1"-14 Thread Socket Head Screws

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Unified Standard Class 3A

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23 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.

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







				1"-14

				2"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A416	00000


				2 1/4"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A417	00000
				2 1/2"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A009	00000
				2 3/4"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A418	00000
				3"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A419	00000
				3 1/4"	1 1/2"	1"	Fully Threaded	Fine	170,000	1	91251A765	00000
				3 1/2"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A320	00000
				4"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A321	00000
				4 1/2"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A322	00000
				5"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A323	00000
				5 1/2"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A324	00000


				6"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A325	00000
				7"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A326	00000
				8"	1 1/2"	1"	Partially Threaded	Fine	170,000	1	91251A331	00000

Steel Cup-Tip Set Screws

Made of alloy steel, these screws are strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







	1"-14

	1"	9/16"	Rockwell C45	ASME B18.3, ASTM F912	1	91375A517	000000


	1 1/2"	9/16"	Rockwell C45	ASME B18.3, ASTM F912	1	91375A927	00000
	2"	9/16"	Rockwell C45	ASME B18.3, ASTM F912	1	91375A929	00000
	2 1/2"	9/16"	Rockwell C45	ASME B18.3, ASTM F912	1	91375A520	00000
	3"	9/16"	Rockwell C45	ASME B18.3, ASTM F912	1	91375A523	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"-14

				2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A980	000000


				2 1/2"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A981	00000
				3"	82°	Standard	1.938"	0.54"	Fully Threaded	130,000	ASTM F835	1	91253A982	00000

Steel Hollow-Tip Set Screws

Screw Used to Adjust

Spring Tension

Image of Product. Front orientation. Set Screws. Steel Hollow-Tip Set Screws.

Thread these screws over a pin or another set screw to lock it in place, or over a spring to adjust tension. You can also peek through the hollow center to inspect locked parts. Made of alloy steel, these screws are strong enough to hold components without wearing down. Also known as jam set screws.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Lg.	Drive Size	Hardness	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel



	1"-14	1/2"	9/16"	Rockwell C45	1	91301A220	00000