Snap Discs | McMaster-Carr

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65 Products

Snap-Acting Thermostats

Also known as snap discs, these thermostats switch on cooling systems or switch off heating systems when equipment gets too hot. Each thermostat has five temperature options for switch activation; choose the one that best suits your application.

Unlike heat-actuated switches, these thermostats reset automatically, saving you the effort of replacing a melted fusible link. To calculate their reset temperature, subtract their differential temperature from the temperature you set them at. For example, a thermostat set at 100° F with a 20° F differential will reset at 80° F.

Close Switch at Temperature Setting—Normally closed thermostats are also known as high-limit thermostats—they turn off at a set temperature. They’re often used with electric water heaters, stoves, and furnaces.

Open Switch at Temperature Setting—Normally open thermostats are also known as low-limit thermostats—they turn on at a set temperature. They’re good for use with fans and blowers.

										Overall
	Temp. Setting, ° F	Max. Temp. Differential, ° F	Switch Designation	Switch Starting Position	Voltage, V AC	Current, amp	Wire Connection	Terminal Size	Face Dia.	Ht.	Wd.	Dp.	Hole Diameter (No. of)	Mounting Fasteners Included		Each
Close Switch at Temperature Setting



		90, 100, 110, 120, 130	20	SPST	1 Off	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N11	000000


		140, 150, 160, 170, 180	20	SPST	1 Off	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N12	00000


		Open Switch at Temperature Setting



				135, 145, 155, 165, 175	20	SPST	1 On	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N16	00000


				135, 145, 155, 165, 175	40	SPST	1 On	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N13	00000
				175, 185, 195, 205, 215	40	SPST	1 On	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N14	00000
				210, 220, 230, 240, 250	40	SPST	1 On	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N15	00000
				250, 260, 270, 280, 290	40	SPST	1 On	120, 240	25	Quick-Disconnect Terminal	1/4"	3/4"	1 3/4"	2"	1 3/8"	3/16" (2)	No	8624N17	00000

Female Fabric Snap Halves

These female snap halves create the finished button-look of a snap. Pair them with standard male snap halves or male/male dual-sided snap halves (sold separately) to create a complete snap.

Fabric Snaps

18-8 Stainless Steel—18-8 stainless steel snap halves have good corrosion resistance and may be mildly magnetic.

Black-Oxide Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Nickel-Plated Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic. The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

		Pkg. of 10		Pkg. of 100
	Snap Dia.		Pkg.		Pkg.
18-8 Stainless Steel



		9/16"	95690A151	00000	95690A501	000000


		Black-Oxide Brass



				9/16"	95690A451	0000	95690A502	00000


				Nickel-Plated Brass



						9/16"	95690A251	0000	95690A503	00000

Snap Halves

	Pkg. Qty.		Pkg.
18-8 Stainless Steel Male Snap Halves	10	95690A101	00000
18-8 Stainless Steel Male Snap Halves	100	95690A601	00000
Black-Oxide Brass Male Snap Halves	10	95690A401	0000
Black-Oxide Brass Male Snap Halves	100	95690A602	00000
Nickel-Plated Brass Male Snap Halves	10	95690A201	0000
Nickel-Plated Brass Male Snap Halves	100	95690A603	00000
Nickel-Plated Brass Male/Male Dual-Sided Snap Halves	10	95690A275	0000

Miniature Fabric Snaps

Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Black-Oxide Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Nickel-Plated Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic. The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

	Pkg. Qty.		Pkg.
Brass



	1/2"	10	95690A491	00000


	Black-Oxide Brass



			1/2"	10	95690A471	0000


			Nickel-Plated Brass



					1/2"	10	95690A441	0000

Snap Halves

	Pkg. Qty.		Pkg.
Brass Male Snap Halves	10	95690A461	00000
Black-Oxide Brass Male Snap Halves	10	95690A431	0000
Nickel-Plated Brass Male Snap Halves	10	95690A411	0000

Low-Profile Snap-Together Fasteners

When two parallel pieces are pressed together, these fasteners are about one-third to one-half the thickness of other snap-together fasteners.

Discs

Polypropylene

Polypropylene—Polypropylene fasteners have hook heads that click together to create a light hold.

Rubber Adhesive Backing—Rubber adhesive bonds quickly to most materials, including hard-to-bond plastics.

						Pkg. of 10		Pkg. of 50
	Dia.	Hook Thk.	Temp. Range, ° F	Heads per Sq. In.	Color		Pkg.		Pkg.
Polypropylene







				Rubber Adhesive Backing

				3/4"	0.04"	-40 to 120	400	Clear	1710N2	000000	1710N1	000000

Male Fabric Snap Halves

Pair these male snap halves with standard female snap halves or female/male dual-sided snap halves (sold separately) to make a complete snap.

