk holes. Use these screws to fasten aluminum to aluminum and steel framing. They save you time and effort by drilling their own holes and fastening in a single operation. Made from alloy steel, they're coated to resist corrosion in wet environments. Length is measured from the top of the head.

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

	Drill Tip			Head
Lg.	Type	Lg.	Max. Drilling Thick.	Dia.	Ht.	Drive Size	Approximate Threads per Inch	Threading	Min. Thread Lg.	For Use In	Pkg. Qty.		Pkg.
Corrosion-Resistant-Coated Alloy Steel
No. 12
1"	No. 3	9/32"	0.187"	0.415"	0.09"	No. 3	14	Fully Threaded	__	Aluminum, Sheet Metal	25	000000000	000000
1 1/2"	No. 3	9/32"	0.187"	0.415"	0.09"	No. 3	14	Fully Threaded	__	Aluminum, Sheet Metal	25	000000000	0000
1/4"
3"	No. 4	1/2"	0.312"	0.46"	0.1"	No. 3	20	Partially Threaded	2"	Aluminum, Sheet Metal	10	000000000	0000
4"	No. 4	1/2"	0.312"	0.46"	0.1"	No. 3	20	Partially Threaded	2"	Aluminum, Sheet Metal	10	000000000	00000

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About Tapping Screws

Metric Steel Phillips Rounded Head Drilling Screws for Metal

Stainless Steel Flat Head Drilling Screws for Metal

Stainless Steel Hex Head Drilling Screws for Aluminum

Alloy Steel Hex Head Drilling Screws for Aluminum

Aluminum Hex Head Drilling Screws for Aluminum

Rounded Head Drilling Screws for Aluminum

Flat Head Drilling Screws for Aluminum