ASTM F879 Rounded Head Screws

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Unified Standard Class 3A

Tensile Strength

60,000 psi to 79,999 psi

80,000 psi to 99,999 psi

DFARS Specialty Metals

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

EAR99

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263 Products

Performance

Vibration Resistant

Keep parts from coming loose on machinery with movement and vibration

74 products

Chemical Resistant

Maintain their strength when exposed to most chemicals

93 products

Locking Type

Threadlocker

Threadlocker is bonded to threads to keep parts in place during mild vibration

74 products

Drive Style

Hex

Six contact points securely grip your driver without stripping the drive

248 products

Stainless Steel Button Head Hex-Drive Screws

These button head screws won't corrode from moisture and chemicals, but they aren't as strong as alloy steel screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver.

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 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.

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







				4-40

				9/16"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A811	00000


				1 1/8"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A812	0000
				1 3/8"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A813	0000
				1 3/4"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A814	0000
				2"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A415	00000




						6-32

						9/16"	0.262"	0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A815	0000


						1 1/8"	0.262"	0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A816	00000
						2 1/2"	0.262"	0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A817	00000
						3"	0.262"	0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A818	0000




								8-32

								9/16"	0.312"	0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A819	0000


								1 1/8"	0.312"	0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A820	0000
								2 1/2"	0.312"	0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A821	00000
								3"	0.312"	0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A423	00000




										10-24

										7/16"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	92949A822	0000


										1 1/8"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A823	00000
										1 3/8"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A824	00000
										2 1/4"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A825	0000
										4"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A431	00000




												10-32

												1 1/8"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A826	00000


												1 3/8"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A827	00000
												1 5/8"	0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A828	00000
2 1/4"												0.361"	0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A829	0000
3 1/2"	0.361"											0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A830	0000
4"	0.361"											0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A831	0000




		12-24

		1"	0.378"									0.12"	Fully Threaded	70,000	ASTM F879	50	92949A433	00000




												1/4"-20

												1/4"	0.437"	0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A832	0000


				7/16"								0.437"	0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A833	0000
				9/16"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A834	0000
				1 1/8"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A835	00000
				1 3/8"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A836	0000
				1 5/8"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A837	0000
				1 7/8"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A838	00000
				3 1/4"	0.437"							0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A438	0000




												1/4"-28

						5/16"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A840	0000


						7/16"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A841	00000
						9/16"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	92949A842	00000
						7/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A843	0000
						1 1/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A844	00000
						1 3/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A845	0000
						1 5/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A846	0000
						1 3/4"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A847	0000
						2 1/2"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A848	0000
						3"	0.437"	0.132"				Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A849	0000
						3 1/2"	0.437"	0.132"	Fully Threaded			70,000	ASME B18.3, ASTM F879	10	92949A850	00000


						4"	0.437"	0.132"	Fully Threaded			70,000	ASME B18.3, ASTM F879	10	92949A851	00000




								5/16"-18

								7/16"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A852	0000


								9/16"	0.547"	0.166"		Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A853	0000
								1 1/8"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	92949A854	00000
								1 5/8"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A855	0000
								1 7/8"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A856	0000
								2 3/4"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A857	00000
								3 1/4"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A858	0000
								5"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A444	00000
								6"	0.547"	0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A445	00000




5/16"-24

7/8"	0.547"									0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A859	0000


1 1/8"	0.547"									0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A860	0000
1 3/8"	0.547"									0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A861	0000
1 3/4"	0.547"									0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A862	00000
2 1/2"	0.547"	0.166"								Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A863	0000
3"	0.547"	0.166"	Fully Threaded							70,000	ASME B18.3, ASTM F879	5	92949A864	0000
3 1/2"	0.547"	0.166"	Fully Threaded							70,000	ASME B18.3, ASTM F879	5	92949A865	0000
4"	0.547"	0.166"	Fully Threaded							70,000	ASME B18.3, ASTM F879	5	92949A866	00000




