Pin-in-Hex Drive Bolts | McMaster-Carr

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170 Products

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Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Our most corrosion-resistant hex-drive screws for preventing unauthorized access. Also known as pin-in-hex and pin-in-socket drives, these screws have a security pin in the drive that you can only turn with a tamper-resistant hex driver. The deep six-point opening helps them withstand torque without damaging the drive. The button head looks similar to a pan head, but it's lower and more compact, taking up less space.

Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.

Power Tool Bits—Pair these bits with your power tools to turn screws more quickly than manual tools.

	Screws								Power Tool Bits
		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.		Each
18-8 Stainless Steel







				4-40

				3/16"	0.213"	0.059"	Fully Threaded	70,000	50	95635A260	000000	7240A31	00000


				1/4"	0.213"	0.059"	Fully Threaded	70,000	50	95635A261	00000	7240A31	0000
				3/8"	0.213"	0.059"	Fully Threaded	70,000	25	95635A262	0000	7240A31	0000
				1/2"	0.213"	0.059"	Fully Threaded	70,000	25	95635A263	0000	7240A31	0000
				3/4"	0.213"	0.059"	Fully Threaded	70,000	25	95635A264	00000	7240A31	0000




						6-32

						1/4"	0.262"	0.073"	Fully Threaded	70,000	25	95635A337	0000	7240A33	0000


						3/8"	0.262"	0.073"	Fully Threaded	70,000	25	95635A338	00000	7240A33	0000
						1/2"	0.262"	0.073"	Fully Threaded	70,000	25	95635A339	00000	7240A33	0000
						3/4"	0.262"	0.073"	Fully Threaded	70,000	25	95635A347	00000	7240A33	0000
						1"	0.262"	0.073"	Fully Threaded	70,000	25	95635A352	00000	7240A33	0000




								8-32

								1/4"	0.312"	0.087"	Fully Threaded	70,000	25	95635A373	00000	7240A35	0000


								3/8"	0.312"	0.087"	Fully Threaded	70,000	25	95635A374	00000	7240A35	0000
								1/2"	0.312"	0.087"	Fully Threaded	70,000	25	95635A375	00000	7240A35	0000
								3/4"	0.312"	0.087"	Fully Threaded	70,000	25	95635A383	00000	7240A35	0000
								1"	0.312"	0.087"	Fully Threaded	70,000	25	95635A387	00000	7240A35	0000
								1 1/2"	0.312"	0.087"	Fully Threaded	70,000	25	95635A391	00000	7240A35	0000




										10-24

										3/8"	0.361"	0.101"	Fully Threaded	70,000	25	95635A240	00000	7240A35	0000


										1/2"	0.361"	0.101"	Fully Threaded	70,000	25	95635A242	00000	7240A35	0000
										3/4"	0.361"	0.101"	Fully Threaded	70,000	25	95635A245	00000	7240A35	0000
										1"	0.361"	0.101"	Fully Threaded	70,000	25	95635A403	00000	7240A35	0000
										1 1/2"	0.361"	0.101"	Fully Threaded	70,000	10	95635A404	0000	7240A35	0000




												10-32

												3/8"	0.361"	0.101"	Fully Threaded	70,000	25	95635A417	0000	7240A35	0000


1/2"	0.361"											0.101"	Fully Threaded	70,000	25	95635A419	00000	7240A35	0000
3/4"	0.361"											0.101"	Fully Threaded	70,000	25	95635A427	00000	7240A35	0000
1"	0.361"											0.101"	Fully Threaded	70,000	25	95635A431	00000	7240A35	0000
1 1/2"	0.361"											0.101"	Fully Threaded	70,000	10	95635A432	0000	7240A35	0000




