DIN 961 Cap Screws | McMaster-Carr

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100,000 psi or greater

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192 Products

About Hex Head Screws and Bolts

Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.

Performance

High Strength

Bear the burden of heavy loads and high stress without breaking

48 products

Corrosion Resistant

Stand up to moisture, chemicals, and harsh weather

58 products

Performance

Chemical Resistant

Won't degrade when exposed to most chemicals

26 products

Color

Blue

A distinctive blue color helps you identify them fast

7 products

Steel Hex Head Screws

Fully Threaded

Our most popular hex head screws. These have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

Length is measured from under the head.

Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.

High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

Zinc-Yellow-Chromate-Plated Steel—With slightly better corrosion resistance than zinc-plated steel screws, these stand up to more frequent exposure to moisture.

Dyed Steel—The distinctive blue color makes it easy to tell these metric-sized screws apart from inch screws.

		Head, mm
	Lg., mm	Wd.	Ht.	Threading	Thread Spacing	Fastener Strength Grade/Class	Tensile Strength, psi	Pkg. Qty.		Pkg.
Medium-Strength Zinc-Plated Steel







				M8 × 1 mm

				10	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A525	000000


				12	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A901	0000
				16	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A527	00000
				20	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	50	91180A530	00000
				25	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	50	91180A534	00000
				30	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	50	91180A538	00000
				35	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A539	00000
				40	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A540	00000
				45	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	10	91180A351	0000
				50	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	10	91180A352	0000




						M10 × 1.25 mm

						16	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	25	91180A624	00000


						20	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	25	91180A626	00000
						25	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	25	91180A630	00000
						30	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	25	91180A634	00000
						35	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A636	0000
						40	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A639	00000
						45	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A375	00000
						50	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A376	00000
						60	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A904	00000




								M10 × 1 mm

								16	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A363	0000


								20	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A552	0000
								25	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A553	00000
								30	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A555	00000
								35	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A557	00000
								40	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A364	00000
								45	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A902	00000
								50	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A365	00000
								60	17	6.4	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A903	00000




										M12 × 1.5 mm

										16	19	7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A906	00000


20										19	7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A743	00000
25	19									7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A745	00000
30	19									7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A747	00000
35	19									7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A749	00000
40	19									7.5	Fully Threaded	Fine	Class 8.8	110,000	10	91180A751	00000
45	19	7.5								Fully Threaded	Fine	Class 8.8	110,000	10	91180A907	00000
50	19	7.5	Fully Threaded							Fine	Class 8.8	110,000	5	91180A752	00000
60	19	7.5	Fully Threaded							Fine	Class 8.8	110,000	5	91180A908	00000




		M12 × 1.25 mm

		20	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A711	00000


		25	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A714	00000
		30	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A716	00000
		35	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A718	00000
		40	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A720	00000
		45	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A725	00000
		50	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	5	91180A390	0000
		60	19							7.5	Fully Threaded	Extra Fine	Class 8.8	110,000	10	91180A905	00000




				M14 × 1.5 mm

				20	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	1	91180A774	0000


				25	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	5	91180A776	00000
				30	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	10	91180A778	00000
				35	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	10	91180A780	00000
				40	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	5	91180A782	00000
				45	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	5	91180A909	00000
				50	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	5	91180A786	00000
				55	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	5	91180A787	00000
				60	22					8.8	Fully Threaded	Fine	Class 8.8	110,000	1	91180A381	0000




						M16 × 1.5 mm

						20	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A912	00000


						25	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A913	00000
						30	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A860	00000
						35	24			10	Fully Threaded	Fine	Class 8.8	110,000	1	91180A865	0000
						40	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A870	00000
						45	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A355	00000
						50	24			10	Fully Threaded	Fine	Class 8.8	110,000	5	91180A876	00000
						60	24			10	Fully Threaded	Fine	Class 8.8	110,000	1	91180A914	0000




