Button Caps | McMaster-Carr

	Mounting Thread Size Mounting Thread Size

1/4"-40

3/8"-27

3/8"-32

	Color Color

	Black		Gray
	Red		Clear
	White		Yellow

	Material Material

Rubber

Stainless Steel

	Environment Environment

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

RoHS Compliant

	Environmental Rating Environmental Rating

	Specifications Met Specifications Met

CID

CE Marked

ASTM

	Mounting Thread Type Mounting Thread Type

UNEF

UNS

Metric

	For Maximum Toggle Diameter For Maximum Toggle Diameter

	For Maximum Toggle Depth For Maximum Toggle Depth

	For Maximum Push-Button Diameter For Maximum Push- Button Diameter

	For Maximum Push-Button Projection For Maximum Push- Button Projection

	Input Voltage Input Voltage

	Men's Shoe Size Men's Shoe Size

One Size
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
12 1/2
13
13 1/2
14
14 1/2
15
15 1/2
16
16 1/2
17
18
19

	Women's Shoe Size Women's Shoe Size

One Size
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
12 1/2
13
13 1/2
14
14 1/2
15
15 1/2
16
16 1/2
17
17 1/2
18
18 1/2
19
20
21

	Switching Voltage Switching Voltage

	Garment Garment

Toe Guards

Foot Guards

	Mounting Location Mounting Location

DIN Rail

Outlet Box

	For Maximum Switch Width For Maximum Switch Width

	Guard Material Guard Material

Steel

Aluminum

Plastic

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	For Maximum Rocker Cutout Height For Maximum Rocker Cutout Height

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65 Products

Choosing an Electrical Switch

Protect switches from moisture and dust by replacing panel mounting nuts with these rubber covers.

For technical drawings and 3-D models, click on a part number.

Mounting Thread		For Max. Push-Button
Size	Type	Dia.	Projection	Material	Includes	Environment	Environmental Rating	Specifications Met	Choose a Color		Each
1/4"-40	UNS	0.19"	0.2"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	00000
1/4"-40	UNS	0.19"	0.26"	Rubber	Mounting Nut	__	__	__	Black, Gray, Red, White	0000000	0000
3/8"-27	UNS	0.3"	0.4"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Clear	00000000	0000
3/8"-32	UNEF	0.3"	0.42"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Clear	00000000	0000
15/32"-32	UNS	0.42"	0.28"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000
15/32"-32	UNS	0.42"	0.44"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Clear, Gray	00000000	0000
1/2"-32	UNS	0.42"	0.28"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000
5/8"-24	UNEF	0.52"	0.28"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000

Heavy Duty Covers for Push-Button Switches

Made of stainless steel, these covers offer more protection than rubber covers. Use them in place of panel mounting nuts to protect push-button switches from impact, moisture, and dust.

For technical drawings and 3-D models, click on a part number.

Mounting Thread		For Max. Push-Button
Size	Type	Dia.	Projection	Material	Includes	Specifications Met		Each
15/32"-32	UNS	0.42"	0.3"	Stainless Steel	Mounting Nut	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	00000000	000000

Quick-Install Covers for Toggle Switches

Install these covers without removing switches from the panel—covers fit over mounting hardware. They protect toggle switches from moisture and dust.

For technical drawings and 3-D models, click on a part number.

	For Max. Toggle
Mounting Thread Size	Dp.	Dia.	Includes	Specifications Met	Choose a Color		Each
15/32"-32	0.73"	0.25"	Mounting Nut	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red	00000000	00000

Covers for Toggle Switches

Protect toggle switches from moisture and dust by replacing panel mounting nuts with these rubber covers.

For technical drawings and 3-D models, click on a part number.

		For Max. Toggle
Mounting Thread Size	Mounting Thread Pitch	Dp.	Dia.	Includes	Environment	Environmental Rating	Specifications Met	Choose a Color		Each
1/4"-40	__	0.37"	0.06"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red, White	0000000	00000
1/4"-40	__	0.5"	0.06"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red, White	0000000	0000
15/32"-32	__	0.71"	0.22"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red, White	0000000	0000
15/32"-32	__	0.9"	0.22"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000
15/32"-32	__	0.92"	0.3"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000
1/2"-32	__	0.66"	0.22"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray	00000000	0000
M12	1 mm	0.67"	0.23"	Mounting Nut	Corrosive, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black	00000000	0000

Heavy Duty Covers for Toggle Switches

With a nickel-plated brass cap, these covers are more impact resistant than rubber covers. Use them in place of panel mounting nuts to protect toggle switches from moisture and dust.

