M18 Thread Socket Head Screws

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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.

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







				M18 × 2.5 mm

				30	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A030	000000


				35	27	18	Fully Threaded	Coarse	170,000	Class 12.9	1	91290A029	0000
				40	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A032	00000
				45	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A034	00000
				50	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A036	00000
				55	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A038	00000
				60	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A040	00000
				65	27	18	Fully Threaded	Coarse	170,000	Class 12.9	5	91290A042	00000
				70	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A044	0000
				80	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A048	0000
				90	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A050	0000


				100	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A052	0000
				110	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A054	0000
				120	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A056	0000
				130	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A058	0000
				140	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A060	0000
				150	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A062	0000
				160	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A064	0000
				180	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A066	0000
				200	27	18	Partially Threaded	Coarse	170,000	Class 12.9	1	91290A068	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.

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







				M18 × 2.5 mm

				30	27	18	Fully Threaded	Coarse	70,000	1	90696A115	00000


				40	27	18	Fully Threaded	Coarse	70,000	1	90696A116	00000
				50	27	18	Fully Threaded	Coarse	70,000	1	90696A117	00000
				70	27	18	Partially Threaded	Coarse	70,000	1	90696A119	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	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				M18 × 2.5 mm

				40	90°	Standard	33	8	Fully Threaded	120,000	5	91294A558	000000


				50	90°	Standard	33	8	Fully Threaded	120,000	5	91294A559	00000
				60	90°	Standard	33	8	Fully Threaded	120,000	5	91294A560	00000
				80	90°	Standard	33	8	Fully Threaded	120,000	1	91294A593	0000

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.

	Pkg. Qty.		Pkg.
Alloy Steel







	M18 × 2.5 mm

	20	10	Rockwell C45	1	91390A633	00000


	25	10	Rockwell C45	1	91390A634	00000