								M18 × 1.5 mm

								30	27	11.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A915	0000


								35	27	11.7	Fully Threaded	Fine	Class 8.8	110,000	1	91280A027	0000
								40	27	11.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A916	0000
								50	27	11.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A917	0000
								60	27	11.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A918	0000




M20 × 2 mm

50	30									12.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A919	0000


60	30									12.5	Fully Threaded	Fine	Class 8.8	110,000	1	91180A921	0000




										M20 × 1.5 mm

										30	30	12.5	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91180A922	0000


										35	30	12.7	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91280A033	0000
										40	30	12.5	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91180A923	0000
		50								30	12.5	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91180A924	0000
		60	30							12.5	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91180A925	0000
		70	30							12.7	Fully Threaded	Extra Fine	Class 8.8	110,000	1	91280A034	0000


		Medium-Strength Steel







												M8 × 1 mm

												20	13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A199	00000


				25								13	5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A133	0000
				30	13							5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A134	0000
				50	13							5.3	Fully Threaded	Fine	Class 8.8	110,000	25	91180A135	00000




												M10 × 1.25 mm

												16	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	25	91180A136	00000


												20	17	6.6	Fully Threaded	Fine	Class 8.8	110,000	25	91280A320	0000
												25	17	6.6	Fully Threaded	Fine	Class 8.8	110,000	25	91280A370	00000
												30	17	6.4	Fully Threaded	Fine	Class 8.8	110,000	10	91180A137	0000
												35	17	6.6	Fully Threaded	Fine	Class 8.8	110,000	25	91280A371	00000
						40						17	6.6	Fully Threaded	Fine	Class 8.8	110,000	10	91280A372	0000
						60	17					6.4	Fully Threaded	Fine	Class 8.8	110,000	5	91180A213	0000


						High-Strength Zinc-Yellow-Chromate-Plated Steel







														M8 × 1 mm

								16						13	5.5	Fully Threaded	Fine	Class 10.9	150,000	10	90854A811	0000


								20	13					5.3	Fully Threaded	Fine	Class 10.9	150,000	25	91052A101	00000
								25	13					5.3	Fully Threaded	Fine	Class 10.9	150,000	25	91052A102	00000
								30	13					5.3	Fully Threaded	Fine	Class 10.9	150,000	25	91052A103	00000
								40	13					5.3	Fully Threaded	Fine	Class 10.9	150,000	10	91052A104	00000




								M10 × 1.25 mm

								20	17					6.6	Fully Threaded	Fine	Class 10.9	150,000	10	90854A812	00000


								25	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	10	91052A105	00000
								30	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	10	91052A106	00000
								35	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	10	91052A107	00000
								40	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	10	91052A108	00000
								50	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	10	91052A109	00000
								60	17					6.4	Fully Threaded	Fine	Class 10.9	150,000	5	91052A111	00000




								M12 × 1.5 mm

								30	19					7.5	Fully Threaded	Fine	Class 10.9	150,000	10	91052A112	00000


								35	19	7.5	Fully Threaded			Fine	Class 10.9	150,000	10	91052A113	00000
								40	19	7.5	Fully Threaded			Fine	Class 10.9	150,000	5	91052A114	00000
								50	19	7.5	Fully Threaded			Fine	Class 10.9	150,000	5	91052A115	00000




										M12 × 1.25 mm

				30	19					7.5	Fully Threaded			Extra Fine	Class 10.9	150,000	10	91052A116	00000


				35	19					7.5	Fully Threaded			Extra Fine	Class 10.9	150,000	10	91052A117	00000
				40	19					7.5	Fully Threaded			Extra Fine	Class 10.9	150,000	5	91052A118	00000
				50	19					7.5	Fully Threaded			Extra Fine	Class 10.9	150,000	5	91052A119	00000




