M20 Socket Head Cap Screws

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109 Products

Steel Socket Head Screws

Fully Threaded

Partially Threaded

Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.

Length is measured from under the head.

Black-Oxide Alloy Steel—Best for dry environments since moisture will cause these screws to rust. They have a dark, matte appearance.

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

		Head, mm
	Lg., mm	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M20 × 1.5 mm

				50	30	20	Fully Threaded	Extra Fine	170,000	Class 12.9	1	96144A343	00000


				60	30	20	Partially Threaded	Extra Fine	170,000	Class 12.9	1	96144A344	0000
				80	30	20	Partially Threaded	Extra Fine	170,000	Class 12.9	1	96144A345	0000
				100	30	20	Partially Threaded	Extra Fine	170,000	Class 12.9	1	96144A346	0000




						M20 × 2.5 mm

						25	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A131	0000


						30	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A061	00000
						35	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A132	0000
						40	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A063	00000
						45	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A065	00000
						50	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A850	00000
						55	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A851	00000
						60	30	20	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A852	00000
						65	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A853	0000
						70	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A854	0000
						75	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A855	0000


						80	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A856	0000
						85	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A133	0000
						90	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A245	0000
						90	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A067	0000
						100	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A246	0000
						100	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A069	0000
						110	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A070	0000
						120	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A072	0000
						130	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A074	0000
						140	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A076	0000


						150	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A078	0000
						160	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A080	0000
						180	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A082	0000
						200	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A084	0000
						220	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A086	0000
						240	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A089	0000
						260	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A088	00000
						300	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A090	00000
						320	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A146	00000
						340	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A161	00000


						360	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A147	00000
						400	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A149	00000


Blue-Dyed Zinc-Plated Alloy Steel







						M20 × 2.5 mm

						40	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91502A291	0000


						50	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91502A292	0000
						60	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91502A293	0000
						70	30	20	Fully Threaded	Coarse	170,000	Class 12.9	1	91502A294	0000
						80	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91502A295	0000
						100	30	20	Partially Threaded	Coarse	170,000	Class 12.9	1	91502A296	0000

Stainless Steel Socket Head Screws

Fully Threaded

Partially Threaded

These screws won't rust or corrode when exposed to moisture and chemicals. Their deep, six-point socket keeps hex keys from slipping out and damaging 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 screws won't degrade when exposed to harsh weather, salt water, and most chemicals.

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







				M20 × 2.5 mm

				30	30	20	Fully Threaded	Coarse	70,000	1	91292A274	00000


				35	30	20	Fully Threaded	Coarse	70,000	1	90696A128	0000
				40	30	20	Fully Threaded	Coarse	70,000	1	91292A750	0000
				45	30	20	Fully Threaded	Coarse	70,000	1	90696A129	0000
				50	30	20	Fully Threaded	Coarse	70,000	1	91292A760	0000
				55	30	20	Fully Threaded	Coarse	70,000	1	90696A131	0000
				60	30	20	Fully Threaded	Coarse	70,000	1	91292A765	0000
				70	30	20	Fully Threaded	Coarse	70,000	1	91292A770	0000
				80	30	20	Partially Threaded	Coarse	70,000	1	91292A775	0000
				90	30	20	Partially Threaded	Coarse	70,000	1	91292A785	0000
				100	30	20	Partially Threaded	Coarse	70,000	1	91292A275	0000


				110	30	20	Partially Threaded	Coarse	70,000	1	90696A132	0000
				120	30	20	Partially Threaded	Coarse	70,000	1	91292A276	0000
				130	30	20	Partially Threaded	Coarse	70,000	1	90696A133	00000
				140	30	20	Partially Threaded	Coarse	70,000	1	90696A134	00000
				150	30	20	Partially Threaded	Coarse	70,000	1	90696A135	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								M20 × 2.5 mm

								40	30	20	Fully Threaded	Coarse	70,000	1	92290A841	00000


								50	30	20	Fully Threaded	Coarse	70,000	1	92290A842	00000
								60	30	20	Fully Threaded	Coarse	70,000	1	92290A843	00000
								80	30	20	Partially Threaded	Coarse	70,000	1	92290A844	00000

Low-Profile Steel Socket Head Screws with Pilot Recess

Hex with Pilot

Recess

For extra gripping power, these low-profile screws have a pilot recess in the hex drive. Fasten them with an extended-tip L-key (sold separately). You can also tighten them with a standard L-key, but it won't grip the hex drive as securely. With a screw head that's about half the size of standard-profile ones, these screws are less likely to snag components. However, they aren't as strong as alloy steel ones with larger heads.

