ASTM F879 Flat Head Screws

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70,000 psi to 99,999 psi

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Unified Standard Class 3A

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MIL-DTL-18240

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210 Products

Performance

Vibration Resistant

Keep parts from coming loose on machinery with mild vibration

40 products

Chemical Resistant

Won't degrade when exposed to most chemicals

60 products

Application

Venting

Prevent the buildup of pressure or vacuum in sealed spaces

54 products

Flat Head Profile

Standard

The most common head profile for flat head screws

208 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.

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.

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







				1-64

				3/16"	82°	Standard	0.168"	0.054"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000


				1/4"	82°	Standard	0.168"	0.054"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
				3/8"	82°	Standard	0.168"	0.054"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000




						4-40

						3/16"	82°	Undercut	0.255"	0.047"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	0000


						9/16"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	0000
						7/8"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	0000
						2"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000




								6-32

								11/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	0000


								1 3/8"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	00000




										8-32

										9/16"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	0000


										11/16"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	00000
										1 1/8"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
										1 3/8"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
										2 1/2"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
										3"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000




												10-24

												7/16"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	00000


												9/16"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	00000
												11/16"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
												1 1/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
												1 3/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
												2 1/4"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000




												10-32

		9/16"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	000000000	00000


		11/16"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
		1 1/8"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
		1 3/8"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
		1 5/8"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
		2 1/4"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000
		3 1/2"	82°									Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000




				1/4"-20

				7/16"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000


				9/16"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	0000
				11/16"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
				1 3/8"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
				1 5/8"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000
				1 7/8"	82°							Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000
				2 3/4"	82°	Standard						0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	00000
				3 1/4"	82°	Standard	0.531"					0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	00000
				5"	82°	Standard	0.531"					0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
				6"	82°	Standard	0.531"					0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
				7"	82°	Standard	0.531"					0.161"	Partially Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	00000




						5/16"-18

						7/16"	82°	Standard				0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000


						9/16"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
						1 3/8"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						1 5/8"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						1 7/8"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						3 1/4"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	00000
						4 1/2"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
						5"	82°	Standard	0.656"			0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000




								3/8"-16

								1 1/8"	82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000


								1 3/8"	82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
								1 5/8"	82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
								1 7/8"	82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
								3 1/4"	82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000




	1/2"-13

	7/8"								82°	Standard	0.938"	0.251"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000


	1 7/8"								82°	Standard	0.938"	0.251"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000
	2 3/4"								82°	Standard	0.938"	0.251"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	0000
	3 1/4"								82°	Standard	0.938"	0.251"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	0000


	Highly Corrosion-Resistant 316 Stainless Steel







										2-56

										5/16"	82°	Standard	0.197"	0.064"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000


										3/8"	82°	Standard	0.197"	0.064"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000
										1/2"	82°	Standard	0.197"	0.064"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	000000000	00000




												4-40

												1/8"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000


												7/16"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
				7/8"								82°	Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
				1"	82°							Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
				1 1/4"	82°							Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
				1 1/2"	82°							Standard	0.255"	0.083"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000




												5-40

												1/4"	82°	Standard	0.281"	0.09"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000


												3/8"	82°	Standard	0.281"	0.09"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
												1/2"	82°	Standard	0.281"	0.09"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000




												6-32

												3/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000


												5/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
												7/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
												9/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
												5/8"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
3/4"												82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
7/8"								82°				Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
1"								82°				Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
1 1/4"								82°				Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
1 1/2"								82°				Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000
2"								82°				Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	00000




												6-40

	1/4"											82°	Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000


	3/8"								82°			Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
	1/2"								82°			Standard	0.307"	0.097"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000




			8-32

			3/16"						82°			Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000


			7/16"						82°			Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			9/16"						82°			Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			7/8"						82°			Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			1 1/8"						82°	Standard		0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			1 1/4"						82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			1 1/2"						82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			2"						82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
			2 1/2"						82°	Standard	0.359"	0.112"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000




										10-24

										7/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000


				1 1/4"						82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
				1 1/2"	82°					Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000




										10-32

										1/4"	82°	Undercut	0.411"	0.089"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000


						5/16"				82°	Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	000000000	0000
						7/16"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						7/8"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						1 1/8"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						1 3/8"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						1 3/4"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						2"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						2 1/2"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000
						3"	82°			Standard	0.411"	0.127"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	00000




										1/4"-20

										9/16"	82°	Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000


5"										82°	Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
6"										82°	Standard	0.531"	0.161"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000




										5/16"-18

										1 3/4"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	00000


	5"									82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	0000




										5/16"-24

										5/8"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	000000000	0000


										3/4"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
										1"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	0000
										1 1/2"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000
										2"	82°	Standard	0.656"	0.198"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	000000000	00000




									3/8"-16

									4 1/2"		82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	0000


									5"		82°	Standard	0.781"	0.234"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	000000000	0000

Venting Stainless Steel Hex-Drive Flat Head Screws

Prevent the buildup of pressure or vacuum in sealed spaces. These screws have a hole drilled through their center that lets air, fluid, and gases escape. They're often used to release trapped gases and equalize pressure caused by high temperatures in coating, curing, and heating applications. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals. 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.

