Knurled-Cup Point Set Screws

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171 Products

Serrated-Locking Steel Cup-Tip Set Screws

No wiggle, no wobble. Unlike standard cup tips, the knurled edges on these screws dig deeper into shafts and other materials. With a better grip, they're less likely to loosen when securing collars, gears, and pulleys that experience vibration. Made of alloy steel, they're strong enough to hold components without wearing down.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

	Lg.	Drive Size	Hardness	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Alloy Steel







				4-40

				1/8"	0.050"	Rockwell C45	ASME B18.3	100	000000000	000000


				1/4"	0.050"	Rockwell C45	ASME B18.3	100	000000000	00000
				3/8"	0.050"	Rockwell C45	ASME B18.3	100	000000000	00000
				1/2"	0.050"	Rockwell C45	ASME B18.3	50	000000000	00000




						4-48

						1/8"	0.050"	Rockwell C45	ASME B18.3	50	000000000	00000




								5-40

								1/8"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000


								3/16"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000
								1/4"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000
								5/16"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000




										6-32

										1/8"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000


										3/16"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000
										1/4"	1/16"	Rockwell C45	ASME B18.3	100	000000000	00000




												6-40

												1/8"	1/16"	Rockwell C45	ASME B18.3	50	000000000	00000


												3/16"	1/16"	Rockwell C45	ASME B18.3	50	000000000	00000
												1/4"	1/16"	Rockwell C45	ASME B18.3	50	000000000	00000




														8-32

														1/8"	5/64"	Rockwell C45	ASME B18.3	100	000000000	00000


3/16"	5/64"													Rockwell C45	ASME B18.3	100	000000000	00000
1/4"	5/64"													Rockwell C45	ASME B18.3	100	000000000	00000
5/16"	5/64"													Rockwell C45	ASME B18.3	100	000000000	00000
3/8"	5/64"													Rockwell C45	ASME B18.3	100	000000000	00000
7/16"	5/64"	Rockwell C45												ASME B18.3	25	000000000	00000
1/2"	5/64"	Rockwell C45	ASME B18.3											50	000000000	0000
3/4"	5/64"	Rockwell C45	ASME B18.3											50	000000000	00000
1"	5/64"	Rockwell C45	ASME B18.3											50	000000000	00000




		10-24

		1/8"	3/32"											Rockwell C45	ASME B18.3	25	000000000	00000


		3/16"	3/32"	Rockwell C45										ASME B18.3	50	000000000	00000
		1/4"	3/32"	Rockwell C45	ASME B18.3									100	000000000	00000
		5/16"	3/32"	Rockwell C45	ASME B18.3									100	000000000	00000
		3/8"	3/32"	Rockwell C45	ASME B18.3									50	000000000	00000
		1/2"	3/32"	Rockwell C45	ASME B18.3									50	000000000	00000




				10-32

				1/8"	3/32"	Rockwell C45	ASME B18.3							25	000000000	0000


				3/16"	3/32"	Rockwell C45	ASME B18.3							100	000000000	00000
				1/4"	3/32"	Rockwell C45	ASME B18.3							100	000000000	00000
				3/8"	3/32"	Rockwell C45	ASME B18.3							100	000000000	00000
				7/16"	3/32"	Rockwell C45	ASME B18.3							50	000000000	00000
				1/2"	3/32"	Rockwell C45	ASME B18.3							50	000000000	00000
				5/8"	3/32"	Rockwell C45	ASME B18.3							50	000000000	0000




						1/4"-20

						3/16"	1/8"	Rockwell C45	ASME B18.3					50	000000000	00000


						1/4"	1/8"	Rockwell C45	ASME B18.3					50	000000000	00000
						5/16"	1/8"	Rockwell C45	ASME B18.3					100	000000000	00000
						3/8"	1/8"	Rockwell C45	ASME B18.3					100	000000000	00000
						7/16"	1/8"	Rockwell C45	ASME B18.3	50				000000000	00000
						1/2"	1/8"	Rockwell C45	ASME B18.3	50	000000000			00000
						5/8"	1/8"	Rockwell C45	ASME B18.3	50	000000000			00000
						3/4"	1/8"	Rockwell C45	ASME B18.3	50	000000000			00000
						7/8"	1/8"	Rockwell C45	ASME B18.3	25	000000000			0000
						1"	1/8"	Rockwell C45	ASME B18.3	25	000000000			00000
						1 1/2"	1/8"	Rockwell C45	ASME B18.3	10	000000000			00000