										M16 × 1.5 mm

										40	24			10	Fully Threaded	Fine	Class 10.9	150,000	5	91052A121	00000


						50				24	10			Fully Threaded	Fine	Class 10.9	150,000	5	91052A122	00000
						60	24			10	Fully Threaded			Fine	Class 10.9	150,000	1	91052A123	0000
						70	24			10	Fully Threaded			Fine	Class 10.9	150,000	1	91052A124	0000
						80	24			10	Fully Threaded			Fine	Class 10.9	150,000	1	91052A125	0000


						High-Strength Steel







												M8 × 1 mm

												16	13	5.5	Fully Threaded	Fine	Class 10.9	150,000	25	91310A511	0000


20	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	25	91310A512	0000
25	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	25	91310A513	0000
30	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	25	91310A514	0000
35	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	25	91310A515	0000
40	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	10	91310A516	0000
45	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	10	91310A517	0000
50	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	10	91310A518	0000
60	13											5.5	Fully Threaded	Fine	Class 10.9	150,000	10	91310A519	0000




												M10 × 1.25 mm

		20										17	6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A521	0000


		25	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A522	0000
		35	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A523	0000
		40	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A524	0000
		45	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A525	0000
		50	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A526	0000
		60	17									6.6	Fully Threaded	Fine	Class 10.9	150,000	10	91310A527	0000


		High-Strength Blue-Dyed Zinc-Plated Steel







												M8 × 1 mm

												20	13	5.5	Fully Threaded	Fine	Class 10.9	150,000	10	90180A915	00000


												25	13	5.5	Fully Threaded	Fine	Class 10.9	150,000	10	90180A916	00000
				30								13	5.5	Fully Threaded	Fine	Class 10.9	150,000	10	90180A917	00000




												M10 × 1.25 mm

												20	17	6.6	Fully Threaded	Fine	Class 10.9	150,000	5	90180A918	0000


												25	17	6.6	Fully Threaded	Fine	Class 10.9	150,000	5	90180A919	00000
												35	17	6.6	Fully Threaded	Fine	Class 10.9	150,000	5	90180A921	00000
												40	17	6.6	Fully Threaded	Fine	Class 10.9	150,000	5	90180A922	00000

Stainless Steel Hex Head Screws

Fully Threaded

Won't rust or corrode when exposed to moisture and chemicals. These screws have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

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 screws can.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel screws, these won't degrade when exposed to harsh weather, salt water, and most chemicals.

		Head, mm					Imported
	Lg., mm	Wd.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				M6 × 0.75 mm

				50	10	4	Fully Threaded	Fine	100,000	50	92314A798	000000




						M8 × 1 mm

						55	13	5.3	Fully Threaded	Fine	100,000	10	92314A799	00000


						60	13	5.3	Fully Threaded	Fine	100,000	10	92314A811	00000
						70	13	5.3	Fully Threaded	Fine	100,000	10	92314A812	00000
						80	13	5.3	Fully Threaded	Fine	100,000	10	92314A813	00000
						100	13	5.3	Fully Threaded	Fine	100,000	5	92314A814	00000




								M10 × 1.25 mm

								45	17	6.4	Fully Threaded	Fine	100,000	10	92314A815	00000


								50	17	6.4	Fully Threaded	Fine	100,000	5	92314A816	00000
								55	17	6.4	Fully Threaded	Fine	100,000	5	92314A817	00000
								60	17	6.4	Fully Threaded	Fine	100,000	5	92314A818	00000
								65	17	6.4	Fully Threaded	Fine	100,000	5	92314A819	00000
								70	17	6.4	Fully Threaded	Fine	100,000	5	92314A851	00000
								75	17	6.4	Fully Threaded	Fine	100,000	5	92314A852	00000
								80	17	6.4	Fully Threaded	Fine	100,000	5	92314A853	00000
								90	17	6.4	Fully Threaded	Fine	100,000	5	92314A854	00000
								100	17	6.4	Fully Threaded	Fine	100,000	5	92314A855	00000