		3/8"-16

		1 1/8"	0.656"							0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A867	0000


		1 3/8"	0.656"							0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A868	0000
		1 5/8"	0.656"							0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A869	00000
		1 7/8"	0.656"							0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	92949A870	00000
		4 1/2"	0.656"							0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A871	00000
		6"	0.656"	0.199"						Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A872	0000




				3/8"-24

				1 3/4"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A873	0000


				2"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A874	0000
				2 1/2"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A875	0000
				3"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A876	00000




										1/2"-13

										7/8"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A877	0000


										2 1/4"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A878	00000
						2 3/4"				0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A879	0000
						3 1/4"	0.875"			0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A880	0000




										1/2"-20

										7/8"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A882	0000


										1 3/4"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	92949A883	00000
										2"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A884	0000
										2 1/2"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A885	0000
										3"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	92949A886	0000


								Highly Corrosion-Resistant 316 Stainless Steel







												1-72

												1/8"	0.139"	0.039"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A611	0000


3/16"												0.139"	0.039"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A612	0000
1/4"	0.139"											0.039"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A613	0000




												2-56

												1/2"	0.164"	0.046"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A511	0000


												5/8"	0.164"	0.046"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A512	00000




												4-40

												1 1/4"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A624	0000


												1 1/2"	0.213"	0.059"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A625	0000




				6-32

				1/4"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	98164A106	00000


				3/8"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	100	98164A107	00000
				1/2"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A111	0000
				3/4"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A115	00000
				1"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A119	00000
				2"	0.262"									0.073"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A636	00000




						8-32

						1/4"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A133	0000


						3/8"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A134	0000
						1/2"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	50	98164A135	0000
						3/4"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A139	0000
						7/8"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A647	0000
						1"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A143	00000
						1 3/4"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A648	0000
						2"	0.312"							0.087"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A649	00000




								10-24

								3/8"	0.361"					0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A152	0000


								1/2"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	25	98164A154	0000
								5/8"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	25	98164A156	00000
								3/4"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	25	98164A158	00000
								1"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	25	98164A162	00000
								1 3/4"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	10	98164A650	0000




								10-32

								1/4"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	50	98164A176	0000


								3/8"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	50	98164A177	0000
								1/2"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	50	98164A178	0000
								5/8"	0.361"	0.101"	Fully Threaded			70,000	ASME B18.3, ASTM F879	25	98164A180	0000
		3/4"						0.361"	0.101"	Fully Threaded	70,000			ASME B18.3, ASTM F879	25	98164A182	00000
		7/8"	0.361"					0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879			25	98164A661	00000
		1"	0.361"					0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879			25	98164A186	00000
		1 3/4"	0.361"					0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879			10	98164A662	0000
		3"	0.361"					0.101"	Fully Threaded	70,000	ASME B18.3, ASTM F879			10	98164A663	00000




								12-24

								1/2"	0.413"	0.114"	Fully Threaded			70,000	ASTM F879	25	98164A513	0000


								3/4"	0.413"	0.114"	Fully Threaded			70,000	ASTM F879	25	98164A514	00000
								1"	0.413"	0.114"	Fully Threaded	70,000		ASTM F879	25	98164A515	00000




										1/4"-20

										1/4"	0.437"	0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A516	0000


				5/16"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A517	0000
				3/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A209	00000
				7/16"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A518	0000
				1/2"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A211	0000
				5/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A212	0000
				3/4"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A213	00000
				7/8"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A519	00000
				1"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A214	00000
				1 1/4"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A218	0000
				1 1/2"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A222	00000


				6"	0.437"					0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A674	0000




						1/4"-28

						3/8"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A520	0000


						1/2"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A521	0000
						3/4"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A522	00000
						1"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	25	98164A523	00000
						1 1/4"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A685	0000
						1 1/2"	0.437"			0.132"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A686	0000




