Light Bulb Bases | McMaster-Carr

	For Bulb Base Type For Bulb Base Type


Flanged	Screw In

Bayonet	Bi-Pin

Wire Terminal	Single Pin

Four Pin	Twist and Lock

Two-Pin Wedge	Recessed Double Contact

Four-Pin Wedge

	Light Technology Light Technology

	Mount Type Mount Type

	For Bulb Shape Number For Bulb Shape Number

	Material Material

	Height Height

	Wire Connection Type Wire Connection Type

Screw Terminals

Spring-Clamp Terminals

Wire Leads

Push On

	For Maximum Bulb Diameter For Maximum Bulb Diameter

	Electrical Connection Type Electrical Connection Type


Hardwire	Plug

	Voltage Voltage

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

RoHS Compliant

	For Bulb Base Size For Bulb Base Size


Midget	Miniature

	Mounting Location Mounting Location

Ceiling

Wall

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

DFARS Specialty Metals
COTS-Exempt

	For Socket Base Size For Socket Base Size

Medium (Standard
Household)

Candelabra

	For Bulb Shape For Bulb Shape


Tubular	Twin Tube

Quad Tube	Triple U- Shaped

	Lens Color Lens Color

	Green		Red
	Yellow		Clear
	White

	For Cutout Diameter For Cutout Diameter

	For Wire Construction For Wire Construction

Solid

Stranded

	For Bulb Base Diameter For Bulb Base Diameter

0.28"

0.36"

1 1/16"

	Specifications Met Specifications Met

CSA

	For Socket Base Diameter For Socket Base Diameter

1/2"

1 1/16"

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

REACH Compliant

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51 Products

Holders and Lens Caps for Miniature Light Bulbs

Install miniature light bulbs into control panels, machines, and other devices using bulb holders.

For styles A-C, pair a bulb holder with a lens cap to create a miniature lamp. The lens cap diffuses light and protects the bulb.

Style D uses a retaining ring to hold the bulb in place.

For Midget Flanged Base (.28" Dia.)

Bulb Holders

	For Bulb Shape No.	For Max. Bulb Dia.	For Cutout Dia.	For Max. Panel Thick.	Ht.	Material		Each
A	T1 3/4	1/4"	1/2"	0.25"	0.84"	Metal	0000000	000000

Lens Caps

	For Bulb Shape No.	For Max. Bulb Dia.	Lens Dia.	Ht.	Material	Choose a Color		Each
A	T1 3/4	1/4"	0.5"	0.7"	Plastic	Clear, Green, Red	0000000	000000

For Miniature Bayonet Base (.36" Dia.)

Bulb Holders

	For Bulb Shape No.	For Max. Bulb Dia.	For Cutout Dia.	For Max. Panel Thick.	Ht.	Material		Each
B	T3 1/4	0.35"	11/16"	0.25"	1.88"	Metal	0000000	000000
C	T4 1/2	0.58"	7/8"	0.313"	1.67"	Plastic	0000000	0000

Lens Caps

	For Bulb Shape No.	For Max. Bulb Dia.	Lens Dia.	Ht.	Material	Choose a Color		Each
B	T3 1/4	0.35"	0.63"	0.63"	Plastic	Green, Red, Yellow	0000000	000000
C	T4 1/2	0.58"	1.14"	0.52"	Plastic	Clear, Green, Red	0000000	0000

For Wire-Terminal Base

			Bulb Holders						Retaining Rings
	For Bulb Shape No.	For Max. Bulb Dia.	For Cutout Dia.	For Max. Panel Thick.	Ht.	Material		Each	Ht.	Material		Each
D	T1 3/4	0.2"	1/4"	0.125"	0.24"	Plastic	0000000	00000	0.16"	Plastic	0000000	00000

Sealed Holders and Lens Caps for Miniature Light Bulbs

A sealing gasket keeps out oil and other contaminants. Pair a bulb holder with a lens cap to create a miniature lamp in control panels, machines, and other devices.

For Miniature Bayonet Base (0.36" Dia.)

Bulb Holders

For Bulb Shape No.	For Max. Bulb Dia.	For Cutout Dia.	For Max. Panel Thick.	Ht.	Material	Features		Each
T3 1/4	0.35"	11/16"	0.25"	1.55"	Metal	Sealing Gasket	0000000	000000

Lens Caps

For Bulb Shape No.	For Max. Bulb Dia.	Lens Dia.	Ht.	Material	Choose a Color		Each
T3 1/4	0.35"	0.83"	0.86"	Plastic	Clear, Green, Red, White, Yellow	0000000	000000

Lamp Sockets for Screw-In Light Bulbs

Without Switch

With Pull Chain

With Knob

Hardwire these sockets to a power source.