										M12 × 1.5 mm

										16	19	7.5	Fully Threaded	Fine	100,000	10	92314A856	00000


										20	19	7.5	Fully Threaded	Fine	100,000	10	92314A857	00000
										25	19	7.5	Fully Threaded	Fine	100,000	10	92314A858	00000
										30	19	7.5	Fully Threaded	Fine	100,000	5	92314A859	00000
										35	19	7.5	Fully Threaded	Fine	100,000	5	92314A861	00000
										40	19	7.5	Fully Threaded	Fine	100,000	5	92314A862	00000
										45	19	7.5	Fully Threaded	Fine	100,000	5	92314A863	00000
										50	19	7.5	Fully Threaded	Fine	100,000	5	92314A864	00000
										55	19	7.5	Fully Threaded	Fine	100,000	5	92314A865	00000
										60	19	7.5	Fully Threaded	Fine	100,000	5	92314A866	00000
										65	19	7.5	Fully Threaded	Fine	100,000	5	92314A867	00000


										70	19	7.5	Fully Threaded	Fine	100,000	5	92314A868	00000
										75	19	7.5	Fully Threaded	Fine	100,000	1	92314A869	0000
80										19	7.5	Fully Threaded	Fine	100,000	1	92314A871	0000
90	19									7.5	Fully Threaded	Fine	100,000	1	92314A872	0000
100	19									7.5	Fully Threaded	Fine	100,000	1	92314A873	0000


Highly Corrosion-Resistant 316 Stainless Steel







				M8 × 1 mm

				16	13					5.3	Fully Threaded	Fine	100,000	25	93190A416	00000


				20	13					5.3	Fully Threaded	Fine	100,000	25	93190A417	00000
				25	13					5.3	Fully Threaded	Fine	100,000	10	93190A418	00000
				30	13					5.3	Fully Threaded	Fine	100,000	10	93190A419	00000
				35	13					5.3	Fully Threaded	Fine	100,000	10	93190A421	00000
				40	13					5.3	Fully Threaded	Fine	100,000	10	93190A422	00000
				50	13					5.3	Fully Threaded	Fine	100,000	10	93190A423	00000
				60	13					5.3	Fully Threaded	Fine	100,000	10	93190A424	00000




						M10 × 1.25 mm

						16	17			6.4	Fully Threaded	Fine	100,000	10	93190A425	00000


						20	17			6.4	Fully Threaded	Fine	100,000	10	93190A426	00000
						25	17			6.4	Fully Threaded	Fine	100,000	10	93190A427	00000
						30	17			6.4	Fully Threaded	Fine	100,000	10	93190A428	00000
						35	17			6.4	Fully Threaded	Fine	100,000	5	93190A429	00000
						40	17			6.4	Fully Threaded	Fine	100,000	5	93190A431	00000
						45	17			6.4	Fully Threaded	Fine	100,000	5	93190A432	00000
						50	17			6.4	Fully Threaded	Fine	100,000	5	93190A433	00000
						60	17			6.4	Fully Threaded	Fine	100,000	5	93190A434	00000




								M12 × 1.5 mm

								20	19	7.5	Fully Threaded	Fine	100,000	5	93190A435	00000


								25	19	7.5	Fully Threaded	Fine	100,000	5	93190A436	00000
								30	19	7.5	Fully Threaded	Fine	100,000	5	93190A437	00000
								35	19	7.5	Fully Threaded	Fine	100,000	5	93190A438	00000
								40	19	7.5	Fully Threaded	Fine	100,000	1	93190A439	0000
								45	19	7.5	Fully Threaded	Fine	100,000	1	93190A441	0000
								50	19	7.5	Fully Threaded	Fine	100,000	1	93190A442	0000
								55	19	7.5	Fully Threaded	Fine	100,000	1	93190A443	0000
								60	19	7.5	Fully Threaded	Fine	100,000	1	93190A444	0000