ASTM F879M Screws | McMaster-Carr

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152 Products

About Flat Head Screws

About Rounded Head Screws

Made from 18-8 stainless steel, these button head screws have good chemical resistance and may be mildly magnetic. They’re passivated for added protection against oxidation and corrosion. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools. For installation tools, see tamper-resistant Torx drivers and bits. Length is measured from under the head.

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

18-8 Stainless Steel
Lg., mm	Threading	Head Dia., mm	Head Ht., mm	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
M3 × 0.5 mm
6	Fully Threaded	5.69	1.65	T8	80,000	ASTM F879M, ISO 7380	50	000000000	000000
8	Fully Threaded	5.69	1.65	T8	80,000	ASTM F879M, ISO 7380	50	000000000	00000
10	Fully Threaded	5.69	1.65	T8	80,000	ASTM F879M, ISO 7380	50	000000000	00000
12	Fully Threaded	5.69	1.65	T8	80,000	ASTM F879M, ISO 7380	50	000000000	00000
16	Fully Threaded	5.69	1.65	T8	80,000	ASTM F879M, ISO 7380	50	000000000	00000
M4 × 0.7 mm
10	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	0000
12	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	0000
16	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	0000
20	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	00000
25	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	00000
30	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	00000
40	Fully Threaded	7.60	2.18	T15	80,000	ASTM F879M, ISO 7380	25	000000000	00000
M5 × 0.8 mm
8	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	0000
10	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
12	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
16	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
20	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
25	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
30	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	25	000000000	00000
40	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	10	000000000	0000
50	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	10	000000000	0000
60	Fully Threaded	9.50	2.74	T25	80,000	ASTM F879M, ISO 7380	10	000000000	0000
M6 × 1 mm
10	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	25	000000000	00000
12	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	25	000000000	00000
16	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	0000
20	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	0000
25	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	0000
30	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	0000
40	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	00000
50	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	00000
60	Fully Threaded	10.50	3.28	T27	80,000	ASTM F879M, ISO 7380	10	000000000	00000
M8 × 1.25 mm
12	Fully Threaded	14.00	4.39	T40	80,000	ASTM F879M, ISO 7380	10	000000000	00000
16	Fully Threaded	14.00	4.39	T40	80,000	ASTM F879M, ISO 7380	10	000000000	00000
20	Fully Threaded	14.00	4.39	T40	80,000	ASTM F879M, ISO 7380	10	000000000	00000
25	Fully Threaded	14.00	4.39	T40	80,000	ASTM F879M, ISO 7380	10	000000000	00000
30	Fully Threaded	14.00	4.39	T40	80,000	ASTM F879M, ISO 7380	10	000000000	00000
M10 × 1.5 mm
20	Fully Threaded	17.50	5.50	T45	80,000	ASTM F879M, ISO 7380	5	000000000	0000
25	Fully Threaded	17.50	5.50	T45	80,000	ASTM F879M, ISO 7380	5	000000000	0000
30	Fully Threaded	17.50	5.50	T45	80,000	ASTM F879M, ISO 7380	5	000000000	00000

Metric Sealing Stainless Steel Tamper-Resistant Button Head Torx Screws

Tamper-Resistant Torx

To prevent unwanted removal, these metric screws have a tamper-resistant Torx drive—also known as a pin-in Torx drive—that makes them difficult to unscrew without special tools. An O-ring under the head blocks leaks and seals out dust and dirt. It’s Buna-N rubber, which withstands wet and abrasive environments. Made of 18-8 stainless steel, these screws have good corrosion resistance and may be mildly magnetic. All are passivated for added protection against corrosion.

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

Passivated 18-8 Stainless Steel with Buna-N Rubber O-Ring
Length, mm	Threading	Head Diameter, mm	Head Height, mm	For Maximum Hole Diameter, mm	Drive Size	Tensile Strength, psi	O-Ring Temperature Range, °F	Maximum Pressure, psi	Specifications Met	Pkg. Qty.		Pkg.
M3 × 0.5 mm
6	Fully Threaded	5.69	1.65	3.454	T8	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	000000
8	Fully Threaded	5.69	1.65	3.454	T8	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
10	Fully Threaded	5.69	1.65	3.454	T8	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
12	Fully Threaded	5.69	1.65	3.454	T8	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
16	Fully Threaded	5.69	1.65	3.454	T8	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
M4 × 0.7 mm
10	Fully Threaded	7.6	2.18	4.546	T15	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
12	Fully Threaded	7.6	2.18	4.546	T15	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
20	Fully Threaded	7.6	2.18	4.546	T15	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
25	Fully Threaded	7.6	2.18	4.546	T15	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
M5 × 0.8 mm
8	Fully Threaded	9.5	2.74	5.562	T25	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
16	Fully Threaded	9.5	2.74	5.562	T25	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
20	Fully Threaded	9.5	2.74	5.562	T25	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
25	Fully Threaded	9.5	2.74	5.562	T25	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
M6 × 1 mm
12	Fully Threaded	10.5	3.28	6.655	T27	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
16	Fully Threaded	10.5	3.28	6.655	T27	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
20	Fully Threaded	10.5	3.28	6.655	T27	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000
25	Fully Threaded	10.5	3.28	6.655	T27	100,000	-40° to 225°	1,500	ASTM F879M, ISO 7380	5	000000000	00000

