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Tamper-Resistant Hex

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	System of Measurement System of Measurement

Inch

Metric

	Drive Size Drive Size

	Thread Size Thread Size

	Head Type Head Type


Rounded	Flat

	Length Length

	Material Material

Stainless Steel

Steel

	Rounded Head Style Rounded Head Style

	Button

	Head Diameter Head Diameter

	Threading Threading

	Fully Threaded
	Partially Threaded

	Thread Direction Thread Direction

	Right Hand

	Head Height Head Height

	Screw Size Screw Size

	Finish Finish

Black Oxide

Passivated

	Thread Type Thread Type

Metric

UNC

UNF

	Thread Spacing Thread Spacing

Coarse

Fine

	Hardness Hardness

	Thread Fit Thread Fit

Class 3A

Class 6g

	Tensile Strength Tensile Strength

70,000 psi

100,000 psi

130,000 psi

	Specifications Met Specifications Met

ASME

ASTM

	Rounded Head Profile Rounded Head Profile

Standard

	Tip Type Tip Type

	Pointed

	Flat Head Profile Flat Head Profile


Standard	Undercut

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141 Products

About Tapping Screws

About Rounded Head Screws

About Flat Head Screws

These 18-8 stainless steel 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.	Threading	Head Dia.	Head Ht.	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
4-40
3/16"	Fully Threaded	0.213"	0.059"	3/32"	70,000	ASME B18.3	50	000000000	000000
1/4"	Fully Threaded	0.213"	0.059"	3/32"	70,000	ASME B18.3	50	000000000	00000
3/8"	Fully Threaded	0.213"	0.059"	3/32"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	0.213"	0.059"	3/32"	70,000	ASME B18.3	25	000000000	0000
3/4"	Fully Threaded	0.213"	0.059"	3/32"	70,000	ASME B18.3	25	000000000	0000
6-32
1/4"	Fully Threaded	0.262"	0.073"	1/8"	70,000	ASME B18.3	25	000000000	0000
3/8"	Fully Threaded	0.262"	0.073"	1/8"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	0.262"	0.073"	1/8"	70,000	ASME B18.3	25	000000000	00000
3/4"	Fully Threaded	0.262"	0.073"	1/8"	70,000	ASME B18.3	25	000000000	00000
1"	Fully Threaded	0.262"	0.073"	1/8"	70,000	ASME B18.3	25	000000000	00000
8-32
1/4"	Fully Threaded	0.312"	0.087"	5/32"	70,000	ASME B18.3	25	000000000	0000
3/8"	Fully Threaded	0.312"	0.087"	5/32"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	0.312"	0.087"	5/32"	70,000	ASME B18.3	25	000000000	00000
3/4"	Fully Threaded	0.312"	0.087"	5/32"	70,000	ASME B18.3	25	000000000	00000
1 1/2"	Fully Threaded	0.312"	0.087"	5/32"	70,000	ASME B18.3	25	000000000	00000
10-24
3/4"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	25	000000000	00000
1"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	25	000000000	00000
1 1/2"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	10	000000000	0000
10-32
1/4"	Fully Threaded	0.361"	0.101"	5/32"	70,000	__	25	000000000	0000
1/2"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	25	000000000	00000
3/4"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	25	000000000	00000
1 1/2"	Fully Threaded	0.361"	0.101"	5/32"	70,000	ASME B18.3	10	000000000	0000
1/4"-20
1/4"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
3/8"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
1/2"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	25	000000000	00000
1 1/4"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
1 1/2"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
3"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	5	000000000	0000
1/4"-28
1/2"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
3/4"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
1"	Fully Threaded	0.437"	0.132"	5/32"	70,000	ASME B18.3	10	000000000	0000
5/16"-18
1/2"	Fully Threaded	0.547"	0.166"	3/16"	70,000	ASME B18.3	10	000000000	0000
3/8"-16
1/2"	Fully Threaded	0.656"	0.199"	7/32"	70,000	ASME B18.3	10	000000000	00000
3/4"	Fully Threaded	0.656"	0.199"	7/32"	70,000	ASME B18.3	5	000000000	0000
1"	Fully Threaded	0.656"	0.199"	7/32"	70,000	ASME B18.3	5	000000000	0000
1 1/4"	Fully Threaded	0.656"	0.199"	7/32"	70,000	__	5	000000000	0000
1 1/2"	Fully Threaded	0.656"	0.199"	7/32"	70,000	ASME B18.3	5	000000000	0000
2"	Fully Threaded	0.656"	0.199"	7/32"	70,000	ASME B18.3	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"	100,000	ASTM F879M	50	000000000	000000
M4 × 0.7 mm
8	Fully Threaded	7.59	2.18	5/32"	100,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	7.59	2.18	5/32"	100,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	7.59	2.18	5/32"	100,000	ASTM F879M	25	000000000	0000
M5 × 0.8 mm
12	Fully Threaded	9.50	2.74	5/32"	100,000	ASTM F879M	25	000000000	0000
16	Fully Threaded	9.50	2.74	5/32"	100,000	ASTM F879M	25	000000000	0000
M6 × 1 mm
10	Fully Threaded	10.49	3.28	5/32"	100,000	ASTM F879M	25	000000000	00000
16	Fully Threaded	10.49	3.28	5/32"	100,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	10.49	3.28	5/32"	100,000	ASTM F879M	10	000000000	0000
M8 × 1.25 mm
16	Fully Threaded	14.00	4.39	3/16"	100,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	14.00	4.39	3/16"	100,000	ASTM F879M	10	000000000	0000
M10 × 1.5 mm
20	Fully Threaded	17.50	5.49	7/32"	100,000	ASTM F879M	5	000000000	0000
30	Fully Threaded	17.50	5.49	7/32"	100,000	ASTM F879M	5	000000000	0000