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	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				2-56

				3/16"	82°	Standard	0.197"	0.064"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000


				1/4"	82°	Standard	0.197"	0.064"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
				3/8"	82°	Standard	0.197"	0.064"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
				1/2"	82°	Standard	0.197"	0.064"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




						4-40

						1/4"	82°	Standard	0.255"	0.083"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


						5/16"	82°	Standard	0.255"	0.083"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
						3/8"	82°	Standard	0.255"	0.083"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
						1/2"	82°	Standard	0.255"	0.083"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000




								6-32

								1/4"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


								3/8"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
								1/2"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
								5/8"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
								3/4"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
								1"	82°	Standard	0.307"	0.097"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




										8-32

										3/8"	82°	Standard	0.359"	0.112"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


										1/2"	82°	Standard	0.359"	0.112"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
										5/8"	82°	Standard	0.359"	0.112"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
										3/4"	82°	Standard	0.359"	0.112"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
										1"	82°	Standard	0.359"	0.112"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




												10-24

												3/8"	82°	Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


												1/2"	82°	Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
5/8"												82°	Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
3/4"	82°											Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
1"	82°											Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




		10-32

		3/8"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


		1/2"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
		5/8"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
		3/4"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
		1"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
		1 1/4"	82°									Standard	0.411"	0.127"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
		1 1/2"	82°									Standard	0.411"	0.127"	Partially Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




				1/4"-20

				3/8"	82°							Standard	0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000


				1/2"	82°							Standard	0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	0000
				5/8"	82°							Standard	0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
				3/4"	82°							Standard	0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
				1"	82°							Standard	0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	5	000000000	00000
				1 1/4"	82°	Standard						0.531"	0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
				1 1/2"	82°	Standard	0.531"					0.161"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
				2"	82°	Standard	0.531"					0.161"	Partially Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




						5/16"-18

						1/2"	82°					Standard	0.656"	0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000


						5/8"	82°					Standard	0.656"	0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
						3/4"	82°					Standard	0.656"	0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
						1"	82°					Standard	0.656"	0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
						1 1/4"	82°	Standard				0.656"	0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
						1 1/2"	82°	Standard	0.656"			0.198"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




								3/8"-16

								3/4"	82°			Standard	0.781"	0.234"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000


								1"	82°			Standard	0.781"	0.234"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
								1 1/4"	82°			Standard	0.781"	0.234"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
								1 1/2"	82°			Standard	0.781"	0.234"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000




										1/2"-13

										1"	82°	Standard	0.938"	0.251"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000


1 1/4"										82°	Standard	0.938"	0.251"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
1 1/2"	82°									Standard	0.938"	0.251"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
1 3/4"	82°									Standard	0.938"	0.251"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	0000
2"	82°									Standard	0.938"	0.251"	Fully Threaded	Not Rated	ASME B18.3, ASTM F879	1	000000000	00000

Thread-Locking Stainless Steel Hex-Drive Flat Head Screws

Keep parts in place and screws free of corrosion on motors and other machinery that experience mild vibration. These screws have nylon-patch threadlocker bonded to the threads, saving you the time and mess of adding it yourself. 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.

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

Military Specification—These screws are manufactured and tested to meet strict U.S. military standards for material and construction.

				Head
	Lg.	Countersink Angle	Flat Head Profile	Dia.	Ht.	Threading	Tensile Strength, psi	Threadlocker Type	Threadlocker Temp. Range, ° F	Specs. Met	Mil. Spec.	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				4-40

				3/16"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	000000


				1/4"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	000000000	00000
				5/16"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
				3/8"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	000000000	00000
				1/2"	82°	Standard	0.255"	0.083"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	0000




						6-32

						1/4"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	000000000	00000


						5/16"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	0000
						3/8"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	000000000	00000
						1/2"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	0000
						5/8"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	0000
						3/4"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
						1"	82°	Standard	0.307"	0.097"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000




								8-32

								1/4"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000


								5/16"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
								3/8"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
								1/2"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
								5/8"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
								3/4"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
								1"	82°	Standard	0.359"	0.112"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000




										10-24

										3/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000


										1/2"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
										5/8"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	0000
										3/4"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
										1"	82°	Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000




												10-32

3/8"	82°											Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000


1/2"	82°											Standard	0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
5/8"	82°	Standard										0.411"	0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
3/4"	82°	Standard	0.411"									0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
1"	82°	Standard	0.411"									0.127"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000




		1/4"-20

		3/8"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000


		1/2"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
		5/8"	82°									Standard	0.531"	0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000
		3/4"	82°	Standard								0.531"	0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
		1"	82°	Standard	0.531"							0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	000000000	00000
		1 1/4"	82°	Standard	0.531"							0.161"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	000000000	00000




				5/16"-18

				3/4"	82°							Standard	0.656"	0.198"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	000000000	0000


				1"	82°							Standard	0.656"	0.198"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	000000000	00000




						3/8"-16

						3/4"	82°					Standard	0.781"	0.234"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	000000000	00000


						1"	82°					Standard	0.781"	0.234"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	000000000	00000
						1 1/4"	82°					Standard	0.781"	0.234"	Fully Threaded	70,000	Nylon Patch	-65 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	000000000	00000