1"-8 Socket Head Cap Screws

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72 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—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.

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

Zinc-Flake-Coated Alloy Steel—The coating is tested to extreme standards, including at least 700 hours of salt spray resistance, to hold up in wet and outdoor environments.

		Head
	Lg.	Dia.	Ht.	Threading	Thread Spacing	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				1"-8

				1 1/2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A909	000000


				1 3/4"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A911	00000
				2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A912	00000
				2 1/4"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A913	0000
				2 1/2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A914	0000
				2 3/4"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A915	0000
				3"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A916	0000
				3 1/4"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	91251A917	0000
				3 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A918	00000
				3 3/4"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A154	00000
				4"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A920	00000


				4 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A922	00000
				5"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A924	00000
				5 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A926	00000
				6"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A928	00000
				6 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A929	00000
				7"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A930	00000
				7 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A931	00000
				8"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A932	00000
				9"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A156	00000
				10"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A161	00000


				10 1/2"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A990	00000
				12"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A935	00000
				14"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A936	00000
				16"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A947	00000
				18"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A933	000000
				20"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	91251A946	000000


				Zinc-Plated Alloy Steel







								1"-8

								2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	90128A171	0000


								2 1/2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASTM A574	1	90128A173	00000
								3"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASME B18.3, ASTM A574	1	90128A980	00000
								4"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASME B18.3, ASTM A574	1	90128A985	00000
								5"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	90128A174	00000
								6"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASTM A574	1	90128A175	00000


Zinc-Flake-Coated Alloy Steel







								1"-8

								2"	1 1/2"	1"	Fully Threaded	Coarse	170,000	ASME B18.3, ASTM A574, ASTM B117	1	91274A197	0000


								3"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASME B18.3, ASTM A574, ASTM B117	1	91274A198	00000
								4"	1 1/2"	1"	Partially Threaded	Coarse	170,000	ASME B18.3, ASTM A574, ASTM B117	1	91274A199	00000

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







				1"-8

				2"	1 1/2"	1"	Fully Threaded	Coarse	70,000	ASME B18.3	1	92196A912	000000


				2 1/2"	1 1/2"	1"	Fully Threaded	Coarse	70,000	ASME B18.3	1	92196A914	00000
				2 3/4"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	90696A265	00000
				3"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A916	00000
				3 1/2"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A918	00000
				4"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A920	00000
				4 1/2"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A922	00000
				5"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A924	00000
				6"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A926	00000
				7"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	90696A268	00000
				8"	1 1/2"	1"	Partially Threaded	Coarse	70,000	ASME B18.3	1	92196A928	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								1"-8

								1 1/2"	1 1/2"	1"	Fully Threaded	Coarse	70,000	—	1	92185A382	00000


								2"	1 1/2"	1"	Fully Threaded	Coarse	70,000	—	1	92185A909	00000
								2 1/2"	1 1/2"	1"	Fully Threaded	Coarse	70,000	—	1	92185A911	00000
								2 3/4"	1 1/2"	1"	Partially Threaded	Coarse	70,000	—	1	92185A384	00000
								3"	1 1/2"	1"	Partially Threaded	Coarse	70,000	—	1	92185A913	00000
								3 1/2"	1 1/2"	1"	Partially Threaded	Coarse	70,000	—	1	92185A385	00000
								4"	1 1/2"	1"	Partially Threaded	Coarse	70,000	—	1	92185A916	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.

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

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







				1"-8

				1 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A979	000000


				2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A912	00000
				2 1/4"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASME B18.3, ASTM F835	1	90429A148	00000
				2 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A914	00000
				3"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A916	00000
				3 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A918	00000
				4"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A920	00000
				4 1/2"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A922	00000
				5"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A924	00000
				5 1/2"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A926	00000
				6"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A928	00000


				7"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASME B18.3, ASTM F835	1	90429A152	00000
				8"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A932	00000
				11 1/2"	82°	Standard	1.938"	0.54"	Partially Threaded	130,000	ASTM F835	1	91253A021	00000

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.

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

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

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







				1"-8

				3"	82°	Standard	1.938"	0.54"	Fully Threaded	70,000	ASME B18.3	—	1	92210A467	000000


				3 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	70,000	ASME B18.3	Material Certificate	1	92210A468	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								1"-8

								2"	82°	Standard	1.938"	0.54"	Fully Threaded	70,000	ASME B18.3	Material Certificate	1	90585A079	00000


								2 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	70,000	ASME B18.3	—	1	90585A081	00000