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

	For Screw-In Base		Pipe
Switch Type	Size	Dia.	Thread Type	Size	Gender	Color	Wire Connection Type	No. of Wire Leads	Specifications Met		Each
For LED, CFL, Halogen, and Incandescent Bulbs
Plastic
Without Switch	Medium (Standard Household)	1 1/16"	NPSM	1/8	Female	Black	Wire Leads	2	UL Listed	00000000	00000
Brass
Without Switch	Medium (Standard Household)	1 1/16"	NPSM	1/8	Female	__	Screw Terminals	__	UL Listed	00000000	0000
Pull Chain	Medium (Standard Household)	1 1/16"	NPSM	1/8	Female	__	Screw Terminals	__	UL Listed	00000000	0000
Knob	Medium (Standard Household)	1 1/16"	NPSM	1/8	Female	__	Screw Terminals	__	UL Listed	00000000	0000

Plug-In Lamp Sockets for Screw-In Light Bulbs

Turn an overhead outlet or an extension cord into a temporary light. These sockets have a two-prong plug for a quick connection.

For Screw-In Base
Size	Dia.	Switch Type	Material	Color	Specifications Met		Each
For LED, CFL, Halogen, and Incandescent Bulbs
Medium (Standard Household)	1 1/16"	Without Switch	Plastic	Brown	UL Listed	00000000	00000

Sockets for Tubular Light Bulbs

Replace worn sockets in light fixtures. These sockets work with tubular fluorescent bulbs, and some also work with LED bulbs.

Sockets for rapid and preheat ballasts are also known as non-shunted.

Sockets for instant-start ballasts are also known as shunted.

For T5 Bulbs—Fluorescent and LED

For Bi-Pin T5 Bulbs

	For Max.								For Wire
For Ballast Start Type	Bulb Wattage	Voltage	Mount Type	Ht.	Wd.	Dp.	Material	Color	Gauge	Construction	Specifications Met		Pair
For Bi-Pin Base
Rapid	120W	600V AC	Slide On	1 1/8"	3/4"	1/2"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	00000

For T8 and T12 Bulbs—Fluorescent

For Bi-Pin T8 and T12 Bulbs

For Single-Pin T8 and T12 Bulbs

	For Max.								For Wire
For Ballast Start Type	Bulb Wattage	Voltage	Mount Type	Ht.	Wd.	Dp.	Material	Color	Gauge	Construction	Specifications Met		Pair
For Bi-Pin Base
Instant	660W	600V AC	Slide On	1 3/4"	1 1/4"	3/4"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	000000
For Single Pin Base
Instant	660W	600V AC	Slide On	1 7/8"	1 3/8"	1 7/8"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	0000

For T8 and T12 Bulbs—Fluorescent and LED

For Bi-Pin T8 and T12 Bulbs

For Recessed Double-Contact T8 and T12 Bulbs

	For Max.								For Wire
For Ballast Start Type	Bulb Wattage	Voltage	Mount Type	Ht.	Wd.	Dp.	Material	Color	Gauge	Construction	Specifications Met		Pair
For Bi-Pin Base
Rapid, Preheat	660W	600V AC	Slide On	1 3/4"	1 1/4"	3/4"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	00000
Rapid, Preheat	660W	600V AC	Slide On	2 1/8"	1 1/4"	3/4"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	0000
For Recessed Double-Contact Base
Rapid, Preheat	660W	600V AC	Slide On	2 3/8"	1 1/2"	2"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	00000

Tight-Hold Sockets for Tubular Light Bulbs

Lock bulbs in place to prevent vibration from shaking them loose. They replace worn sockets in light fixtures. These sockets work with tubular fluorescent or LED bulbs.

Sockets for rapid and preheat ballasts are also known as non-shunted.

Sockets for instant-start ballasts are also known as shunted.