Fabric Snaps

18-8 Stainless Steel—18-8 stainless steel snap halves have good corrosion resistance and may be mildly magnetic.

Black-Oxide Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Nickel-Plated Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic. The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

		Pkg. of 10		Pkg. of 100
	Snap Dia.		Pkg.		Pkg.
18-8 Stainless Steel



		9/16"	95690A101	00000	95690A601	000000


		Black-Oxide Brass



				9/16"	95690A401	0000	95690A602	00000


				Nickel-Plated Brass



						9/16"	95690A201	0000	95690A603	00000

Snap Halves

	Pkg. Qty.		Pkg.
18-8 Stainless Steel Female Fabric Snap Halves	10	95690A151	00000
18-8 Stainless Steel Female Fabric Snap Halves	100	95690A501	00000
Black-Oxide Brass Female Fabric Snap Halves	10	95690A451	0000
Black-Oxide Brass Female Fabric Snap Halves	100	95690A502	00000
Nickel-Plated Brass Female Fabric Snap Halves	10	95690A251	0000
Nickel-Plated Brass Female Fabric Snap Halves	100	95690A503	00000
Nickel-Plated Brass Female/Male Dual-Sided Fabric Snap Halves	10	95690A299	0000

Miniature Fabric Snaps

Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Black-Oxide Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic.

Nickel-Plated Brass—Brass snap halves are rust resistant, electrically conductive, and nonmagnetic. The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

	Pkg. Qty.		Pkg.
Brass



	1/2"	10	95690A461	00000


	Black-Oxide Brass



			1/2"	10	95690A431	0000


			Nickel-Plated Brass



					1/2"	10	95690A411	0000

Snap Halves

	Pkg. Qty.		Pkg.
Brass Female Snap Halves	10	95690A491	00000
Black-Oxide Brass Female Snap Halves	10	95690A471	0000
Nickel-Plated Brass Female Snap Halves	10	95690A441	0000

Snap-Together Fasteners

The heads on these fasteners interlock when two pieces are pressed together.

Discs

Polyolefin

Polyolefin—Polyolefin fasteners have mushroom-shaped heads that interlock for a secure hold.

Acrylic Plastic Adhesive Backing—Acrylic plastic adhesive bonds well to most materials, including vinyl and glass. It is more chemical-resistant than rubber and can be used outdoors.

Plain Backing—Plain-back fasteners have counterbored holes for fastening with screws.

	Temp. Range, ° F	Heads per Sq. In.	Color	Pkg. Qty.		Pkg.
Polyolefin







	Acrylic Plastic Adhesive Backing

	3/4"	—	0.14"	-20 to 200	250	Clear	10	87535K31	000000




			Plain Backing

			1 1/8"	0.16"	0.24"	-20 to 200	250	Black	10	87535K41	00000

Fabric Snaps with Tapping Screw Stud

Everything you need to fasten a fabric snap to a solid surface. Use these snaps in drilled holes.

	Thread Lg.	Snap Dia.	Screw Material	For Use In	Pkg. Qty.		Pkg.
Nickel-Plated Brass



	No. 7	3/8"	9/16"	18-8 Stainless Steel	Composite, Particleboard, Plywood, Wood	6	95730A440	00000

Female/Male Dual-Sided Fabric Snap Halves

Once installed, these fasteners provide a female snap half on one side of your fabric and a male snap half on the other. They let you fasten multiple layers of fabric together. Made of nickel-plated brass, they resist corrosion and tarnishing in outdoor covers, marine canvas, and other moisture-prone applications.

	Pkg. Qty.		Pkg.
Nickel-Plated Brass



	9/16"	10	95690A299	00000

Male/Male Dual-Sided Fabric Snap Halves

Once installed, these fasteners provide a male snap half on both sides of your fabric. Create a complete snap by joining each male side with a female snap half for a finished look on assembled layers of fabric.

	Pkg. Qty.		Pkg.
Nickel-Plated Brass



	9/16"	10	95690A275	00000

Adhesive-Back Fabric Snaps

Peel off the backing and stick these male snap halves to flat or curved surfaces. Pair them with standard female snap halves (sold separately) to make a complete snap.

				Black Plastic		White Plastic
Snap Dia.	Base Dia.	Temp. Range, ° F	Pkg. Qty.		Pkg.		Pkg.
9/16"	3/4"	-30 to 230	8	95690A905	000000	95690A902	000000

Snap Halves

Blind-Rivet Fabric Snaps

Fasten these male snap halves to a solid surface when you only have access to one side. Pair them with a standard female snap half or a female/male dual-sided snap (sold separately) to create a complete snap. A blind rivet tool (sold separately) is required for installation.