						2"	1/8"	Rockwell C45	ASME B18.3	10	000000000			00000




								1/4"-28

								3/16"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000


								1/4"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000
								5/16"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000
								3/8"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000
								1/2"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000
								3/4"	1/8"	Rockwell C45	ASME B18.3	50	000000000	00000




								5/16"-18

								1/4"	5/32"	Rockwell C45	ASME B18.3	100	000000000	00000


								5/16"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								3/8"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								7/16"	5/32"	Rockwell C45	ASME B18.3	25	000000000	00000
								1/2"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								5/8"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								3/4"	5/32"	Rockwell C45	ASME B18.3	25	000000000	0000
		1"						5/32"	Rockwell C45	ASME B18.3	25	000000000	0000
		1 1/2"	5/32"					Rockwell C45	ASME B18.3	10	000000000	0000
		2"	5/32"					Rockwell C45	ASME B18.3	5	000000000	0000




								5/16"-24

								1/4"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000


								5/16"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								3/8"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000
								1/2"	5/32"	Rockwell C45	ASME B18.3	50	000000000	00000




								3/8"-16

								1/4"	3/16"	Rockwell C45	ASME B18.3	25	000000000	00000


								5/16"	3/16"	Rockwell C45	ASME B18.3	25	000000000	0000
								3/8"	3/16"	Rockwell C45	ASME B18.3	50	000000000	00000
								7/16"	3/16"	Rockwell C45	ASME B18.3	25	000000000	00000
								1/2"	3/16"	Rockwell C45	ASME B18.3	50	000000000	00000
								5/8"	3/16"	Rockwell C45	ASME B18.3	25	000000000	0000
								3/4"	3/16"	Rockwell C45	ASME B18.3	25	000000000	0000
								1"	3/16"	Rockwell C45	ASME B18.3	25	000000000	00000
								1 1/4"	3/16"	Rockwell C45	ASME B18.3	25	000000000	00000
								1 1/2"	3/16"	Rockwell C45	ASME B18.3	10	000000000	00000
								2"	3/16"	Rockwell C45	ASME B18.3	5	000000000	00000




							3/8"-24

							5/16"		3/16"	Rockwell C45	ASME B18.3	25	000000000	0000


							3/8"		3/16"	Rockwell C45	ASME B18.3	50	000000000	00000
							1/2"		3/16"	Rockwell C45	ASME B18.3	50	000000000	00000




										1/2"-13

3/8"										1/4"	Rockwell C45	ASME B18.3	10	000000000	00000


1/2"	1/4"									Rockwell C45	ASME B18.3	10	000000000	00000
5/8"	1/4"									Rockwell C45	ASME B18.3	10	000000000	0000
3/4"	1/4"									Rockwell C45	ASME B18.3	10	000000000	0000
1"	1/4"									Rockwell C45	ASME B18.3	10	000000000	00000
1 3/4"	1/4"									Rockwell C45	ASME B18.3	5	000000000	00000
2"	1/4"									Rockwell C45	ASME B18.3	5	000000000	00000




										1/2"-20

										3/4"	1/4"	Rockwell C45	ASME B18.3	5	000000000	00000


		7/8"								1/4"	Rockwell C45	ASME B18.3	5	000000000	00000
		1"	1/4"							Rockwell C45	ASME B18.3	5	000000000	00000
		1 1/4"	1/4"							Rockwell C45	ASME B18.3	5	000000000	00000
		1 1/2"	1/4"							Rockwell C45	ASME B18.3	5	000000000	00000




										5/8"-11

										1/2"	5/16"	Rockwell C45	ASME B18.3	1	000000000	0000


				5/8"	5/16"					Rockwell C45	ASME B18.3	5	000000000	00000
				3/4"	5/16"					Rockwell C45	ASME B18.3	1	000000000	0000
				1"	5/16"					Rockwell C45	ASME B18.3	1	000000000	0000