		1/4"-20

		1/4"	0.437"									0.132"	Fully Threaded	70,000	10	95635A535	0000	7240A35	0000


		3/8"	0.437"									0.132"	Fully Threaded	70,000	10	95635A536	0000	7240A35	0000
		1/2"	0.437"									0.132"	Fully Threaded	70,000	25	95635A537	00000	7240A35	0000
		5/8"	0.437"									0.132"	Fully Threaded	70,000	10	95635A539	0000	7240A35	0000
		3/4"	0.437"									0.132"	Fully Threaded	70,000	10	95635A540	0000	7240A35	0000
		1"	0.437"									0.132"	Fully Threaded	70,000	10	95635A542	0000	7240A35	0000
		1 1/4"	0.437"	0.132"								Fully Threaded	70,000	10	95635A547	0000	7240A35	0000
		1 1/2"	0.437"	0.132"	Fully Threaded							70,000	10	95635A551	0000	7240A35	0000
		3"	0.437"	0.132"	Fully Threaded							70,000	5	95635A554	00000	7240A35	0000




				1/4"-28

				1/2"	0.437"							0.132"	Fully Threaded	70,000	10	95635A450	0000	7240A35	0000


				3/4"	0.437"							0.132"	Fully Threaded	70,000	10	95635A451	00000	7240A35	0000
				1"	0.437"							0.132"	Fully Threaded	70,000	10	95635A452	00000	7240A35	0000




						5/16"-18

						1/2"	0.547"					0.166"	Fully Threaded	70,000	10	95635A568	00000	7240A36	0000


						3/4"	0.547"					0.166"	Fully Threaded	70,000	10	95635A567	00000	7240A36	0000
						1"	0.547"					0.166"	Fully Threaded	70,000	10	95635A571	00000	7240A36	0000




								3/8"-16

								1/2"	0.656"			0.199"	Fully Threaded	70,000	10	95635A594	00000	7240A37	0000


								3/4"	0.656"			0.199"	Fully Threaded	70,000	5	95635A595	0000	7240A37	0000
								1"	0.656"			0.199"	Fully Threaded	70,000	5	95635A599	0000	7240A37	0000
								1 1/2"	0.656"			0.199"	Fully Threaded	70,000	5	95635A607	00000	7240A37	0000
								2"	0.656"			0.199"	Fully Threaded	70,000	5	95635A608	00000	7240A37	0000




												M3 × 0.5 mm

										6 mm	6.2 mm	1.65 mm	Fully Threaded	80,000	50	95635A650	00000	7240A31	0000


										8 mm	6.2 mm	1.65 mm	Fully Threaded	80,000	50	95635A651	00000	7240A31	0000
										10 mm	5.69 mm	1.65 mm	Fully Threaded	80,000	50	95635A652	00000	7240A31	0000
										12 mm	5.69 mm	1.65 mm	Fully Threaded	80,000	50	95635A653	00000	7240A31	0000




										M4 × 0.7 mm

										6 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	50	95635A670	00000	7240A35	0000


										8 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	25	95635A671	0000	7240A35	0000
										10 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	25	95635A672	0000	7240A35	0000
										12 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	25	95635A673	0000	7240A35	0000
										16 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	25	95635A675	0000	7240A35	0000
										20 mm	7.59 mm	2.18 mm	Fully Threaded	80,000	25	95635A811	00000	7240A35	0000




												M5 × 0.8 mm

		8 mm	9.5 mm									2.74 mm	Fully Threaded	80,000	25	95635A690	00000	7240A35	0000


		10 mm	9.5 mm									2.74 mm	Fully Threaded	80,000	25	95635A691	00000	7240A35	0000
		12 mm	9.5 mm									2.74 mm	Fully Threaded	80,000	25	95635A692	00000	7240A35	0000
		16 mm	9.5 mm									2.74 mm	Fully Threaded	80,000	25	95635A694	00000	7240A35	0000
		20 mm	9.5 mm									2.74 mm	Fully Threaded	80,000	25	95635A696	00000	7240A35	0000




				M6 × 1 mm

				10 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	25	95635A710	00000	7240A35	0000


				12 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	25	95635A711	00000	7240A35	0000
				16 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	10	95635A713	0000	7240A35	0000
				20 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	10	95635A715	0000	7240A35	0000
				25 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	10	95635A716	0000	7240A35	0000
				30 mm	10.49 mm							3.28 mm	Fully Threaded	80,000	10	95635A812	0000	7240A35	0000