For technical drawings and 3-D models, click on a part number.

	For Max. Toggle
Mounting Thread Size	Dp.	Dia.	Includes	Environmental Rating	Specifications Met		Each
15/32"-32	0.66"	0.22"	Mounting Nut	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	0000000	00000

Seals for Toggle Switches

Create a seal around the base of a toggle to protect against moisture and dust while leaving the actuator exposed. To install, replace the panel mounting nuts with these seals.

For technical drawings and 3-D models, click on a part number.

Mounting Thread Size	For Max. Toggle Dia.	Material	Includes	Environment	Environmental Rating	Specifications Met	Choose a Color		Each
1/4"-40	0.19"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red, White	0000000	00000
15/32"-32	0.21"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Gray	00000000	00000
15/32"-32	0.24"	Rubber	Mounting Nut	Corrosive, Oily, Outdoor, Submersible, Washdown	IP66, IP68, NEMA 6P, NEMA 13	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Black, Gray, Red, White	0000000	0000

Panel Seals for Toggle Switches

Seal the panel cutout around a toggle switch. Use these seals in place of panel mounting nuts to protect toggle switches against moisture and dust.

For technical drawings and 3-D models, click on a part number.

Mounting Thread Size	For Max. Toggle Dia.	Material	Includes	Specifications Met	Color		Each
15/32"-32	0.47"	Rubber	Mounting Nut	A-A-59588 Class 3A Grade 50, C-UL Recognized Component, UL Recognized Component	Gray	00000000	00000

Guards for Toggle Switches

Keep two-position toggle switches safely locked in the off position. These spring-loaded guards will stay up when opened, but return the toggle to the off position when closed.

For technical drawings and 3-D models, click on a part number.

For Mounting Thread Size	For Max. Toggle Dp.	For Panel Cutout Dia.	Features		Each
15/32"-32, M12	0.69"	1/2"	Spring-Loaded Cover	000000	000000

Two-Hand Safety Switches

It takes two hands to activate these switches, minimizing the risk of accidental equipment start up. A complete system requires two switches, one safety relay, and two outlet boxes.

Switches meet OSHA requirements and ANSI standards for machine operator safety. They're rated IP64 for protection from splashing water.

Safety relays control the two switches by sending an output signal when both switches are activated within 0.5 seconds of each other. Self-monitoring circuitry offers additional protection—if any part of the system fails, the entire system shuts down until repaired.

Outlet boxes have a drilled hole to fit the switch.

Switch guards protect switches against damage and accidental activation. Use one guard per switch.

For technical drawings and 3-D models, click on a part number.

Switches

Switch

						Actuator
Input Voltage	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Material	Color	Switching Current @ Voltage	Dia.		Each
24V DC	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	Plastic	Gray	1 A @ 250 V AC/90 V DC	2 3/8"	00000000	0000000
120V AC	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	Plastic	Gray	1 A @ 250 V AC/90 V DC	2 3/8"	00000000	000000

Safety Relays

Safety Relay

Input Voltage	No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Switching Current @ Voltage	For DIN Rail Ht., mm	Wire Connection Type		Each
24V AC/DC	2	2 Off (Normally Open)	4	DPST-NO	4 A @ 230 V AC, 2 A @ 24 V DC	35	Screw Terminals	00000000	0000000
115V AC	2	2 Off (Normally Open)	4	DPST-NO	4 A @ 230 V AC, 2 A @ 24 V DC	35	Screw Terminals	00000000	000000

Outlet Boxes

Outlet Box

Conduit
No. of Connections	Trade Size	Ht.	Wd.	Dp.	Mounting Fasteners Included	Environmental Rating		Each
1	3/4	2 1/8"	2 7/8"	6"	Yes	IP64	00000000	0000000
2	3/4	2 1/8"	2 7/8"	6"	Yes	IP64	00000000	000000

Switch Guards

Switch Guard

Ht.	Wd.	Dp.		Each
2"	4 7/8"	5 3/8"	00000000	0000000

Covers for Rocker Switches

With extended flaps to shield the entire switch, these covers protect rocker switches from moisture and dust.

