Hex Stoppers | McMaster-Carr

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63 Products

Threaded Locating and Support Buttons


	Flat Head

Domed Head

Use these buttons to support and position workpieces and fixtures from the bottom or side. Threading makes these buttons easier to replace than press-fit, so they are a good choice for high-wear applications. They’re also known as rest buttons.

Hardened Heat Treatment—Hardened steel buttons are stronger and resist wear better than steel buttons. They are precision ground, which helps them maintain their shape and size, even with repeated use. This makes them a good choice for use in modular fixtures where repeatability and exact positioning are important.

Domed Head—Buttons with a domed head support rounded or irregularly shaped workpieces with minimal contact.

Hex—Their hex shape lets you screw them into a threaded hole with a wrench or socket.

			Thread
	Lg.	Wd.	Size	Lg.	Lg. Tolerance	Shape	Specs. Met		Each
Steel with Flat Head



		3/16"	1/4"	8-32	3/16"	0" to 0.015"	Hex	—	0000000	00000


		3/16"	5/16"	10-32	1/4"	0" to 0.015"	Hex	—	0000000	0000
		3/16"	3/8"	1/4"-28	5/16"	0" to 0.015"	Hex	—	0000000	0000
		1/4"	3/8"	1/4"-20	3/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/4"	3/8"	1/4"-28	5/16"	0" to 0.015"	Hex	—	0000000	0000
		1/4"	1/2"	3/8"-16	1/2"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/4"	1/2"	3/8"-24	7/16"	0" to 0.015"	Hex	—	0000000	0000
		1/4"	5/8"	1/2"-13	5/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/4"	3/4"	5/8"-11	3/4"	0" to 0.012"	Hex	—	00000000	0000
		3/8"	3/8"	1/4"-20	3/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/8"	3/8"	1/4"-28	5/16"	0" to 0.015"	Hex	—	0000000	0000


		3/8"	1/2"	3/8"-16	1/2"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/8"	1/2"	3/8"-24	7/16"	0" to 0.015"	Hex	—	0000000	0000
		3/8"	5/8"	1/2"-13	5/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/8"	3/4"	5/8"-11	3/4"	0" to 0.012"	Hex	—	00000000	0000
		1/2"	3/8"	1/4"-20	3/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/2"	1/2"	3/8"-16	1/2"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/2"	1/2"	3/8"-24	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		1/2"	5/8"	1/2"-13	5/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1/2"	5/8"	1/2"-20	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		1/2"	3/4"	1/2"-20	9/16"	0" to 0.015"	Hex	—	0000000	0000


		1/2"	3/4"	5/8"-11	3/4"	0" to 0.012"	Hex	—	00000000	0000
		3/4"	3/8"	1/4"-20	3/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/4"	3/8"	1/4"-28	3/8"	0.005" to 0.015"	Hex	—	000000	0000
		3/4"	1/2"	3/8"-16	1/2"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/4"	1/2"	3/8"-24	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		3/4"	5/8"	1/2"-13	5/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		3/4"	5/8"	1/2"-20	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		3/4"	3/4"	5/8"-11	3/4"	0" to 0.012"	Hex	—	00000000	0000
		1"	3/8"	1/4"-20	3/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1"	3/8"	1/4"-28	3/8"	0.005" to 0.015"	Hex	—	000000	0000


		1"	1/2"	3/8"-16	1/2"	-0.003" to 0.012"	Hex	—	00000000	0000
		1"	1/2"	3/8"-24	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		1"	5/8"	1/2"-13	5/8"	-0.003" to 0.012"	Hex	—	00000000	0000
		1"	5/8"	1/2"-20	1/2"	0.005" to 0.015"	Hex	—	000000	0000
		1"	3/4"	5/8"-11	3/4"	0" to 0.012"	Hex	—	00000000	0000
		10 mm	10 mm	M6 × 1 mm	11 mm	-0.2 mm to 0.2 mm	Hex	DIN 6320	0000000	0000
		15 mm	13 mm	M8 × 1.25 mm	13 mm	-0.2 mm to 0.2 mm	Hex	DIN 6320	0000000	0000
		20 mm	17 mm	M10 × 1.5 mm	16 mm	-0.2 mm to 0.2 mm	Hex	DIN 6320	0000000	0000
		25 mm	19 mm	M12 × 1.75 mm	20 mm	-0.2 mm to 0.2 mm	Hex	DIN 6320	0000000	0000


