Electrical Bolts | McMaster-Carr

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53 Products

Grounding Lugs for Enclosures

Create a common grounding path for not only internal components and circuits, but also your enclosure’s body. These lugs are used in hazardous locations to prevent static buildup on metal surfaces. They’re also common in telecommunications applications where static could damage components. To conduct electricity, they’re made of brass. They maintain a watertight seal with the enclosure thanks to their O-ring, which sits securely in a groove on the lug.

For Outer Panel Hole Dia.	Lg.	Thread Size	Material	Includes		Each
0.425"	2 1/2"	3/8"-16	Brass	Mounting Hardware, O-Ring	7309N11	000000

Split-Bolt Splices

Slide large wires in and tighten the hex nut for a strong, secure hold between the wire and screw. Loosen the hex to make a quick adjustment or to reuse the splice elsewhere. These splices are easy to use, but the connection isn't fully protected by the body of the splice.

	For Wire			For Tap Wire
	Ga.	Construction	Material	Min. Ga.	Construction	Wire Slot Wd.	Head Wd.	Terminal Material	Max. Temp., ° F	Max. Voltage, V AC	Certification		Each
Noninsulated



		16 to 8	Stranded	Copper	16	Stranded	0.15"	0.38"	Copper	190	600	CSA Certified, UL Listed	6921K56	00000


		10 to 6	Solid, Stranded	Aluminum, Copper	10	Solid	0.21"	0.56"	Aluminum	190	600	CSA Certified, UL Listed	6921K81	00000
		10 to 6	Solid	Copper	16	Solid	0.17"	0.5"	Copper	190	600	CSA Certified, UL Listed	6921K57	0000
		8 to 4	Solid, Stranded	Aluminum, Copper	10	Solid	0.26"	0.62"	Aluminum	190	600	CSA Certified, UL Listed	6921K82	00000
		8 to 4	Solid, Stranded	Copper	16	Solid	0.22"	0.56"	Copper	190	600	CSA Certified, UL Listed	6921K58	0000
		6 to 2	Solid, Stranded	Copper	14	Stranded	0.33"	0.69"	Copper	190	600	CSA Certified, UL Listed	6921K61	0000
		6 to 2	Solid, Stranded	Copper	12	Solid	0.33"	0.69"	Copper	190	600	CSA Certified, UL Listed	6921K591	0000
		6 to 2	Stranded	Aluminum, Copper	8	Stranded	0.33"	0.69"	Aluminum	190	600	CSA Certified, UL Listed	6921K83	00000
		4 to 1/0	Solid, Stranded	Copper	14	Solid	0.38"	0.75"	Copper	190	600	CSA Certified, UL Listed	6921K62	0000
		2 to 2/0	Solid, Stranded	Copper	14	Stranded	0.42"	0.81"	Copper	190	600	CSA Certified, UL Listed	6921K63	00000
		2 to 2/0	Stranded	Aluminum, Copper	8	Stranded	0.44"	0.88"	Aluminum	190	600	CSA Certified, UL Listed	6921K85	00000


		2 to 3/0	Solid, Stranded	Copper	12	Solid	0.47"	0.88"	Copper	190	600	CSA Certified, UL Listed	6921K64	00000
		2 to 4/0	Stranded	Aluminum, Copper	6	Stranded	0.55"	1.13"	Aluminum	190	600	CSA Certified, UL Listed	6921K86	00000
		1/0 to 250 MCM	Solid, Stranded	Copper	10	Solid	0.58"	1"	Copper	190	600	CSA Certified, UL Listed	6921K65	00000
		4/0 to 350 MCM	Stranded	Copper	8	Solid	0.75"	1.5"	Copper	190	600	CSA Certified, UL Listed	6921K66	00000
		250 to 500 MCM	Stranded	Copper	8	Solid	0.83"	1.63"	Copper	190	600	CSA Certified, UL Listed	6921K67	00000
		350 to 750 MCM	Stranded	Copper	8	Solid	1.03"	1.94"	Copper	190	600	CSA Certified, UL Listed	6921K68	00000

Grounding Screws

Connect grounding wires to steel structures, fence posts, and transformers. These screws can also tap one or two cables from a bus bar.

For Wire Ga.	Screw Size	Material	Certification		Each
12, 11, 10, 9, 8	1/4"	Bronze	CSA Certified, UL Listed	7923K11	000000
10, 9, 8, 7, 6	1/4"	Bronze	CSA Certified, UL Listed	7923K13	00000
10, 9, 8, 7, 6, 5, 4	5/16"	Bronze	CSA Certified, UL Listed	7923K15	00000
10, 9, 8, 7, 6, 5, 4, 3, 2	3/8"	Bronze	CSA Certified, UL Listed	7923K17	00000
10, 9, 8, 7, 6, 5, 4, 3, 2, 1	3/8"	Bronze	CSA Certified, UL Listed	7923K19	00000
2, 1, 1/0, 2/0	1/2"	Bronze	CSA Certified, UL Listed	7923K21	00000
2, 1, 1/0, 2/0, 3/0	1/2"	Bronze	CSA Certified, UL Listed	7923K23	000000
1, 1/0, 2/0, 3/0, 4/0	5/8"	Bronze	CSA Certified, UL Listed	7923K25	000000

