Combination Drive Machine Screws

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Tensile Strength

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Unified Standard Class 2A

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Specifications Met

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Thread Pitch

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184 Products

Rounded Head Style

Pan

The most common rounded head style

120 products

Round

The domed top gives a smooth, finished appearance

64 products

Performance

Corrosion Resistant

Stay strong when exposed to moisture, chemicals, and harsh weather

120 products

Chemical Resistant

Maintain their strength when exposed to most chemicals

27 products

Steel Round Head Combination Phillips/Slotted Screws

With two common drive styles in a single screw, you'll always have a compatible driver on hand. A Phillips driver easily aligns with the cross-shaped opening on these screws, while a slotted driver works in a pinch. However, the combination drive won't handle as much torque as a dedicated Phillips drive can. The round head has a domed profile that gives a smooth, decorative look to brackets and architectural features.

Length is measured from under the head.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

		Head
	Lg.	Dia.	Ht.	Threading	Tensile Strength, psi	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				2-56

				1/4"	0.162"	0.069"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A633	00000


				3/8"	0.162"	0.069"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A634	0000




						4-40

						1/4"	0.211"	0.086"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A621	0000


						3/8"	0.211"	0.086"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A622	0000
						1/2"	0.211"	0.086"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A623	0000




								6-32

								1/4"	0.26"	0.103"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A624	0000


								3/8"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A144	0000
								1/2"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A148	0000
								5/8"	0.26"	0.103"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A625	0000
								3/4"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A151	0000
								1"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A153	0000
								1 1/4"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A155	0000
								1 1/2"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A157	0000
								2"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A159	0000
								3"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	100	91440A161	00000
								4"	0.26"	0.103"	Fully Threaded	60,000	ASME B18.6.3	50	91440A163	0000




										8-32

										1/4"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A189	0000


										3/8"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A192	0000
										1/2"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A195	0000
										5/8"	0.309"	0.12"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A626	0000
										3/4"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A197	0000
										1"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A199	0000
										1 1/4"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A201	0000
										1 1/2"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A203	0000
										2"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A205	00000
										2 1/2"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A209	00000
										3"	0.309"	0.12"	Fully Threaded	60,000	ASME B18.6.3	100	91440A213	00000




										10-24

										3/8"	0.359"	0.137"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A627	0000


		1/2"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A242	0000
		5/8"	0.359"							0.137"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A628	0000
		3/4"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A245	0000
		1"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A247	0000
		1 1/4"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A249	0000
		1 1/2"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A251	00000
		2"	0.359"							0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A253	00000
		3"	0.359"							0.137"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A636	00000
		4"	0.359"	0.137"						Fully Threaded	60,000	ASME B18.6.3	50	91440A257	00000
		5"	0.359"	0.137"	Fully Threaded					60,000	ASME B18.6.3	25	91440A259	00000




				10-32

				3/8"	0.359"					0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A503	0000


				1/2"	0.359"					0.137"	Fully Threaded	60,000	ASME B18.6.3	100	91440A506	0000
				5/8"	0.359"	0.137"				Fully Threaded	Not Rated	ASME B18.6.3	100	91440A629	0000
				3/4"	0.359"	0.137"	Fully Threaded			60,000	ASME B18.6.3	100	91440A509	0000
				1"	0.359"	0.137"	Fully Threaded			60,000	ASME B18.6.3	100	91440A512	0000
				1 1/4"	0.359"	0.137"	Fully Threaded			60,000	ASME B18.6.3	100	91440A516	0000
				1 1/2"	0.359"	0.137"	Fully Threaded			60,000	ASME B18.6.3	100	91440A519	00000
				2"	0.359"	0.137"	Fully Threaded			60,000	ASME B18.6.3	100	91440A522	00000
				3"	0.359"	0.137"	Fully Threaded			Not Rated	ASME B18.6.3	100	91440A637	00000




						1/4"-20

						3/8"	0.472"			0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A535	0000


						1/2"	0.472"			0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A537	0000
						5/8"	0.472"			0.175"	Fully Threaded	Not Rated	ASME B18.6.3	100	91440A631	0000
						3/4"	0.472"			0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A540	0000
						1"	0.472"			0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A542	00000
						1 1/4"	0.472"	0.175"		Fully Threaded	60,000	ASME B18.6.3	100	91440A544	00000
						1 1/2"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A546	00000
						1 3/4"	0.472"	0.175"	Fully Threaded	Not Rated	ASME B18.6.3	25	91440A632	0000
						2"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	100	91440A550	00000
						2 1/2"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	50	91440A552	00000
						3"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	50	91440A554	00000