						5/16"-18

						1/2"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A266	0000


						5/8"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A524	0000
						3/4"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A267	0000
						7/8"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A525	0000
						1"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A268	0000
						1 1/8"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A526	0000
						1 1/4"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A272	0000
						1 3/8"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A527	0000
						1 1/2"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A276	0000




						5/16"-24

						1/2"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A528	0000


						3/4"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A529	0000
						1"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A530	0000
						1 1/4"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A531	0000
						1 1/2"	0.547"			0.166"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A532	0000




								3/8"-16

								3/4"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A303	00000


								7/8"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A533	00000
								1"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A304	00000
								1 1/8"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A534	0000
								1 3/8"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A535	0000
								1 1/2"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A306	0000
								3 1/2"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A710	00000
								4"	0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A711	00000




										3/8"-24

				3/4"						0.656"	0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A536	00000


				1"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	10	98164A537	00000
				1 1/4"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A538	0000
				1 1/2"	0.656"					0.199"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A539	0000




										1/2"-13

										3/4"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A540	0000


1"	0.875"									0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A541	00000
1 1/4"	0.875"									0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A722	00000
1 3/4"	0.875"									0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A542	0000
2 1/2"	0.875"									0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A543	0000
3"	0.875"									0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A544	0000




										1/2"-20

										3/4"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A545	00000


										1"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	5	98164A546	00000
										1 1/4"	0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A547	0000
		1 1/2"								0.875"	0.265"	Fully Threaded	70,000	ASME B18.3, ASTM F879	1	98164A548	0000

Stainless Steel Button Head Torx Screws

Our most corrosion-resistant button head Torx screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With a deep six-lobe opening, the Torx drive prevents your driver from slipping and stripping the drive. Also known as star drives, they withstand more torque than slotted, Phillips, and hex drives.

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 can.

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







				6-32

				1 1/2"	0.262"	0.073"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A040	00000




						8-32

						5/16"	0.312"	0.087"	Fully Threaded	60,000	ASME B18.3, ASTM F879	100	90600A224	0000


						1 1/4"	0.312"	0.087"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A246	00000
						1 1/2"	0.312"	0.087"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A305	00000




								10-24

								3/8"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	100	90600A398	00000


								1/2"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	100	90600A450	00000
								3/4"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A455	0000
								1"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A493	00000
								1 1/2"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A558	00000




										10-32

										1"	0.361"	0.101"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A594	00000




												1/4"-20

												1/4"	0.437"	0.132"	Fully Threaded	60,000	ASME B18.3, ASTM F879	50	90600A625	0000


												2"	0.437"	0.132"	Fully Threaded	60,000	ASME B18.3, ASTM F879	10	90600A629	0000




														5/16"-18

														1 1/2"	0.547"	0.166"	Fully Threaded	60,000	ASME B18.3, ASTM F879	10	90600A784	0000


														2"	0.547"	0.166"	Fully Threaded	60,000	ASME B18.3, ASTM F879	10	90600A822	00000




	3/8"-16

	2"														0.656"	0.199"	Fully Threaded	60,000	ASME B18.3, ASTM F879	5	90600A050	0000

Thread-Locking Stainless Steel Button Head Hex-Drive Screws

Secure parts in place on machinery that experiences mild vibration with these corrosion- and vibration-resistant button head screws. With a nylon-patch threadlocker bonded to the threads, they save you the time and mess of adding it yourself. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver.

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 can.