Nickel-Plated Brass—Brass snaps are rust resistant, electrically conductive, and nonmagnetic.

	Lg.	Snap Dia.	For Hole Size	Dia.	Mandrel Material	Pkg. Qty.		Pkg.
Nickel-Plated Brass



	0.125" to 0.188"	0.299"	9/16"	0.125"	0.125"	18-8 Stainless Steel	25	95707A688	000000


	0.188" to 0.375"	0.486"	9/16"	0.125"	0.125"	18-8 Stainless Steel	25	95707A687	00000

Accessories for Fabric Snaps


Manual Tool for Blind Rivets	6659A21	Each	000000
18-8 Stainless Steel Female Fabric Snap Halves	95690A151	Pkg. of 10	0000
Black-Oxide Brass Female Fabric Snap Halves	95690A451	Pkg. of 10	0000
Nickel-Plated Brass Female Fabric Snap Halves	95690A251	Pkg. of 10	0000
Nickel-Plated Brass Female/Male Dual-Sided Fabric Snap Halves	95690A299	Pkg. of 10	0000

Fabric Snap Kits

The included hand punch creates a clean hole and sets the snap, eliminating the need for a workbench or separate hole-punching tool. Nickel-plated brass resists corrosion, making these snaps suitable for covers and other weather-exposed fabrics.

	Snaps				Replacement Snaps
	Snap Dia.	Includes		Each	Pkg. Qty.		Pkg.
Nickel-Plated Brass



		9/16"	Die Hand Punch Tool Six Female Fabric Snap Halves Six Male Fabric Snap Halves	95730A210	00000	6	95730A320	00000

Fabric Snaps with Tapping Screw Stud Kits

Use these snaps when you need a fabric snap fastened to a solid surface. The tapping screw stud cuts its own threads in a pilot hole.

	Snaps								Replacement Snaps
	Screw Size	Thread Lg.	Snap Dia.	Screw Material	For Use In	Includes		Each	Pkg. Qty.		Pkg.
Nickel-Plated Brass



		No. 7	3/8"	9/16"	18-8 Stainless Steel	Composite, Particleboard, Plywood, Wood	Die Hand Punch Tool Six Female Fabric Snap Halves Six Male Fabric Snap Halves with Tapping Screw Studs	95730A230	000000	6	95730A440	00000

Fabric Snaps with Drilling Screw Stud

When you need to fasten a fabric snap to a solid surface, drive these snap halves into place and pair with a standard female snap half or a female/male dual-sided snap (sold separately) to create a complete snap. The drilling screw stud drills its own hole and the snap has a Phillips drive for easy installation.

	Thread Lg.	Snap Dia.	Screw Material	For Use In	Drive Size	Pkg. Qty.		Pkg.
Nickel-Plated Brass



	No. 8	1/2"	9/16"	18-8 Stainless Steel	Aluminum, Fiberglass, Steel	No. 2	10	95707A782	00000


	No. 8	1/2"	9/16"	410 Stainless Steel	Fiberglass, Steel	No. 2	10	95707A780	00000
	No. 8	3/4"	9/16"	18-8 Stainless Steel	Aluminum, Fiberglass, Steel	No. 2	10	95707A786	00000

Snap Halves

	Pkg. Qty.		Pkg.
18-8 Stainless Steel Female Fabric Snap Halves	10	95690A151	00000
Black-Oxide Brass Female Fabric Snap Halves	10	95690A451	0000
Nickel-Plated Brass Female Fabric Snap Halves	10	95690A251	0000
Nickel-Plated Brass Female/Male Dual-Sided Fabric Snap Halves	10	95690A299	0000

Fabric Snaps with Threaded Stud


Style A	Style B

Use these snaps in threaded holes when you need to fasten a fabric snap to a solid surface. Pair them with a standard female snap half or a female/male dual-sided snap (sold separately) to create a complete snap. The threaded stud installs in threaded holes. Snaps have a Phillips drive for easy installation.

18-8 Stainless Steel—18-8 stainless steel snaps have good corrosion resistance and are mildly magnetic.

Nickel-Plated Brass—Brass snaps are rust resistant, electrically conductive, and nonmagnetic.