						M8 × 1.25 mm

						12 mm	14 mm					4.39 mm	Fully Threaded	80,000	10	95635A730	00000	7240A36	0000


						16 mm	14 mm					4.39 mm	Fully Threaded	80,000	10	95635A732	00000	7240A36	0000
						20 mm	14 mm					4.39 mm	Fully Threaded	80,000	10	95635A734	00000	7240A36	0000
						25 mm	14 mm					4.39 mm	Fully Threaded	80,000	10	95635A735	00000	7240A36	0000
						30 mm	14 mm					4.39 mm	Fully Threaded	80,000	10	95635A736	00000	7240A36	0000




								M10 × 1.5 mm

								20 mm	17.5 mm			5.49 mm	Fully Threaded	80,000	5	95635A750	0000	7240A37	0000


								25 mm	17.5 mm			5.49 mm	Fully Threaded	80,000	5	95635A751	00000	7240A37	0000
								30 mm	17.5 mm			5.49 mm	Fully Threaded	80,000	5	95635A752	00000	7240A37	0000

Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws

Image of Product. Front orientation. Contains Annotated, MultipleImages. Flat Head Screws. Tamper-Resistant Hex-Drive Stainless Steel Flat Head Screws.

Prevent unauthorized access and damage to components. These screws have a security pin in the drive that you can only turn with a tamper-resistant hex driver. Also known as pin-in-hex and pin-in-socket drives, the deep six-point opening helps them withstand torque without damaging the drive. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals.

Length is measured from the top of the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.

Standard Profile—Standard-profile heads are the most common choice for flat head screws.

Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.

Power Tool Bits—Pair these bits with your power tools to turn screws more quickly than manual tools.

	Screws										Power Tool Bits
				Head
	Lg.	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.		Each
18-8 Stainless Steel







				4-40

				1/4"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	25	90517A110	00000	7240A31	00000


				3/8"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	25	90517A120	0000	7240A31	0000
				1/2"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	25	90517A130	0000	7240A31	0000




						6-32

						1/4"	82°	Undercut	0.307"	0.059"	Fully Threaded	70,000	25	90517A140	0000	7240A33	0000


						3/8"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	25	90517A111	0000	7240A33	0000
						1/2"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	25	90517A112	0000	7240A33	0000
						3/4"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	25	90517A113	0000	7240A33	0000




								8-32

								3/8"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	25	90517A211	0000	7240A33	0000


								1/2"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	25	90517A212	0000	7240A33	0000
								3/4"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	25	90517A213	00000	7240A33	0000
								1"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	25	90517A214	00000	7240A33	0000




										10-24

										3/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A311	00000	7240A35	0000


										1/2"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A312	00000	7240A35	0000
										3/4"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A313	00000	7240A35	0000
										1"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	10	90517A314	0000	7240A35	0000




												10-32

												3/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A411	00000	7240A35	0000


												1/2"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A412	00000	7240A35	0000
												3/4"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	25	90517A413	00000	7240A35	0000
												1"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	10	90517A414	0000	7240A35	0000
												1 1/2"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	10	90517A415	0000	7240A35	0000




												1/4"-20

		1/2"										82°	Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A511	0000	7240A35	0000


		5/8"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A512	0000	7240A35	0000
		3/4"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A513	0000	7240A35	0000
		1"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A514	0000	7240A35	0000
		1 1/4"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A515	00000	7240A35	0000
		1 1/2"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	10	90517A516	00000	7240A35	0000




				M3 × 0.5 mm

				6 mm	90°							Standard	6.71 mm	1.85 mm	Fully Threaded	80,000	50	90517A150	00000	7240A31	0000


