FMC Fittings | McMaster-Carr

Filter by

Conduit Type

Conduit Trade Size

Conduit Connection

Shape

Fitting Type

Material

Fitting Connection

System of Measurement

Pipe Size

Connects To

For Conduit Flexibility

Flexibility

Thread Type

Gender

For Armored Cable Gauge

Length

Knockout Trade Size

Thread Size

Environment

RoHS

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Not Compliant

Export Control Classification Number (ECCN)

EAR99

Forward

How can we improve?

186 Products

About Conduit

Compare rigid and flexible conduit materials and identify the trade size for compatible fittings.

Flexible Metal (FMC) Conduit and Fittings

Make tight bends and protect wiring from being crushed. This corrugated conduit snakes around corners where rigid metal conduit won’t fit. For use indoors, it’s ideal for short connections or runs through walls in spaces that require both flexibility and durability.

Conduit

Run wiring through conduit to route and protect it.

Bend and Stay—Flex this conduit and it stays routed in position. It is not designed for repeated bending, which can weaken the construction.

Galvanized Steel—Strong and resists rust and mild chemicals.

Zinc-Plated Steel—The strength of steel with a plating that protects from occasional exposure to moisture.

304 Stainless Steel—The choice for wet and outdoor environments.

Aluminum—One-third the weight of steel that's the same size. Aluminum is also nonmagnetic to prevent electrical interference in nearby equipment.

						Per Ft.
	Conduit Trade Size	Bend Radius	Specs. Met	Choose a Length, ft.		1-99	100-Up
Flexible







				Zinc-Plated Steel

				5/16	4"	UL Recognized Component	10, 25, 50, 100	74115K1	00000	00000


				3/8	2"	UL Listed	10, 25, 50, 100	74115K2	0000	0000
				1/2	3"	UL Listed	10, 25, 50, 100	74115K3	0000	0000
				3/4	4"	UL Listed	10, 25, 50, 100	74115K4	0000	0000
				1	5"	UL Listed	5, 10, 25, 50	74115K5	0000	0000
				1 1/4	6"	UL Listed	5, 10, 25, 50	74115K6	0000	0000
				1 1/2	8"	UL Listed	5, 10, 25	74115K7	0000	0000
				2	10"	UL Listed	5, 10, 25	74115K8	0000	0000




						304 Stainless Steel

						3/8	1"	—	5, 10, 25	3994K11	0000	0000


						1/2	2"	—	5, 10, 25	3994K12	0000	0000
						3/4	2"	—	5, 10, 25	3994K13	0000	0000
						1	2"	—	2, 5, 10, 25	3994K14	0000	0000
						1 1/4	2"	—	2, 5, 10, 25	3994K15	0000	0000




								Aluminum

								5/16	2"	UL Recognized Component	10, 25, 50, 100	73145K1	0000	0000


								3/8	2"	UL Listed	10, 25, 50, 100	73145K2	0000	0000
								1/2	3"	UL Listed	10, 25, 50, 100	73145K3	0000	0000
								3/4	4"	UL Listed	10, 25, 50, 100	73145K4	0000	0000
								1	5"	UL Listed	10, 25, 50	73145K5	0000	0000
								1 1/4	6"	UL Listed	5, 10, 25, 50	73145K6	0000	0000
								1 1/2	8"	UL Listed	5, 10, 25	73145K7	0000	0000
								2	10"	UL Listed	5, 10, 25	73145K8	0000	0000


								Bend and Stay







												Galvanized Steel

												3/8	2"	—	5, 10, 25, 50, 100	74115K91	0000	0000


												1/2	3"	—	5, 10, 25, 50, 100	74115K92	0000	0000
3/4												3"	—	5, 10, 25, 50, 100	74115K93	0000	0000
1	4"											—	5, 10, 25, 50	74115K94	0000	0000
1 1/4	5"											—	5, 10, 25, 50	74115K95	0000	0000
1 1/2	6"											—	5, 10, 25	74115K96	0000	0000
2	8"											—	2, 5, 10, 25	74115K97	0000	0000

Straight Conduit Connectors

Twist-In

Connection

Join lengths of conduit to create a continuous run.

Zinc Alloy—A good option for light duty applications that don't require high strength. These fittings resist occasional exposure to moisture.