Electrical Grounding Screws

Green so you know they’re for grounding, these screws secure electrical connections. The wide flange creates a solid, flat contact surface for reliable conductivity. As you drive these screws, they cut their own threads in drilled holes.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

		Head
	Lg.	Wd.	Ht.	Flange Dia.	Tapping Screw Type	Approx. Threads per In.	Drill Bit Size	Shank Cross Section	Pkg. Qty.		Pkg.
Green Dyed Zinc-Plated Steel







				No. 6 Screw Size

				1/4"	0.25"	0.118"	0.328"	F	32	31 Ga.	Round	25	92597A600	00000


				3/8"	0.25"	0.118"	0.328"	F	32	31 Ga.	Round	25	92597A100	0000




						No. 8 Screw Size

						1/4"	0.25"	0.141"	0.348"	F	32	26 Ga.	Round	25	92597A700	0000


						5/16"	0.25"	0.141"	0.348"	F	32	26 Ga.	Round	25	92597A800	0000
						3/8"	0.25"	0.141"	0.348"	F	32	26 Ga.	Round	25	92597A201	0000
						1/2"	0.25"	0.141"	0.348"	F	32	26 Ga.	Round	25	92597A300	0000




								No. 10 Screw Size

								1/4"	0.313"	0.151"	0.414"	F	32	17 Ga.	Round	25	92597A120	0000


								5/16"	0.313"	0.151"	0.414"	F	32	17 Ga.	Round	25	92597A130	0000
								3/8"	0.313"	0.151"	0.414"	F	24	16 Ga.	Round	25	92597A900	0000
								3/8"	0.313"	0.151"	0.414"	F	32	17 Ga.	Round	25	92597A401	0000
								1/2"	0.313"	0.151"	0.414"	F	24	16 Ga.	Round	25	92597A110	0000
								1/2"	0.313"	0.151"	0.414"	F	32	17 Ga.	Round	25	92597A500	0000
								3/4"	0.313"	0.151"	0.414"	F	32	17 Ga.	Round	25	92597A140	00000

Grounding Splices

Join two grounding wires to extend the length of your grounding connection or connect to an existing ground wire.

For Wire Ga.	Material	Certification		Each
12, 11, 10, 9, 8, 7, 6	Bronze	UL Listed, CSA Certified	8598T13	00000
8, 7, 6	Bronze	UL Listed, CSA Certified	8598T12	0000
8, 7, 6, 5, 4, 3, 2, 1, 1/0	Bronze	UL Listed, CSA Certified	8598T14	0000
4	Bronze	UL Listed, CSA Certified	8598T11	0000

Grounding Hex Head Screws

Green so you know they're for grounding, these screws secure electrical connections. The flange creates a solid, flat contact surface for reliable conductivity. If there isn't enough room to turn them with a wrench, slip a screwdriver into their slotted drive. When using a wrench or socket, the head's six flat sides prevent slipping and rounding off the drive.

Head height includes the flange. Length is measured from under the flange.

Low-Strength Fastener—Suitable for light duty applications, such as securing access panels. These screws have a tensile strength of 60,000 psi and lower.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

		Head
	Lg.	Wd.	Ht.	Flange Dia.	Threading	Thread Spacing	Tensile Strength, psi	Pkg. Qty.		Pkg.
Low-Strength Green-Dyed Zinc-Plated Steel







				10-24

				3/8"	5/16"	5/32"	13/32"	Fully Threaded	Coarse	60,000	100	94441A110	000000


				1/2"	5/16"	5/32"	13/32"	Fully Threaded	Coarse	60,000	50	94441A120	0000
				3/4"	5/16"	5/32"	13/32"	Fully Threaded	Coarse	60,000	50	94441A130	0000




						10-32

						1/4"	5/16"	5/32"	13/32"	Fully Threaded	Fine	60,000	50	94441A140	0000


						3/8"	5/16"	5/32"	13/32"	Fully Threaded	Fine	60,000	50	94441A150	0000
						1/2"	5/16"	5/32"	13/32"	Fully Threaded	Fine	60,000	25	94441A160	0000
						3/4"	5/16"	5/32"	13/32"	Fully Threaded	Fine	60,000	50	94441A170	00000




								1/4"-20

								3/8"	3/8"	15/64"	33/64"	Fully Threaded	Coarse	60,000	50	94441A180	00000


								1/2"	3/8"	15/64"	33/64"	Fully Threaded	Coarse	60,000	50	94441A190	0000
								3/4"	3/8"	15/64"	33/64"	Fully Threaded	Coarse	60,000	25	94441A210	0000