	Thread Size	Thread Lg.	Snap Dia.	Screw Material	For Use In	Drive Size	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	A	8-32	3/16"	1/2"	18-8 Stainless Steel	Aluminum, Brass, Copper, Fiberglass, Steel, Titanium	No. 2	10	95707A130	00000


	A	8-32	1/2"	1/2"	18-8 Stainless Steel	Aluminum, Brass, Copper, Fiberglass, Steel, Titanium	No. 2	10	95707A870	00000


	Nickel-Plated Brass



			A	8-32	3/8"	1/2"	Brass	Aluminum, Brass, Copper, Fiberglass, Steel, Titanium	No. 2	10	95707A110	0000


			A	8-32	5/8"	1/2"	Brass	Aluminum, Brass, Copper, Fiberglass, Steel, Titanium	No. 2	10	95707A120	0000
			B	10-32	3/8"	9/16"	Brass	Aluminum, Brass, Copper, Fiberglass, Steel, Titanium	No. 2	10	95707A685	0000

Snap Halves

	Pkg. Qty.		Pkg.
18-8 Stainless Steel Female Fabric Snap Halves	10	95690A151	00000
Black-Oxide Brass Female Fabric Snap Halves	10	95690A451	0000
Nickel-Plated Brass Female Fabric Snap Halves	10	95690A251	0000
Nickel-Plated Brass Female/Male Dual-Sided Fabric Snap Halves	10	95690A299	0000

Male Fabric Snap Halves with Tapping Screw Stud

Use these snaps in drilled holes when you need to fasten a fabric snap to a solid surface. Pair them with a standard female snap half or a female/male dual-sided snap (sold separately) to create a complete snap. The tapping screw stud cuts its own threads in a pilot hole and the snap has a Phillips drive for easy installation.

18-8 Stainless Steel—18-8 stainless steel snaps have good corrosion resistance and are mildly magnetic.

Nickel-Plated Brass—Brass snaps are rust resistant, electrically conductive, and nonmagnetic.

	Thread Lg.	Snap Dia.	Screw Material	For Use In	Drive Size	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	No. 8	3/8"	9/16"	18-8 Stainless Steel	Aluminum, Brass, Composite, Copper, Fiberglass, Particleboard, Plywood, Steel, Titanium, Wood	No. 2	10	95707A720	00000


	No. 8	5/8"	9/16"	18-8 Stainless Steel	Aluminum, Brass, Composite, Copper, Fiberglass, Particleboard, Plywood, Steel, Titanium, Wood	No. 2	10	95707A740	0000


	Nickel-Plated Brass



			No. 8	3/8"	9/16"	18-8 Stainless Steel	Aluminum, Brass, Composite, Copper, Fiberglass, Particleboard, Plywood, Steel, Titanium, Wood	No. 2	10	95707A781	0000


			No. 8	5/8"	9/16"	18-8 Stainless Steel	Aluminum, Brass, Composite, Copper, Fiberglass, Particleboard, Plywood, Steel, Titanium, Wood	No. 2	10	95707A783	0000
			No. 10	5/8"	9/16"	18-8 Stainless Steel	Aluminum, Brass, Composite, Copper, Fiberglass, Particleboard, Plywood, Steel, Titanium, Wood	No. 2	10	95707A684	0000

Snap Halves

	Pkg. Qty.		Pkg.
18-8 Stainless Steel Female Fabric Snap Halves	10	95690A151	00000
Black-Oxide Brass Female Fabric Snap Halves	10	95690A451	0000
Nickel-Plated Brass Female Fabric Snap Halves	10	95690A251	0000
Nickel-Plated Brass Female/Male Dual-Sided Fabric Snap Halves	10	95690A299	0000

Fabric Snaps

18-8 Stainless Steel—18-8 stainless steel snaps have good corrosion resistance and may be mildly magnetic.

Black-Oxide Brass—Brass snaps are rust resistant, electrically conductive, and nonmagnetic.

Nickel-Plated Brass—Brass snaps are rust resistant, electrically conductive, and nonmagnetic. The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

Nickel-Plated Steel—The nickel-plated finish is more corrosion-resistant than the black-oxide finish.

		Pkg. of 6		Pkg. of 10		Pkg. of 100
	Snap Dia.		Pkg.		Pkg.		Pkg.
18-8 Stainless Steel



		9/16"	———	0	95691A715	000000	95691A700	000000


		Black-Oxide Brass



				1/2"	———	0	95691A106	0000	95691A105	00000


				9/16"	———	0	95691A775	0000	95691A270	00000


				Nickel-Plated Brass



						1/2"	———	0	95691A104	0000	95691A103	00000


						9/16"	95730A320	00000	95691A745	0000	95691A660	00000


						Nickel-Plated Steel



								9/16"	———	0	95691A102	0000	95691A101	00000