	For Max.								For Wire
For Ballast Start Type	Bulb Wattage	Voltage	Mount Type	Ht.	Wd.	Dp.	Material	Color	Gauge	Construction	Specifications Met		Pair
For T8 Bulbs—Fluorescent
For Bi-Pin Base
Rapid, Programmed	600W	600V AC	Slide On	1 3/8"	1 1/8"	3/4"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	00000
For T8 Bulbs—Fluorescent and LED
For Bi-Pin Base
Instant	660W	600V AC	Slide On	1 3/8"	1 1/8"	3/4"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	00000
For T8 and T12 Bulbs—Fluorescent and LED
For Bi-Pin Base
Rapid, Preheat	660W	600V AC	Slide On	1 3/8"	1"	3/8"	Plastic	White	18	Solid, Stranded	CSA Certified, UL Listed	0000000	0000

Sockets for Plug-In Compact Light Bulbs

Replace worn sockets in light fixtures. These sockets work with plug-in compact fluorescent and LED bulbs.

Push snap-on sockets onto fixture panels that are 0.023” to 0.039” thick.

Fastener-mount sockets provide more holding power than snap-on sockets so they withstand vibration better.

		For Max.								For Wire		Mount. Holes
	For Bulb Base No.	Bulb Wattage	Voltage	Mount Type	Ht.	Wd.	Dp.	Material	Color	Gauge	Construction	No. of	Dia.	Specifications Met		Each
For Twin Tube Bulbs—CFL and LED
For Four Pin Base
A	2G11	75W	600V AC	Fastener Mount	1"	1 7/8"	1 1/2"	Plastic	White	18	Solid	2	3/8"	CSA Certified, UL Listed	0000000	00000
For Two-Pin Wedge Base
B	G23	75W	600V AC	Snap On	1 3/8"	1 1/2"	1 3/8"	Plastic	White	18	Solid, Stranded	__	__	CSA Certified, UL Listed	0000000	0000
B	GX23	75W	600V AC	Snap On	1 3/8"	1 1/2"	1 3/8"	Plastic	White	18	Solid, Stranded	__	__	CSA Certified, UL Listed	0000000	0000
C	G23/G23-2	75W	600V AC	Fastener Mount	1 1/4"	1 3/8"	1 1/4"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	0000
C	GX23/GX23-2	75W	600V AC	Fastener Mount	1 1/4"	1 3/8"	1 1/4"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	0000
D	G23/G23-2	75W	600V AC	Snap On	1 1/8"	1 1/2"	1 3/8"	Plastic	White	18	Solid, Stranded	__	__	CSA Certified, UL Listed	0000000	0000
D	GX23/GX23-2	75W	600V AC	Snap On	1 1/8"	1 1/2"	1 3/8"	Plastic	White	18	Solid, Stranded	__	__	CSA Certified, UL Listed	0000000	0000
For Quad Tube Bulbs—CFL and LED
For Two-Pin Wedge Base
E	G24d-2	75W	600V AC	Fastener Mount	1 3/8"	1 1/2"	1 1/2"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	00000
E	G24d-3	75W	600V AC	Fastener Mount	1 3/8"	1 1/2"	1 1/2"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	00000
For Quad Tube and Triple U-Shaped Bulbs—CFL and LED
For Four-Pin Wedge Base
F	G24q-3/GX24q-3	75W	600V AC	Fastener Mount	1 3/8"	1 1/2"	1 1/2"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	00000
F	GX24q-2	75W	600V AC	Fastener Mount	1 3/8"	1 1/2"	1 1/2"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	00000
For Triple U-Shaped Bulbs—CFL and LED
For Four-Pin Wedge Base
F	GX24q-4	75W	600V AC	Fastener Mount	1 3/8"	1 1/2"	1 1/2"	Plastic	White	18	Solid, Stranded	4	5/32"	CSA Certified, UL Listed	0000000	00000

Light Socket Extenders

Use these extenders when bulbs are too short to fit into deep or recessed fixtures.

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

For Bulb Base			For Socket Base
Type	Size	Dia.	Type	Size	Dia.	Extension Lg.	Material	Specifications Met		Each
For Incandescent, Halogen, CFL, and LED Bulbs
Screw In	Medium (Standard Household)	1 1/16"	Screw In	Medium (Standard Household)	1 1/16"	1 1/4"	Porcelain	UL Listed	00000000	00000

Medium Screw-In Socket Adapters for Candelabra Screw-In Sockets

Convert a fixture that uses candelabra-base bulbs to accept medium-base bulbs with these adapters.