						4"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	25	91440A556	00000
						5"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	25	91440A558	00000
						6"	0.472"	0.175"	Fully Threaded	60,000	ASME B18.6.3	25	91440A560	00000




								3/8"-16

4"								0.708"	0.256"	Fully Threaded	60,000	ASME B18.6.3	5	91440A620	00000


5"	0.708"							0.256"	Fully Threaded	Not Rated	ASME B18.6.3	10	91440A638	0000
6"	0.708"							0.256"	Fully Threaded	Not Rated	ASME B18.6.3	10	91440A639	0000

Stainless Steel Pan Head Combination Phillips/Slotted Screws

Our most corrosion-resistant combination Phillips/slotted screws. A Phillips driver easily aligns with the cross-shaped opening, while a slotted driver works in a pinch. However, the combination drive won't handle as much torque as a standard Phillips drive can. The pan head has a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads.

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







				2-56

				3/16"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A302	00000


				1/4"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A303	0000
				5/16"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A304	0000
				3/8"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A305	0000
				1/2"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A306	0000
				5/8"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A307	0000
				3/4"	0.167"	0.063"	Fully Threaded	100,000	ASME B18.6.3	100	90604A308	0000




						4-40

						3/16"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A551	0000


						1/4"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A552	0000
						5/16"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A309	0000
						3/8"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A553	0000
						1/2"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A554	0000
						5/8"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A311	0000
						3/4"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A555	0000
						1"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	90604A312	0000




								6-32

								3/16"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A556	0000


								1/4"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A144	0000
								5/16"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A557	0000
								3/8"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A146	0000
								1/2"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A148	0000
								5/8"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A558	0000
								3/4"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A150	0000
								1"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A152	0000
								1 1/4"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A313	00000
								1 1/2"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	90604A314	00000




										8-32

										1/4"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A559	0000


										5/16"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A561	0000
										3/8"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A192	0000
										1/2"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A194	0000
5/8"										0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A196	00000
3/4"	0.322"									0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A197	00000
1"	0.322"									0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A199	00000
1 1/4"	0.322"									0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A315	00000
1 1/2"	0.322"									0.115"	Fully Threaded	100,000	ASME B18.6.3	100	90604A316	00000
1 3/4"	0.322"	0.115"								Fully Threaded	100,000	ASME B18.6.3	50	90604A317	0000
2"	0.322"	0.115"	Fully Threaded							100,000	ASME B18.6.3	50	90604A318	0000




		10-24

		5/16"	0.448"							0.128"	Fully Threaded	100,000	ASME B18.6.3	100	90604A811	00000


		3/8"	0.373"							0.133"	Fully Threaded	100,000	ASME B18.6.3	50	90604A240	0000
		1/2"	0.373"							0.133"	Fully Threaded	100,000	ASME B18.6.3	50	90604A242	0000
		5/8"	0.448"							0.128"	Fully Threaded	100,000	ASME B18.6.3	100	90604A244	00000
		3/4"	0.373"							0.133"	Fully Threaded	100,000	ASME B18.6.3	50	90604A245	0000
		1"	0.373"							0.133"	Fully Threaded	100,000	ASME B18.6.3	50	90604A248	00000
		1 1/4"	0.373"	0.133"						Fully Threaded	100,000	ASME B18.6.3	50	90604A319	0000
		1 1/2"	0.373"	0.133"	Fully Threaded					100,000	ASME B18.6.3	50	90604A321	0000
		1 3/4"	0.373"	0.133"	Fully Threaded					100,000	ASME B18.6.3	50	90604A322	0000
		2"	0.373"	0.133"	Fully Threaded					100,000	ASME B18.6.3	50	90604A323	00000
		2 1/2"	0.373"	0.133"	Fully Threaded					100,000	ASME B18.6.3	50	90604A324	00000


		3"	0.373"	0.133"	Fully Threaded					100,000	ASME B18.6.3	25	90604A325	00000




				10-32

				1/4"	0.373"					0.133"	Fully Threaded	100,000	ASME B18.6.3	100	90604A562	0000


				5/16"	0.373"	0.133"				Fully Threaded	100,000	ASME B18.6.3	100	90604A301	00000
				3/8"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A260	0000
				1/2"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A263	0000
				5/8"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A266	0000
				3/4"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A269	0000
				1"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A272	00000
				1 1/4"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	100	90604A563	00000
				1 1/2"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A564	00000
				1 3/4"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	50	90604A326	0000
				2 1/2"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	25	90604A327	00000