										3/4"-10

										3/4"	3/8"	Rockwell C45	ASME B18.3	5	000000000	00000


										Alloy Steel







								M3 × 0.5 mm

								3 mm					1.5 mm	Rockwell C45	ISO 4029	50	000000000	0000


								4 mm					1.5 mm	Rockwell C45	ISO 4029	50	000000000	00000
								5 mm					1.5 mm	Rockwell C45	ISO 4029	50	000000000	00000
								6 mm					1.5 mm	Rockwell C45	ISO 4029	50	000000000	00000
								8 mm					1.5 mm	Rockwell C45	ISO 4029	25	000000000	0000




									M4 × 0.7 mm

									4 mm				2 mm	Rockwell C45	ISO 4029	50	000000000	00000


									5 mm				2 mm	Rockwell C45	ISO 4029	50	000000000	00000
									6 mm				2 mm	Rockwell C45	ISO 4029	50	000000000	00000
									8 mm				2 mm	Rockwell C45	ISO 4029	50	000000000	00000
									10 mm				2 mm	Rockwell C45	ISO 4029	25	000000000	0000




									M5 × 0.8 mm

									5 mm				2.5 mm	Rockwell C45	ISO 4029	50	000000000	00000


									6 mm				2.5 mm	Rockwell C45	ISO 4029	50	000000000	00000
									8 mm				2.5 mm	Rockwell C45	ISO 4029	50	000000000	00000
									10 mm				2.5 mm	Rockwell C45	ISO 4029	50	000000000	00000




			M6 × 1 mm

			6 mm										3 mm	Rockwell C45	ISO 4029	50	000000000	00000


			8 mm										3 mm	Rockwell C45	ISO 4029	50	000000000	00000
			10 mm										3 mm	Rockwell C45	ISO 4029	50	000000000	00000
			20 mm										3 mm	Rockwell C45	ISO 4029	25	000000000	00000




				M8 × 1.25 mm

				8 mm	4 mm									Rockwell C45	ISO 4029	50	000000000	00000


				10 mm	4 mm									Rockwell C45	ISO 4029	50	000000000	00000
				12 mm	4 mm									Rockwell C45	ISO 4029	50	000000000	00000
				20 mm	4 mm									Rockwell C45	ISO 4029	10	000000000	0000
				25 mm	4 mm									Rockwell C45	ISO 4029	10	000000000	0000
				30 mm	4 mm									Rockwell C45	ISO 4029	10	000000000	0000

Serrated-Locking Stainless Steel Cup-Tip Set Screws

These corrosion-resistant screws have knurled edges that dig deeper into material when standard cup tips might slip. With a better grip, they're less likely to loosen when securing collars, gears, and pulleys that experience vibration. Made of stainless steel, they won't rust, but they're not as strong as alloy steel.

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.

	Lg.	Drive Size	Hardness	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				4-40

				1/8"	0.050"	Rockwell B80	ASME B18.3	50	000000000	000000


				3/16"	0.050"	Rockwell B80	ASME B18.3	50	000000000	00000
				1/4"	0.050"	Rockwell B80	ASME B18.3	50	000000000	00000




						6-32

						1/8"	1/16"	Rockwell B80	ASME B18.3	50	000000000	00000


						3/16"	1/16"	Rockwell B80	ASME B18.3	50	000000000	00000
						1/4"	1/16"	Rockwell B80	ASME B18.3	50	000000000	0000
						3/8"	1/16"	Rockwell B80	ASME B18.3	50	000000000	0000




								8-32

								1/8"	5/64"	Rockwell B80	ASME B18.3	50	000000000	00000


								3/16"	5/64"	Rockwell B80	ASME B18.3	50	000000000	00000
								1/4"	5/64"	Rockwell B80	ASME B18.3	50	000000000	0000
								3/8"	5/64"	Rockwell B80	ASME B18.3	50	000000000	00000
								1/2"	5/64"	Rockwell B80	ASME B18.3	25	000000000	0000




										10-24

										3/16"	3/32"	Rockwell B80	ASME B18.3	25	000000000	00000


										1/4"	3/32"	Rockwell B80	ASME B18.3	50	000000000	0000
										3/8"	3/32"	Rockwell B80	ASME B18.3	50	000000000	00000