Metric Stainless Steel Tamper-Resistant Button Head Hex Drive Screws

Made from 18-8 stainless steel, these button head screws have good chemical resistance and may be mildly magnetic. They’re passivated for added protection against oxidation and corrosion. The tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools. For installation tools, see tamper-resistant hex drivers and bits. Length is measured from under the head.

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

18-8 Stainless Steel
Lg., mm	Threading	Head Dia., mm	Head Ht., mm	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
M3 × 0.5 mm
6	Fully Threaded	6.20	1.65	3/32"	80,000	ASTM F879M	50	000000000	000000
8	Fully Threaded	6.20	1.65	3/32"	80,000	ASTM F879M	50	000000000	00000
10	Fully Threaded	5.69	1.65	3/32"	80,000	ASTM F879M	50	000000000	00000
12	Fully Threaded	5.69	1.65	3/32"	80,000	ASTM F879M	50	000000000	00000
M4 × 0.7 mm
6	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	50	000000000	00000
8	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	25	000000000	0000
10	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	7.59	2.18	5/32"	80,000	ASTM F879M	25	000000000	00000
M5 × 0.8 mm
8	Fully Threaded	9.50	2.74	5/32"	80,000	ASTM F879M	25	000000000	00000
10	Fully Threaded	9.50	2.74	5/32"	80,000	ASTM F879M	25	000000000	00000
12	Fully Threaded	9.50	2.74	5/32"	80,000	ASTM F879M	25	000000000	00000
16	Fully Threaded	9.50	2.74	5/32"	80,000	ASTM F879M	25	000000000	00000
20	Fully Threaded	9.50	2.74	5/32"	80,000	ASTM F879M	25	000000000	00000
M6 × 1 mm
10	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	25	000000000	00000
12	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	25	000000000	00000
16	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	10	000000000	0000
25	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	10	000000000	0000
30	Fully Threaded	10.49	3.28	5/32"	80,000	ASTM F879M	10	000000000	0000
M8 × 1.25 mm
12	Fully Threaded	14.00	4.39	3/16"	80,000	ASTM F879M	10	000000000	00000
16	Fully Threaded	14.00	4.39	3/16"	80,000	ASTM F879M	10	000000000	00000
20	Fully Threaded	14.00	4.39	3/16"	80,000	ASTM F879M	10	000000000	00000
25	Fully Threaded	14.00	4.39	3/16"	80,000	ASTM F879M	10	000000000	00000
30	Fully Threaded	14.00	4.39	3/16"	80,000	ASTM F879M	10	000000000	00000
M10 × 1.5 mm
20	Fully Threaded	17.50	5.49	7/32"	80,000	ASTM F879M	5	000000000	0000
25	Fully Threaded	17.50	5.49	7/32"	80,000	ASTM F879M	5	000000000	00000
30	Fully Threaded	17.50	5.49	7/32"	80,000	ASTM F879M	5	000000000	00000

Metric Tamper-Resistant Torx Flat Head Screws

With a tamper-resistant Torx drive (also known as a pin-in Torx drive), these screws are difficult to remove without special tools. For installation tools, see tamper-resistant Torx drivers and bits. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.