Alloy Steel Tamper-Resistant
Button Head Hex Drive Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. They have a black-oxide finish that provides mild corrosion resistance in dry environments. Their 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.

Black-Oxide Alloy Steel
Lg.	Threading	Head Dia.	Head Ht.	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
4-40
3/16"	Fully Threaded	0.213"	0.059"	3/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
1/4"	Fully Threaded	0.213"	0.059"	3/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/8"	Fully Threaded	0.213"	0.059"	3/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
1/2"	Fully Threaded	0.213"	0.059"	3/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/4"	Fully Threaded	0.213"	0.059"	3/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
6-32
1/4"	Fully Threaded	0.262"	0.073"	1/8"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/8"	Fully Threaded	0.262"	0.073"	1/8"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
1/2"	Fully Threaded	0.262"	0.073"	1/8"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/4"	Fully Threaded	0.262"	0.073"	1/8"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
1"	Fully Threaded	0.262"	0.073"	1/8"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
8-32
1/4"	Fully Threaded	0.312"	0.087"	5/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
1/2"	Fully Threaded	0.312"	0.087"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
10-24
3/8"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
5/8"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
3/4"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
10-32
1/4"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/8"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	50	000000000	00000
3/4"	Fully Threaded	0.361"	0.101"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
12-24
1/2"	Fully Threaded	0.413"	0.114"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	0000
1/4"-20
3/4"	Fully Threaded	0.437"	0.132"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	00000
1"	Fully Threaded	0.437"	0.132"	5/32"	130,000	ASME B18.3, ASTM F835	25	000000000	00000
3/8"-16
3/4"	Fully Threaded	0.656"	0.199"	7/32"	130,000	ASME B18.3, ASTM F835	10	000000000	0000

Tamper-Resistant Hex Drive Flat Head Screws

Standard Profile

Undercut Profile

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.

Screws with an undercut profile have a shallow head for use in thin materials.

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

18-8 Stainless Steel
Lg.	Threading	Min. Thread Lg.	Flat Head Profile	Head Dia.	Head Ht.	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
4-40
1/4"	Fully Threaded	__	Standard	0.255"	0.083"	3/32"	70,000	ASME B18.3	25	000000000	00000
3/8"	Fully Threaded	__	Standard	0.255"	0.083"	3/32"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	__	Standard	0.255"	0.083"	3/32"	70,000	ASME B18.3	25	000000000	0000
6-32
1/4"	Fully Threaded	__	Undercut	0.307"	0.059"	1/8"	70,000	ASME B18.3	25	000000000	0000
3/8"	Fully Threaded	__	Standard	0.307"	0.097"	1/8"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	__	Standard	0.307"	0.097"	1/8"	70,000	ASME B18.3	25	000000000	0000
3/4"	Fully Threaded	__	Standard	0.307"	0.097"	1/8"	70,000	ASME B18.3	25	000000000	0000
8-32
3/8"	Fully Threaded	__	Standard	0.359"	0.112"	1/8"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	__	Standard	0.359"	0.112"	1/8"	70,000	ASME B18.3	25	000000000	0000
3/4"	Fully Threaded	__	Standard	0.359"	0.112"	1/8"	70,000	ASME B18.3	25	000000000	0000
1"	Fully Threaded	__	Standard	0.359"	0.112"	1/8"	70,000	ASME B18.3	25	000000000	0000
10-24
3/8"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
3/4"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
1"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	10	000000000	0000
10-32
3/8"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
1/2"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
3/4"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	25	000000000	0000
1"	Fully Threaded	__	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	10	000000000	0000
1 1/2"	Partially Threaded	7/8"	Standard	0.411"	0.127"	5/32"	70,000	ASME B18.3	10	000000000	0000
1/4"-20
1/2"	Fully Threaded	__	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000
5/8"	Fully Threaded	__	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000
3/4"	Fully Threaded	__	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000
1"	Fully Threaded	__	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000
1 1/4"	Partially Threaded	1"	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000
1 1/2"	Partially Threaded	1"	Standard	0.531"	0.161"	5/32"	70,000	ASME B18.3	10	000000000	0000