For Bulb Base			For Socket Base
Type	Size	Dia.	Type	Size	Dia.		Each
For Incandescent, Halogen, CFL, and LED Bulbs
Screw In	Medium (Standard Household)	1 1/16"	Screw In	Candelabra	1/2"	0000000	00000

Twist-and-Lock Socket Adapters for Medium Screw-In Sockets

Convert a fixture that uses medium-base bulbs to accept GU24 bi-pin base bulbs with these adapters.

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

For Bulb Base		For Socket Base
Type	No.	Type	Size	Dia.		Each
For Incandescent, Halogen, CFL, and LED Bulbs
Twist and Lock	GU24	Screw In	Medium (Standard Household)	1 1/16"	000000	00000

Nut and Washer Assortments for Lamp Pipe

Fasten lamp pipe to a socket or base to build and repair lamps.

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

Thread Type	Pipe Size	Material	Includes		Each
NPSM	1/8	Brass-Plated Steel	Two Flat Washers, Two Lock Washers, Two Nuts	00000000	00000

Lamp Pipe

Fully Threaded

Threaded on Both Ends

Connect lamp components and conceal wires when building or repairing lamps.

Fully threaded pipe is often used when the pipe is concealed.

Pipe that is threaded on both ends is smooth in the middle, providing a polished look when pipe is exposed.

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

Fully Threaded
Lg.	Pipe Size	Thread Type	Gender	Material	Color		Each
30"	1/8	NPSM	Male	Yellow Zinc-Plated Steel	__	00000000	00000
Threaded on Both Ends
30"	3/8	NPSM	Male	Powder-Coated Steel	White	00000000	00000
48"	3/8	NPSM	Male	Powder-Coated Steel	White	00000000	00000

Light Socket Locking Clips

For Bi-Pin Base Bulbs

For Single-Pin and
Recessed
Double-Contact Base Bulbs

Stop vibration from shaking tubular fluorescent and LED bulbs loose.

For Bulb
Base Type	Shape	Shape No.	Material	Specifications Met		Each
For Fluorescent and LED Bulbs
Bi-Pin	Tubular	T8, T12	Plastic	CSA Certified, UL Listed	0000000	00000
Single Pin, Recessed Double Contact	Tubular	T12	Plastic	CSA Certified, UL Listed	0000000	0000

Light Bulb Sockets

Install sockets for medium (standard household) screw-in base light bulbs.

Styles A-C mount to outlet boxes.

		Overall									Mounting Holes
Style	Switch Type	Dia.	Lg.	Wd.	Voltage	Max. Wattage per Bulb	Collar Dia.	Housing Material	For Outlet Box Ht.	Mounting Hardware Included	No. of	Dia.	Specifications Met		Each
For LED, CFL, Halogen, and Incandescent Bulbs
A	No Switch	4 1/2"	__	__	120V AC, 208V AC, 240V AC	660W	1 9/16"	Porcelain	3 1/4", 4"	Yes	2	7/32"	UL Listed, CSA Certified	00000000	00000
B	Pull Chain	4 1/2"	__	__	120V AC, 208V AC, 240V AC	250W	1 11/16"	Porcelain	3 1/4", 4"	Yes	2	7/32"	UL Listed, CSA Certified	0000000	00000
C	Pull Chain	4 1/2"	__	__	120V AC	250W	1 5/8"	Porcelain	3 1/4", 4"	Yes	2	7/32"	UL Listed, CSA Certified	0000000	00000
D	No Switch	__	2"	2"	120V AC, 208V AC, 240V AC, 277V AC, 480V AC	660W	1 1/2"	Porcelain	__	No	2	3/16"	UL Listed	00000000	00000

Temporary Light Bulb Sockets

Also known as pigtail holders. Temporarily wire these sockets to provide light during construction. They have a rubber lip that molds around bulbs to form a water-resistant seal.

					Housing
Overall Dia.	Voltage	Screw-In Base Size	Max. Wattage per Bulb	Collar Dia.	Material	Color	Wire Connection Type	Specifications Met		Each
For LED, CFL, Halogen, and Incandescent Bulbs
1 1/2"	120V AC, 208V AC, 240V AC, 277V AC, 480V AC	Medium (Standard Household)	300W	1 5/8"	Ceramic	Yellow	Wire Leads	UL Listed	0000000	000000

Pull Cords for Light Bulb Sockets

To lengthen a pull-chain light switch, these cords have a bead chain connector that snaps onto beaded chain. They have a braided construction and a bell-shaped end fitting so they won't unravel or fray.

Overall Lg.		Each
36"	00000000	00000