				3"	0.373"	0.133"	Fully Threaded			100,000	ASME B18.6.3	25	90604A328	00000




						12-24

						3/8"	0.511"	0.134"		Fully Threaded	100,000	ASME B18.6.3	50	90604A812	0000


						1/2"	0.511"	0.134"	Fully Threaded	100,000	ASME B18.6.3	50	90604A813	0000




								1/4"-20

								1/4"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	50	90604A565	00000


								3/8"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	50	90604A566	00000
								1/2"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	50	90604A537	00000
								5/8"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	50	90604A539	00000
3/4"								0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A541	0000
1"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A545	0000
1 1/4"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	50	90604A567	00000
1 1/2"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A549	00000
1 3/4"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A329	0000
2 1/2"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A331	00000
3"	0.492"							0.175"	Fully Threaded	100,000	ASME B18.6.3	25	90604A332	00000




								M3 × 0.5 mm

								6 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A722	0000


								8 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A723	0000
								10 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A724	0000
								12 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A725	0000
								20 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A801	0000
								25 mm	6 mm	2.52 mm	Fully Threaded	80,000	DIN 7985	100	90604A802	0000




								M4 × 0.7 mm

								8 mm	8 mm	3.25 mm	Fully Threaded	80,000	DIN 7985	100	90604A735	0000


								10 mm	8 mm	3.25 mm	Fully Threaded	80,000	DIN 7985	100	90604A736	0000
								12 mm	8 mm	3.25 mm	Fully Threaded	80,000	DIN 7985	100	90604A737	0000
								25 mm	8 mm	3.25 mm	Fully Threaded	80,000	DIN 7985	100	90604A803	00000
								30 mm	8 mm	3.25 mm	Fully Threaded	80,000	DIN 7985	50	90604A804	0000




										M5 × 0.8 mm

										10 mm	10 mm	4 mm	Fully Threaded	80,000	DIN 7985	100	90604A747	00000


										12 mm	10 mm	3.95 mm	Fully Threaded	80,000	DIN 7985	100	90604A748	00000
				20 mm						10 mm	4 mm	Fully Threaded	80,000	DIN 7985	50	90604A749	00000
				25 mm	10 mm					4 mm	Fully Threaded	80,000	DIN 7985	50	90604A805	00000
				30 mm	10 mm					4 mm	Fully Threaded	80,000	DIN 7985	50	90604A806	00000




										M6 × 1 mm

										12 mm	12 mm	4.75 mm	Fully Threaded	80,000	DIN 7985	50	90604A750	00000


						20 mm	12 mm			4.75 mm	Fully Threaded	80,000	DIN 7985	25	90604A751	0000
						25 mm	12 mm			4.75 mm	Fully Threaded	80,000	DIN 7985	25	90604A752	0000
						30 mm	12 mm			4.75 mm	Fully Threaded	80,000	DIN 7985	25	90604A807	0000


						Highly Corrosion-Resistant 316 Stainless Steel







												4-40

												1/4"	0.219"	0.08"	Fully Threaded	100,000	ASME B18.6.3	100	97181A101	0000


3/8"	0.219"											0.08"	Fully Threaded	100,000	ASME B18.6.3	100	97181A102	0000
1/2"	0.219"											0.08"	Fully Threaded	100,000	ASME B18.6.3	100	97181A103	0000




												6-32

												1/4"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	97181A104	0000


												3/8"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	97181A105	0000
												1/2"	0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	97181A106	0000
		3/4"										0.27"	0.097"	Fully Threaded	100,000	ASME B18.6.3	100	97181A107	00000




												8-32

												1/4"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	97181A108	00000


												3/8"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	97181A109	00000
												1/2"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	100	97181A111	00000
												3/4"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	50	97181A112	0000
												1"	0.322"	0.115"	Fully Threaded	100,000	ASME B18.6.3	50	97181A113	00000




												10-24

												3/8"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A114	0000


												1/2"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A115	0000
												5/8"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A116	00000
												3/4"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A117	00000
				1"								0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A118	00000




												10-32

												3/8"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A119	0000


												1/2"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A121	0000
												5/8"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A122	00000
												3/4"	0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A123	00000
						1"						0.373"	0.133"	Fully Threaded	100,000	ASME B18.6.3	50	97181A124	00000




										1/4"-20

										1/2"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	25	97181A125	0000


										3/4"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	25	97181A126	00000
										1"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	25	97181A127	00000
										1 1/4"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	25	97181A128	00000
										1 1/2"	0.492"	0.175"	Fully Threaded	100,000	ASME B18.6.3	10	97181A129	0000