For Max. Switch		For Max. Rocker Cutout
Ht.	Wd.	Ht.	Wd.	Environment	Environmental Rating	Material		Each
0.83"	0.59"	0.75"	0.5"	Wet Location	IP54	Rubber	0000000	00000
0.86"	0.39"	0.75"	0.28"	Wet Location	IP54	Rubber	0000000	0000
0.96"	0.96"	0.88"	0.75"	Wet Location	IP54	Rubber	0000000	0000
0.96"	1.04"	0.75"	0.75"	Wet Location	IP54	Rubber	0000000	0000
1.09"	0.73"	0.95"	0.61"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.13"	0.88"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.17"	0.81"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.18"	0.87"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.19"	0.81"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.19"	0.88"	Wet Location	IP54	Rubber	0000000	0000
1.22"	1"	1.2"	0.87"	Wet Location	IP54	Rubber	0000000	0000
1.27"	0.68"	1.12"	0.48"	Wet Location	IP54	Rubber	0000000	0000
1.27"	0.68"	1.13"	0.48"	Wet Location	IP54	Rubber	0000000	0000
1.27"	0.68"	1.15"	0.48"	Wet Location	IP54	Rubber	0000000	0000
1.72"	0.97"	1.25"	0.75"	Wet Location	IP54	Rubber	0000000	0000
1.72"	0.97"	1.34"	0.69"	Wet Location	IP54	Rubber	0000000	0000
1.72"	0.97"	1.5"	0.88"	Wet Location	IP54	Rubber	0000000	0000
2.19"	0.98"	1.44"	0.94"	Wet Location	IP54	Rubber	0000000	0000

Toe and Foot Guards

With Elastic Heel Strap

With Adjustable Heel Strap and Snap Hook

With Foot Strap and Snaps

With Shoe Lace Strap

With Adjustable Heel Strap and Buckle

Wear these guards over shoes or boots to shield toes and feet from accidental impact.

Plastic guards are lightweight for protection against minor bumps and impacts up to 30 ft.-lbs. Steel and aluminum guards meet ASTM F2413 for protection against accidental impact and compression up to 75 ft.-lbs.

Order your normal shoe size. For large work shoes, order one size up. Guards with a foot strap and snaps are designed to fit over large work shoes or boots, so order your normal shoe size.

Footwear Size Conversion
For Men's Shoe Size	For Women's Shoe Size
One Size	One Size

Plastic Guard with Elastic Heel Strap

Toe and Foot Guards						Replacement Straps
Guard Lg.	Guard Wd.	Color	For Men's Shoe Size		Pair		Pair
3 1/4"	4 1/4"	Yellow	One Size	0000000	000000	0000000	00000
5 1/2"	4 1/2"	Yellow	One Size	0000000	00000	0000000	0000

Steel Guard with Adjustable Heel Strap and Snap Hook

Toe and Foot Guards						Replacement Straps
Guard Lg.	Guard Wd.	Specifications Met	For Men's Shoe Size		Pair		Pair
3 5/8"	4 1/2"	ASTM F2413	One Size	0000000	000000	0000000	00000

Steel Guard with Foot Strap and Snaps

Guard Lg.	Guard Wd.	Overshoe Material	Specifications Met	Color	For Men's Shoe Size		Pair
4"	4 1/2"	Rubber	ASTM F2413	Black	5 - 7	00000000	000000
4"	4 1/2"	Rubber	ASTM F2413	Black	7 1/2 - 10	00000000	00000
4"	4 1/2"	Rubber	ASTM F2413	Black	10 1/2 - 11 1/2	00000000	00000
4"	4 1/2"	Rubber	ASTM F2413	Black	12 - 13 1/2	00000000	00000
4"	4 1/2"	Rubber	ASTM F2413	Black	14 - 16 1/2	00000000	00000
4"	4 1/2"	Rubber	ASTM F2413	Black	17 - 19	00000000	00000

Aluminum Guard with Shoe Lace Strap

Toe and Foot Guards						Replacement Straps
Guard Lg.	Guard Wd.	Specifications Met	For Men's Shoe Size		Pair		Pair
5 1/4"	5 3/4"	ASTM F2413	One Size	0000000	000000	0000000	00000

Aluminum Guard with Adjustable Heel Strap and Buckle

Toe and Foot Guards						Replacement Straps
Guard Lg.	Guard Wd.	Specifications Met	For Men's Shoe Size		Pair		Pair
7 1/2"	5 1/2"	ASTM F2413	One Size	0000000	000000	0000000	00000
7 1/2"	6 1/2"	ASTM F2413	One Size	0000000	00000	0000000	0000