				8 mm	90°							Standard	6.71 mm	1.85 mm	Fully Threaded	80,000	50	90517A160	00000	7240A31	0000
				10 mm	90°							Standard	6.71 mm	1.85 mm	Fully Threaded	80,000	50	90517A170	00000	7240A31	0000
				12 mm	90°							Standard	6.71 mm	1.85 mm	Fully Threaded	80,000	50	90517A180	00000	7240A31	0000




						M4 × 0.7 mm

						6 mm	90°					Standard	8.94 mm	2.48 mm	Fully Threaded	80,000	25	90517A190	0000	7240A35	0000


						8 mm	90°					Standard	8.94 mm	2.48 mm	Fully Threaded	80,000	25	90517A210	0000	7240A35	0000
						10 mm	90°					Standard	8.94 mm	2.48 mm	Fully Threaded	80,000	25	90517A220	0000	7240A35	0000
						12 mm	90°					Standard	8.94 mm	2.48 mm	Fully Threaded	80,000	25	90517A230	0000	7240A35	0000
						16 mm	90°					Standard	8.94 mm	2.48 mm	Fully Threaded	80,000	25	90517A240	0000	7240A35	0000




								M5 × 0.8 mm

								8 mm	90°			Standard	11.2 mm	3.10 mm	Fully Threaded	80,000	25	90517A250	0000	7240A35	0000


								10 mm	90°			Standard	11.2 mm	3.10 mm	Fully Threaded	80,000	25	90517A260	00000	7240A35	0000
								12 mm	90°			Standard	11.2 mm	3.10 mm	Fully Threaded	80,000	25	90517A270	00000	7240A35	0000
								16 mm	90°			Standard	11.2 mm	3.10 mm	Fully Threaded	80,000	25	90517A280	00000	7240A35	0000
								20 mm	90°			Standard	11.2 mm	3.10 mm	Fully Threaded	80,000	25	90517A290	00000	7240A35	0000




										M6 × 1 mm

										12 mm	90°	Standard	13.44 mm	3.72 mm	Fully Threaded	80,000	10	90517A310	0000	7240A35	0000


										16 mm	90°	Standard	13.44 mm	3.72 mm	Fully Threaded	80,000	10	90517A320	0000	7240A35	0000
										20 mm	90°	Standard	13.44 mm	3.72 mm	Fully Threaded	80,000	10	90517A330	0000	7240A35	0000
										25 mm	90°	Standard	13.44 mm	3.72 mm	Fully Threaded	80,000	10	90517A340	0000	7240A35	0000
										30 mm	90°	Standard	13.44 mm	3.72 mm	Fully Threaded	80,000	10	90517A350	0000	7240A35	0000




										M8 × 1.25 mm

										16 mm	90°	Standard	17.91 mm	4.95 mm	Fully Threaded	80,000	10	90517A360	00000	7240A36	0000


										20 mm	90°	Standard	17.91 mm	4.95 mm	Fully Threaded	80,000	10	90517A370	00000	7240A36	0000
										25 mm	90°	Standard	17.91 mm	4.95 mm	Fully Threaded	80,000	10	90517A380	00000	7240A36	0000
										30 mm	90°	Standard	17.91 mm	4.95 mm	Fully Threaded	80,000	10	90517A390	00000	7240A36	0000

Tamper-Resistant Hex-Drive Steel Button Head Screws

Our strongest hex-drive screws for deterring unauthorized access. Also known as pin-in-hex and pin-in-socket drives, these screws have a security pin in the drive that you can only turn with a tamper-resistant hex driver. The deep six-point opening helps them withstand torque without damaging the drive. Made of alloy steel, they have nearly twice the tensile strength of other screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space.

Length is measured from under the head.

Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Power Tool Bits—Pair these bits with your power tools to turn screws more quickly than manual tools.