		Hardened Steel with Flat Head



				10 mm	17 mm	M8 × 1.25 mm	10 mm	-0.01 mm to 0.01 mm	Hex	—	0000000	00000


				10 mm	19 mm	M10 × 1.5 mm	12 mm	-0.01 mm to 0.01 mm	Hex	—	0000000	00000
				10 mm	22 mm	M12 × 1.75 mm	14 mm	-0.01 mm to 0.01 mm	Hex	—	0000000	00000


Hardened Steel with Domed Head



				10 mm	17 mm	M8 × 1.25 mm	10 mm	-0.1 mm to 0.1 mm	Hex	—	0000000	00000


				10 mm	19 mm	M10 × 1.5 mm	12 mm	-0.1 mm to 0.1 mm	Hex	—	0000000	00000
				10 mm	22 mm	M12 × 1.75 mm	14 mm	-0.1 mm to 0.1 mm	Hex	—	0000000	00000

Swiveling Locating and Support Buttons

The swiveling tip supports uneven and angled surfaces on workpieces and fixtures. These buttons screw into a threaded hole. Also known as rest buttons.

		Head				Thread
	Tip Dia.	Lg.	Wd.	Tip-to-Head Lg.	Lg.	Size	Lg.	Range of Motion	Head Lg. Tolerance	Load Cap., lb.	Tip Material		Each
Steel



		1/4"	1/4"	3/8"	1/16"	5/16"	10-32	1/2"	28°	-0.002" to 0.002"	1,150	Stainless Steel	0000000	000000


		5/16"	5/16"	7/16"	1/8"	7/16"	1/4"-20	1/2"	28°	-0.002" to 0.002"	2,400	Stainless Steel	0000000	00000
		7/16"	3/8"	1/2"	1/8"	1/2"	5/16"-18	1/2"	28°	-0.002" to 0.002"	2,750	Stainless Steel	0000000	00000
		9/16"	1/2"	5/8"	1/8"	5/8"	3/8"-16	1/2"	28°	-0.002" to 0.002"	3,400	Stainless Steel	0000000	00000
		3/4"	5/8"	13/16"	1/8"	3/4"	1/2"-13	1"	32°	-0.002" to 0.002"	5,900	Stainless Steel	0000000	00000
		13/16"	11/16"	15/16"	1/8"	13/16"	5/8"-11	1"	32°	-0.002" to 0.002"	9,900	Stainless Steel	0000000	00000
		8 mm	8 mm	10 mm	2 mm	10 mm	M6 × 1 mm	12 mm	28°	-0.05 mm to 0.05 mm	2,050	Stainless Steel	0000000	00000
		11 mm	11 mm	13 mm	3 mm	14 mm	M8 × 1.25 mm	12 mm	28°	-0.05 mm to 0.05 mm	3,450	Stainless Steel	0000000	00000

Screw-Mount Locating and Support Buttons

Flat Head

Image of Product. Front orientation. Locating and Support Buttons. Screw-Mount Locating and Support Buttons, Hex.

Hex

Domed Head

Also known as rest buttons, these buttons support workpieces and fixtures from the bottom or side. Mount them onto a screw or stud extending from your jig or table.

Hex—Hex buttons are easy to turn with a wrench. They have a threaded hole, so you can mount them to a threaded bolt or stud.

Domed Head—Those with a domed head support round or irregularly shaped workpieces with minimal contact.

	Lg., mm	Lg. Tolerance, mm	Thread Size	Mounting Fasteners Included		Each
Hardened Steel—Hex with Flat Head



	17	15	-0.01 to 0.01	M8 × 1.25 mm	No	0000000	000000


	19	20	-0.01 to 0.01	M10 × 1.5 mm	No	0000000	00000
	22	20	-0.01 to 0.01	M12 × 1.75 mm	No	0000000	00000


	Hardened Steel—Hex with Domed Head



			17	15	-0.1 to 0.1	M8 × 1.25 mm	No	0000000	00000


			19	20	-0.1 to 0.1	M10 × 1.5 mm	No	0000000	00000
			22	20	-0.1 to 0.1	M12 × 1.75 mm	No	0000000	00000

Snap-In Plugs for Socket Head Screws

Insert into screw heads for a finished look that keeps debris from clogging or damaging the drive. These plugs have flexible prongs that snap into the socket for a snug fit.

Chrome-Plated Steel—Shiny and strong, the finish adds a layer of polish and corrosion resistance.

		Head
	For Drive Size	Dia.	Thk.		Each
Chrome-Plated Steel



		3/16"	11/32"	5/64"	000000000	00000


		1/4"	13/32"	1/16"	000000000	0000
		5/16"	7/16"	1/16"	000000000	0000