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

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







				2-56

				1/8"	0.164"	0.046"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A321	000000


				1/4"	0.164"	0.046"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A323	0000
				3/8"	0.164"	0.046"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A324	0000




						4-40

						1/8"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A325	0000


						3/16"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A721	00000
						1/4"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A106	00000
						3/8"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A108	00000
						1/2"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A110	00000
						3/4"	0.213"	0.059"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A722	00000




								6-32

								3/16"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A327	0000


								1/4"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A144	00000
								5/16"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A328	0000
								3/8"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A146	00000
								1/2"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A148	00000
								5/8"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A150	0000
								3/4"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A723	00000
								1"	0.262"	0.073"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A724	00000




										8-32

										1/4"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A190	00000


										3/8"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	50	93310A192	00000
										1/2"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A194	0000
										5/8"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A196	00000
										3/4"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A198	00000
										1"	0.312"	0.087"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A725	00000




												10-24

1/4"												0.361"	0.101"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A238	00000


3/8"	0.361"											0.101"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A240	00000
1/2"	0.361"											0.101"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A242	00000
5/8"	0.361"	0.101"										Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A243	00000
3/4"	0.361"	0.101"	Fully Threaded									70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A245	00000
1"	0.361"	0.101"	Fully Threaded									70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A248	0000




		10-32

		1/4"	0.361"									0.101"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A255	00000


		5/16"	0.361"	0.101"								Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A332	00000
		3/8"	0.361"	0.101"	Fully Threaded							70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A260	00000
		1/2"	0.361"	0.101"	Fully Threaded							70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A264	00000
		5/8"	0.361"	0.101"	Fully Threaded							70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A257	00000
		3/4"	0.361"	0.101"	Fully Threaded							70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A266	00000
		1"	0.361"	0.101"	Fully Threaded							70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A268	00000




				1/4"-20

				3/16"	0.437"							0.132"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A333	00000


				1/4"	0.437"	0.132"						Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A334	00000
				5/16"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A335	00000
				3/8"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A535	00000
				1/2"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	25	93310A537	00000
				5/8"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A539	00000
				3/4"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A540	0000
				7/8"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A336	00000
				1"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A542	0000
				1 1/4"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A337	0000
				1 1/2"	0.437"	0.132"	Fully Threaded					70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A338	0000




						5/16"-18

						1/2"	0.547"					0.166"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A578	00000


						5/8"	0.547"	0.166"	Fully Threaded			70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A580	00000
						3/4"	0.547"	0.166"	Fully Threaded			70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A581	00000
						1"	0.547"	0.166"	Fully Threaded			70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	10	93310A583	00000




								3/8"-16

								1/2"	0.656"			0.199"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A339	00000


								3/4"	0.656"			0.199"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A640	00000
								1 1/4"	0.656"	0.199"		Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	5	93310A646	00000




										1/2"-13

										3/4"	0.875"	0.265"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	1	93310A341	0000


1"										0.875"	0.265"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	1	93310A710	0000
1 1/2"	0.875"									0.265"	Fully Threaded	70,000	Nylon Patch	-70 to 250	ASME B18.3, ASTM F879	MIL-DTL-18240	1	93310A716	0000




										M3 × 0.5 mm

										6 mm	5.7 mm	1.65 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A801	00000


										8 mm	5.7 mm	1.65 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A802	00000
										10 mm	5.7 mm	1.65 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A803	00000
										12 mm	5.7 mm	1.65 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A804	00000




										M4 × 0.7 mm

										6 mm	7.6 mm	2.2 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A805	00000


										8 mm	7.6 mm	2.2 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A806	00000
										10 mm	7.6 mm	2.2 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A105	00000
										12 mm	7.6 mm	2.2 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A807	00000
										16 mm	7.6 mm	2.2 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A808	00000




												M5 × 0.8 mm

												8 mm	9.5 mm	2.75 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A809	00000


				12 mm	9.5 mm							2.75 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A810	00000
				16 mm	9.5 mm							2.75 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A811	00000
				20 mm	9.5 mm							2.75 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A812	00000




												M6 × 1 mm

												10 mm	10.5 mm	3.3 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A813	00000


						12 mm	10.5 mm					3.3 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A814	00000
						16 mm	10.5 mm					3.3 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A815	00000
						20 mm	10.5 mm					3.3 mm	Fully Threaded	80,000	Nylon Patch	-70 to 250	ASTM F879	MIL-DTL-18240	10	93310A816	00000