ASTM A574M Socket Head Screws

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100,000 psi or greater

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DFARS Specialty Metals

19 Products

Steel Socket Head Screws

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







				M3.5 × 0.6 mm

				6	6	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASME B18.3.1M, ASTM A574M	5	91290A304	00000


				8	6.2	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASTM A574M, DIN 912, ISO 4762	10	91290A381	00000
				10	6.2	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASTM A574M, DIN 912, ISO 4762	10	91290A382	00000
				12	6.2	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASTM A574M, DIN 912, ISO 4762	10	91290A383	00000
				16	6	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASME B18.3.1M, ASTM A574M	5	91290A305	0000
				20	6.2	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASTM A574M, DIN 912, ISO 4762	10	91290A384	00000
				25	6.2	3.5	Fully Threaded	Coarse	170,000	Class 12.9	ASTM A574M, DIN 912, ISO 4762	10	91290A385	00000

Steel Socket Head Screws with Flat Washer

Fully Threaded

Protect thin and soft surfaces from damage. A freely rotating washer sits between the head of these screws and your material to distribute pressure evenly. Made of alloy steel, these are some of our strongest screws. Their deep, six-point socket keeps hex keys from slipping out and damaging the drive.

Length is measured from under the head.

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







				M3 × 0.5 mm

				6	5.68	3	10	1.2	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A139	00000


				8	5.68	3	10	1.2	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A140	0000
				10	5.68	3	10	1.2	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A141	0000
				12	5.68	3	10	1.2	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A142	0000




						M4 × 0.7 mm

						6	7.22	4	12	1.4	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A143	0000


						8	7.22	4	12	1.4	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A144	0000
						10	7.22	4	12	1.4	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A145	0000
						12	7.22	4	12	1.4	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A146	0000




								M5 × 0.8 mm

								6	8.72	5	15	1.8	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A147	0000


								8	8.72	5	15	1.8	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A148	0000
								10	8.72	5	15	1.8	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A149	0000
								12	8.72	5	15	1.8	Fully Threaded	Coarse	170,000	ASTM A574M	1	90344A150	0000