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

18-8 Stainless Steel
Lg., mm	Threading	Head Dia., mm	Head Ht., mm	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
M3 × 0.5 mm
6	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	00000
8	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	0000
10	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	6.70	1.90	T10	80,000	ASTM F879M	25	000000000	0000
M3.5 × 0.6 mm
6	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
8	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
10	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
25	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
30	Fully Threaded	8.20	2.30	T15	80,000	ASTM F879M	25	000000000	0000
M4 × 0.7 mm
6	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
8	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
10	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	0000
25	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	00000
30	Fully Threaded	8.90	2.50	T20	80,000	ASTM F879M	25	000000000	00000
M5 × 0.8 mm
8	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	0000
10	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	00000
25	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	00000
30	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	25	000000000	00000
40	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	10	000000000	0000
50	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	10	000000000	0000
60	Fully Threaded	11.20	3.10	T25	80,000	ASTM F879M	10	000000000	0000
M6 × 1 mm
10	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
12	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
16	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
25	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
30	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
40	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
50	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	0000
60	Fully Threaded	13.40	3.70	T30	80,000	ASTM F879M	10	000000000	00000
M8 × 1.25 mm
16	Fully Threaded	17.90	5.00	T45	80,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	17.90	5.00	T45	80,000	ASTM F879M	10	000000000	00000
25	Fully Threaded	17.90	5.00	T45	80,000	ASTM F879M	10	000000000	00000
30	Fully Threaded	17.90	5.00	T45	80,000	ASTM F879M	10	000000000	00000

Metric Tamper-Resistant Hex Drive Flat Head Screws

A tamper-resistant hex drive (also known as a pin-in hex drive) makes these screws difficult to remove without special tools. For installation tools, see tamper-resistant hex drivers and bits. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.

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

18-8 Stainless Steel
Lg., mm	Threading	Head Dia., mm	Head Ht., mm	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
M3 × 0.5 mm
6	Fully Threaded	6.71	1.85	3/32"	80,000	ASTM F879M	50	000000000	000000
8	Fully Threaded	6.71	1.85	3/32"	80,000	ASTM F879M	50	000000000	00000
10	Fully Threaded	6.71	1.85	3/32"	80,000	ASTM F879M	50	000000000	00000
12	Fully Threaded	6.71	1.85	3/32"	80,000	ASTM F879M	50	000000000	00000
M4 × 0.7 mm
6	Fully Threaded	8.94	2.48	5/32"	80,000	ASTM F879M	25	000000000	00000
8	Fully Threaded	8.94	2.48	5/32"	80,000	ASTM F879M	25	000000000	00000
10	Fully Threaded	8.94	2.48	5/32"	80,000	ASTM F879M	25	000000000	00000
12	Fully Threaded	8.94	2.48	5/32"	80,000	ASTM F879M	25	000000000	00000
16	Fully Threaded	8.94	2.48	5/32"	80,000	ASTM F879M	25	000000000	00000
M5 × 0.8 mm
8	Fully Threaded	11.2	3.10	5/32"	80,000	ASTM F879M	25	000000000	00000
10	Fully Threaded	11.2	3.10	5/32"	80,000	ASTM F879M	25	000000000	00000
12	Fully Threaded	11.2	3.10	5/32"	80,000	ASTM F879M	25	000000000	00000
16	Fully Threaded	11.2	3.10	5/32"	80,000	ASTM F879M	25	000000000	00000
20	Fully Threaded	11.2	3.10	5/32"	80,000	ASTM F879M	25	000000000	00000
M6 × 1 mm
12	Fully Threaded	13.44	3.72	5/32"	80,000	ASTM F879M	10	000000000	0000
16	Fully Threaded	13.44	3.72	5/32"	80,000	ASTM F879M	10	000000000	00000
20	Fully Threaded	13.44	3.72	5/32"	80,000	ASTM F879M	10	000000000	00000
25	Fully Threaded	13.44	3.72	5/32"	80,000	ASTM F879M	10	000000000	00000
30	Fully Threaded	13.44	3.72	5/32"	80,000	ASTM F879M	10	000000000	00000
M8 × 1.25 mm
16	Fully Threaded	17.91	4.95	3/16"	80,000	ASTM F879M	10	000000000	00000
20	Fully Threaded	17.91	4.95	3/16"	80,000	ASTM F879M	10	000000000	00000
25	Fully Threaded	17.91	4.95	3/16"	80,000	ASTM F879M	10	000000000	00000
30	Fully Threaded	17.91	4.95	3/16"	80,000	ASTM F879M	10	000000000	00000

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About Flat Head Screws

About Rounded Head Screws

Metric Stainless Steel Tamper-Resistant Button Head Torx Screws

Metric Sealing Stainless Steel Tamper-Resistant Button Head Torx Screws

Metric Stainless Steel Tamper-Resistant Button Head Hex Drive Screws

Metric Tamper-Resistant Torx Flat Head Screws

Metric Tamper-Resistant Hex Drive Flat Head Screws