Metric Tamper-Resistant Hex Drive Flat Head Screws

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
8	Fully Threaded	6.71	1.85	3/32"	100,000	ASTM F879M	50	000000000	000000
M4 × 0.7 mm
10	Fully Threaded	8.94	2.48	5/32"	100,000	ASTM F879M	25	000000000	0000
12	Fully Threaded	8.94	2.48	5/32"	100,000	ASTM F879M	25	000000000	0000
M5 × 0.8 mm
8	Fully Threaded	11.2	3.10	5/32"	100,000	ASTM F879M	25	000000000	0000
20	Fully Threaded	11.2	3.10	5/32"	100,000	ASTM F879M	25	000000000	00000
M6 × 1 mm
16	Fully Threaded	13.44	3.72	5/32"	100,000	ASTM F879M	10	000000000	0000
M8 × 1.25 mm
16	Fully Threaded	17.91	4.95	3/16"	100,000	ASTM F879M	10	000000000	0000
20	Fully Threaded	17.91	4.95	3/16"	100,000	ASTM F879M	10	000000000	0000
30	Fully Threaded	17.91	4.95	3/16"	100,000	ASTM F879M	10	000000000	00000

Tamper-Resistant Hex Drive Rounded
Head Screws for Sheet Metal

Also known as pin-in-hex, install and remove these screws with a tamper-resistant hex driver. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. Length is measured from under the head.

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

	Head
Lg.	Dia.	Ht.	Drive Size	Drill Bit Size	Approximate Threads per Inch	Pkg. Qty.		Pkg.
18-8 Stainless Steel
No. 6
1/2"	0.282"	0.073"	1/8"	No. 32	18	25	000000000	00000
3/4"	0.282"	0.073"	1/8"	No. 32	18	25	000000000	00000
1"	0.282"	0.073"	1/8"	No. 32	18	25	000000000	00000
No. 8
1/2"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	0000
5/8"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	00000
3/4"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	00000
1"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	00000
1 1/4"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	00000
1 1/2"	0.312"	0.087"	5/32"	No. 29	15	25	000000000	00000
No. 10
1/2"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
3/4"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
1"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
1 1/4"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
1 1/2"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
2"	0.361"	0.101"	5/32"	No. 21	12	25	000000000	00000
No. 14
3/4"	0.437"	0.132"	5/32"	5.5 mm	10	25	000000000	00000
1"	0.437"	0.132"	5/32"	5.5 mm	10	25	000000000	00000
1 1/2"	0.437"	0.132"	5/32"	5.5 mm	10	10	000000000	0000

Tamper-Resistant Hex Drive Flat
Head Screws for Sheet Metal

Also known as pin-in-hex, install and remove these screws with a tamper-resistant hex driver. They're beveled under the head for a flush finish in countersunk holes. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. Screws penetrate 0.025" and thinner sheet metal. Length is measured from the top of the head.

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

	Head
Lg.	Dia.	Ht.	Drive Size	Drill Bit Size	Approximate Threads per Inch	Pkg. Qty.		Pkg.
18-8 Stainless Steel
No. 6
1/2"	0.307"	0.097"	1/8"	No. 32	18	25	000000000	00000
3/4"	0.307"	0.097"	1/8"	No. 32	18	25	000000000	00000
1"	0.307"	0.097"	1/8"	No. 32	18	25	000000000	00000
No. 8
1/2"	0.359"	0.112"	5/32"	No. 29	15	25	000000000	0000
3/4"	0.359"	0.112"	5/32"	No. 29	15	25	000000000	00000
1"	0.359"	0.112"	5/32"	No. 29	15	25	000000000	00000
No. 10
1/2"	0.411"	0.127"	5/32"	No. 21	12	25	000000000	00000
3/4"	0.411"	0.127"	5/32"	No. 21	12	25	000000000	00000
1"	0.411"	0.127"	5/32"	No. 21	12	25	000000000	00000
1 1/4"	0.411"	0.127"	5/32"	No. 21	12	25	000000000	00000
1 1/2"	0.411"	0.127"	5/32"	No. 21	12	25	000000000	00000
No. 14
3/4"	0.531"	0.161"	5/32"	5.5 mm	10	10	000000000	0000
1"	0.531"	0.161"	5/32"	5.5 mm	10	10	000000000	0000
1 1/4"	0.531"	0.161"	5/32"	5.5 mm	10	10	000000000	0000
1 1/2"	0.531"	0.161"	5/32"	5.5 mm	10	10	000000000	0000