												10-32

												1/4"	3/32"	Rockwell B80	ASME B18.3	50	000000000	0000


												3/8"	3/32"	Rockwell B80	ASME B18.3	25	000000000	0000
												1/2"	3/32"	Rockwell B80	ASME B18.3	25	000000000	00000




	1/4"-20

	1/4"												1/8"	Rockwell B80	ASME B18.3	50	000000000	0000


	3/8"	1/8"											Rockwell B80	ASME B18.3	25	000000000	0000
	1/2"	1/8"	Rockwell B80										ASME B18.3	25	000000000	00000
	3/4"	1/8"	Rockwell B80										ASME B18.3	10	000000000	0000
	1"	1/8"	Rockwell B80										ASME B18.3	10	000000000	0000




			5/16"-18

			1/4"										5/32"	Rockwell B80	ASME B18.3	10	000000000	00000


			5/16"	5/32"	Rockwell B80								ASME B18.3	10	000000000	0000
			3/8"	5/32"	Rockwell B80								ASME B18.3	10	000000000	0000
			1/2"	5/32"	Rockwell B80								ASME B18.3	10	000000000	00000




					3/8"-16

					3/8"								3/16"	Rockwell B80	ASME B18.3	10	000000000	0000


					1/2"	3/16"							Rockwell B80	ASME B18.3	10	000000000	00000
					5/8"	3/16"	Rockwell B80						ASME B18.3	10	000000000	00000
					3/4"	3/16"	Rockwell B80						ASME B18.3	10	000000000	00000




							M3 × 0.5 mm

							3 mm						1.5 mm	Rockwell B80	—	25	000000000	0000


							4 mm						1.5 mm	Rockwell B80	—	25	000000000	0000
							5 mm						1.5 mm	Rockwell B80	—	25	000000000	0000




									M4 × 0.7 mm

									4 mm				2 mm	Rockwell B80	—	25	000000000	0000


									5 mm				2 mm	Rockwell B80	—	25	000000000	0000
									6 mm				2 mm	Rockwell B80	—	25	000000000	0000




											M5 × 0.8 mm

											5 mm		2.5 mm	Rockwell B80	—	25	000000000	0000


6 mm											2.5 mm		Rockwell B80	—	25	000000000	0000
10 mm											2.5 mm		Rockwell B80	—	25	000000000	0000




												M6 × 1 mm

												6 mm	3 mm	Rockwell B80	—	25	000000000	0000


	10 mm											3 mm	Rockwell B80	—	25	000000000	0000
	12 mm	3 mm										Rockwell B80	—	25	000000000	0000




												M8 × 1.25 mm

												8 mm	4 mm	Rockwell B80	—	10	000000000	0000


												10 mm	4 mm	Rockwell B80	—	10	000000000	0000
			12 mm									4 mm	Rockwell B80	—	10	000000000	0000

Steel Cup-Tip Set Screw Assortments




Serrated Locking

Keep a range of sizes on hand to fasten a variety of machinery and equipment. These screws are made of alloy steel, so they're strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.

Serrated Locking—Unlike standard cup tips, the knurled edges on these screws dig deeper into shafts and other material. With a better grip, they're less likely to loosen when securing collars, gears, and pulleys that experience vibration.

Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.

		Each
Black-Oxide Alloy Steel







	Serrated Locking

	300	1/2"-13 × 1/2" Lg. (25 Pieces), 1/4"-20 × 1/2" Lg. (25 Pieces), 1/4"-20 × 1/4" Lg. (25 Pieces), 1/4"-20 × 3/8" Lg. (25 Pieces), 1/4"-28 × 1/4" Lg. (25 Pieces), 3/8"-16 × 1/2" Lg. (25 Pieces), 3/8"-16 × 3/8" Lg. (25 Pieces), 5/16"-18 × 1/2" Lg. (25 Pieces), 5/16"-18 × 3/8" Lg. (25 Pieces), 8-32 × 1/4" Lg. (25 Pieces), 10-32 × 1/4" Lg. (25 Pieces), 10-32 × 3/16" Lg. (25 Pieces)	Plastic Box	000000000	0000000