Length is measured from under the head.

Black-Oxide Alloy Steel—Best for dry environments since moisture will cause these screws to rust. They have a dark, matte appearance.

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

		Head, mm
	Lg., mm	Dia.	Ht.	Pilot Recess Dia., mm	Threading	Thread Spacing	Tensile Strength, psi	Fastener Strength Grade/Class		Each
Black-Oxide Alloy Steel







				M20 × 2.5 mm

				40	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A202	00000


				40	30	12	10	Partially Threaded	Coarse	150,000	Class 10.9	97050A339	00000
				45	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A203	00000
				50	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A204	0000
				50	30	12	10	Partially Threaded	Coarse	150,000	Class 10.9	97050A341	0000
				60	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A205	0000
				60	30	12	10	Partially Threaded	Coarse	150,000	Class 10.9	97050A342	0000
				70	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A206	00000
				70	30	12	10	Partially Threaded	Coarse	150,000	Class 10.9	97050A343	00000
				80	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A207	00000
				90	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A208	00000


				100	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A198	0000
				110	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A199	00000
				120	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A201	00000


				Zinc-Plated Alloy Steel







								M20 × 2.5 mm

								40	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A292	00000


								45	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A293	00000
								50	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A294	00000
								60	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A295	00000
								70	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A296	00000
								80	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A297	00000
								90	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A298	00000
								100	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A299	00000
								110	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A301	00000
								120	30	12	10	Partially Threaded	Coarse	110,000	Class 8.8	97050A302	00000

Steel Hex-Drive Flat Head Screws

Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.

Length is measured from the top of 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.

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

				Head, mm
	Lg., mm	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M20 × 2.5 mm

				35	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A595	00000


				40	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A514	0000
				45	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A596	0000
				50	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A518	0000
				55	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A597	0000
				60	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A522	0000
				70	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A526	0000
				80	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	—	1	91294A530	0000
				90	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	—	1	91294A532	0000
				100	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	—	1	91294A534	0000
				110	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A599	0000


				120	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991, ISO 10642	—	1	91294A611	0000
				130	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	—	1	91294A563	00000
				140	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	Material Certificate	1	91294A564	00000
				160	90°	Standard	36	8.5	Fully Threaded	120,000	DIN 7991	—	1	91294A566	00000

Low-Profile Steel Socket Head Screws

Fully Threaded

With a head approximately half the height of standard-profile ones, these screws are less likely to snag on components. However, they aren't as strong as screws with larger heads. Tighten with a hex key.

Length is measured from under the head.

Black-Oxide Alloy Steel—Best for dry environments since moisture will cause these screws to rust. They have a dark, matte appearance.

		Head, mm
	Lg., mm	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M20 × 2.5 mm

				40	30	11	Fully Threaded	Coarse	110,000	Class 8.8	1	93070A291	00000


				50	30	11	Fully Threaded	Coarse	110,000	Class 8.8	1	93070A293	0000

Stainless Steel Hex-Drive Flat Head Screws

The most corrosion-resistant hex-drive flat head screws we offer. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals, but they're not as strong as alloy steel. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.

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.

				Head, mm
	Lg., mm	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				M20 × 2.5 mm

				40	90°	Standard	36	8.5	Fully Threaded	70,000	DIN 7991	Material Certificate	1	92125A531	00000


				45	90°	Standard	36	8.5	Fully Threaded	70,000	DIN 7991, ISO 10642	—	1	92125A628	00000
				50	90°	Standard	36	8.5	Fully Threaded	70,000	DIN 7991	—	1	92125A532	0000
				70	90°	Standard	36	8.5	Partially Threaded	70,000	DIN 7991, ISO 10642	—	1	92125A629	00000
				80	90°	Standard	36	8.5	Partially Threaded	70,000	DIN 7991, ISO 10642	—	1	92125A631	00000