	Screws								Power Tool Bits
		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.		Each
Black-Oxide Alloy Steel







				4-40

				3/16"	0.213"	0.059"	Fully Threaded	130,000	50	90484A160	000000	7240A31	00000


				1/4"	0.213"	0.059"	Fully Threaded	130,000	50	90484A161	00000	7240A31	0000
				3/8"	0.213"	0.059"	Fully Threaded	130,000	50	90484A162	00000	7240A31	0000
				1/2"	0.213"	0.059"	Fully Threaded	130,000	50	90484A163	00000	7240A31	0000
				3/4"	0.213"	0.059"	Fully Threaded	130,000	50	90484A164	00000	7240A31	0000




						6-32

						1/4"	0.262"	0.073"	Fully Threaded	130,000	50	90484A182	00000	7240A33	0000


						3/8"	0.262"	0.073"	Fully Threaded	130,000	50	90484A183	00000	7240A33	0000
						1/2"	0.262"	0.073"	Fully Threaded	130,000	50	90484A184	00000	7240A33	0000
						3/4"	0.262"	0.073"	Fully Threaded	130,000	50	90484A185	00000	7240A33	0000
						1"	0.262"	0.073"	Fully Threaded	130,000	50	90484A186	00000	7240A33	0000




								8-32

								1/4"	0.312"	0.087"	Fully Threaded	130,000	50	90484A135	00000	7240A35	0000


								3/8"	0.312"	0.087"	Fully Threaded	130,000	50	90484A137	00000	7240A35	0000
								1/2"	0.312"	0.087"	Fully Threaded	130,000	25	90484A139	00000	7240A35	0000
								3/4"	0.312"	0.087"	Fully Threaded	130,000	25	90484A143	00000	7240A35	0000
								1"	0.312"	0.087"	Fully Threaded	130,000	25	90484A145	00000	7240A35	0000




										10-24

										3/8"	0.361"	0.101"	Fully Threaded	130,000	25	90484A240	00000	7240A35	0000


										1/2"	0.361"	0.101"	Fully Threaded	130,000	25	90484A242	0000	7240A35	0000
										5/8"	0.361"	0.101"	Fully Threaded	130,000	25	90484A244	0000	7240A35	0000
										3/4"	0.361"	0.101"	Fully Threaded	130,000	25	90484A245	0000	7240A35	0000
										1"	0.361"	0.101"	Fully Threaded	130,000	25	90484A247	0000	7240A35	0000




												10-32

												1/4"	0.361"	0.101"	Fully Threaded	130,000	50	90484A255	00000	7240A35	0000


3/8"												0.361"	0.101"	Fully Threaded	130,000	50	90484A256	00000	7240A35	0000
1/2"	0.361"											0.101"	Fully Threaded	130,000	25	90484A257	0000	7240A35	0000
3/4"	0.361"											0.101"	Fully Threaded	130,000	25	90484A261	0000	7240A35	0000
1"	0.361"											0.101"	Fully Threaded	130,000	25	90484A263	00000	7240A35	0000




		12-24

		1/2"	0.413"									0.114"	Fully Threaded	130,000	25	90484A269	0000	7240A35	0000




												1/4"-20

												3/8"	0.437"	0.132"	Fully Threaded	130,000	25	90484A535	00000	7240A35	0000


				1/2"	0.437"							0.132"	Fully Threaded	130,000	25	90484A537	00000	7240A35	0000
				5/8"	0.437"							0.132"	Fully Threaded	130,000	25	90484A539	00000	7240A35	0000
				3/4"	0.437"							0.132"	Fully Threaded	130,000	25	90484A540	00000	7240A35	0000
				1"	0.437"							0.132"	Fully Threaded	130,000	25	90484A542	00000	7240A35	0000
				1 1/2"	0.437"							0.132"	Fully Threaded	130,000	25	90484A547	00000	7240A35	0000




												5/16"-18

												3/4"	0.547"	0.166"	Fully Threaded	130,000	10	90484A555	0000	7240A36	0000


						1"	0.547"					0.166"	Fully Threaded	130,000	10	90484A557	00000	7240A36	0000




												3/8"-16

												3/4"	0.656"	0.199"	Fully Threaded	130,000	10	90484A569	00000	7240A37	0000


												1"	0.656"	0.199"	Fully Threaded	130,000	10	90484A571	00000	7240A37	0000