ASTM A276 Flat Head Screws

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Chemical Resistant

Highly Corrosion Resistant

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Fully Threaded

Tensile Strength

70,000 psi to 99,999 psi

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Rockwell B70

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29 Products

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.

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.

Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these screws will hold up in just about any environment, including salt water and most chemicals.

Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.

				Head, mm
	Lg., mm	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel







				M10 × 1.5 mm

				16	100°	Undercut	20	3.5	Fully Threaded	70,000	ASTM A276	—	1	90729A617	000000


				25	100°	Undercut	20	3.5	Fully Threaded	70,000	ASTM A276	—	1	90729A619	00000
				30	100°	Undercut	20	3.5	Fully Threaded	70,000	ASTM A276	Material Certificate	1	90729A621	00000
				35	100°	Undercut	20	3.5	Fully Threaded	70,000	ASTM A276	Material Certificate	1	90729A622	00000
				50	100°	Undercut	20	3.5	Fully Threaded	70,000	ASTM A276	Material Certificate	1	90729A624	00000




						M12 × 1.75 mm

						25	100°	Undercut	24	4.2	Fully Threaded	70,000	ASTM A276	—	1	90729A628	00000


						30	100°	Undercut	24	4.2	Fully Threaded	70,000	ASTM A276	—	1	90729A629	00000
						35	100°	Undercut	24	4.2	Fully Threaded	70,000	ASTM A276	Material Certificate	1	90729A631	00000


						Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel







										M3 × 0.5 mm

										5	100°	Undercut	6	1.3	Fully Threaded	70,000	ASTM A276	—	1	95440A101	0000


										6	100°	Undercut	6	1.3	Fully Threaded	70,000	ASTM A276	—	1	95440A102	0000
										8	100°	Undercut	6	1.3	Fully Threaded	70,000	ASTM A276	—	1	95440A103	0000
										10	100°	Undercut	6	1.3	Fully Threaded	70,000	ASTM A276	—	1	95440A104	0000
										12	100°	Undercut	6	1.3	Fully Threaded	70,000	ASTM A276	—	1	95440A105	0000




												M4 × 0.7 mm

												6	100°	Undercut	8	1.6	Fully Threaded	70,000	ASTM A276	—	1	95440A106	0000


												8	100°	Undercut	8	1.6	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A107	0000
												10	100°	Undercut	8	1.6	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A108	0000
												12	100°	Undercut	8	1.6	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A109	0000
												16	100°	Undercut	8	1.6	Fully Threaded	70,000	ASTM A276	—	1	95440A110	0000




														M5 × 0.8 mm

8	100°													Undercut	10	1.9	Fully Threaded	70,000	ASTM A276	—	1	95440A111	0000


10	100°													Undercut	10	1.9	Fully Threaded	70,000	ASTM A276	—	1	95440A112	0000
12	100°	Undercut												10	1.9	Fully Threaded	70,000	ASTM A276	—	1	95440A113	0000
16	100°	Undercut	10											1.9	Fully Threaded	70,000	ASTM A276	—	1	95440A114	0000




		M6 × 1 mm

		12	100°											Undercut	12	2.2	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A116	0000


		16	100°											Undercut	12	2.2	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A117	0000
		20	100°											Undercut	12	2.2	Fully Threaded	70,000	ASTM A276	—	1	95440A118	0000
		30	100°											Undercut	12	2.2	Fully Threaded	70,000	ASTM A276	Material Certificate	1	95440A120	00000




				M8 × 1.25 mm

				16	100°									Undercut	16	2.8	Fully Threaded	70,000	ASTM A276	—	1	95440A121	0000


				20	100°									Undercut	16	2.8	Fully Threaded	70,000	ASTM A276	—	1	95440A122	0000
				25	100°									Undercut	16	2.8	Fully Threaded	70,000	ASTM A276	—	1	95440A123	00000