316 Stainless Steel—Our most corrosion-resistant fittings won't degrade when exposed to salt water and harsh chemicals.

		Each
Twist-In Conduit Connection







	Zinc Alloy

	1/2	Male	CSA Certified, UL Listed	8180K11	00000


	3/4	Male	CSA Certified, UL Listed	8180K12	0000
	1	Male	CSA Certified, UL Listed	8180K13	0000
	1 1/4	Male	CSA Certified, UL Listed	8180K14	0000
	1 1/2	Male	CSA Certified, UL Listed	8180K15	0000
	2	Male	CSA Certified, UL Listed	8180K16	00000




			316 Stainless Steel

			1/2	Male	—	8533K41	0000


			3/4	Male	—	8533K42	0000
			1	Male	—	8533K43	00000

Straight Electrical Box Connectors


Screw-Clamp × Threaded	Screw-Clamp × Snap-In	Push-In × Snap-In

Screw-On × Threaded	Twist-In × Threaded

Attach conduit to a knockout in an electrical box.

Zinc-Plated Steel—The strength of steel with a plating that protects from occasional exposure to moisture.

Zinc-Plated Iron—Resist occasional exposure to moisture but not as strong as zinc‑plated steel.

Zinc Alloy—A good option for light duty applications that don't require high strength. These fittings resist occasional exposure to moisture.

316 Stainless Steel—Our most corrosion-resistant fittings won't degrade when exposed to salt water and harsh chemicals.

Aluminum—One-third the weight of steel that's the same size. Aluminum is also nonmagnetic to prevent electrical interference in nearby equipment.

	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Pipe Size	Thread Type	Knockout Trade Size	Gender	Includes	Specs. Met		Each
Screw-Clamp Conduit Connection × Threaded Knockout Connection







				Zinc-Plated Iron

				3/8	Female	1/2	NPSM	—	Male	Locknut	UL Listed	7920K81	00000


				1/2	Female	1/2	NPSM	—	Male	Locknut	UL Listed	7920K82	0000
				3/4	Female	3/4	NPSM	—	Male	Locknut	UL Listed	7920K83	0000
				1	Female	1	NPT	—	Male	Locknut	UL Listed	7920K84	0000
				1 1/4	Female	1 1/4	NPT	—	Male	Locknut	UL Listed	7920K85	0000
				1 1/2	Female	1 1/2	NPT	—	Male	Locknut	UL Listed	7920K86	00000
				2	Female	2	NPT	—	Male	Locknut	UL Listed	7920K87	00000




						Zinc Alloy

						3/8	Female	1/2	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K26	0000


						3/8	Female	1/2	NPSM	—	Male	Locknut, Two Screws	CSA Certified, UL Listed	8180K21	0000
						1/2	Female	1/2	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K27	0000
						3/4	Female	3/4	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K28	0000
						1	Female	1	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7267K21	0000
						1 1/4	Female	1 1/4	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7267K22	00000
						1 1/2	Female	1 1/2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7267K11	00000
						2	Female	2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7267K12	00000




								316 Stainless Steel

								3/8	Female	1/2	NPSM	—	Male	Locknut	—	8533K11	00000


								1/2	Female	1/2	NPSM	—	Male	Locknut	—	8533K12	00000
								3/4	Female	3/4	NPSM	—	Male	Locknut	—	8533K13	00000
								1	Female	1	NPSM	—	Male	Locknut	—	8533K14	00000
								1 1/4	Female	1 1/4	NPSM	—	Male	Locknut	—	8533K15	00000


								Screw-Clamp Conduit Connection × Snap-In Knockout Connection







												Zinc Alloy

												3/8	Female	—	—	1/2	Male	—	CSA Certified, UL Listed	8180K31	0000


												1/2	Female	—	—	1/2	Male	—	CSA Certified, UL Listed	8180K32	0000
												3/4	Female	—	—	3/4	Male	—	CSA Certified, UL Listed	8180K33	0000


Push-In Conduit Connection × Snap-In Knockout Connection







												Zinc Alloy

												3/8	Female	—	—	1/2	Male	—	CSA Certified, UL Listed	7969K21	0000


												Screw-On Conduit Connection × Threaded Knockout Connection







														Zinc-Plated Steel

														3/8	Female	1/2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K51	0000


														1/2	Female	1/2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K41	0000
														3/4	Female	3/4	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K43	00000
														1	Female	1	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K52	00000
														2	Female	2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K53	00000




																Aluminum

						1/2	Female									1/2	NPSM	—	Male	Locknut	C-UL Listed, UL Listed	7969K42	0000


						Twist-In Conduit Connection × Threaded Knockout Connection







																		Zinc Alloy

																		3/8	Male	1/2	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K51	0000


								1/2	Male									1/2	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K52	0000
								3/4	Male									3/4	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K53	0000
								1	Male									1	NPSM	—	Male	Locknut	CSA Certified, UL Listed	7267K54	0000
								1 1/4	Male	1 1/4	NPSM							—	Male	Locknut	CSA Certified, UL Listed	7267K55	00000
								1 1/2	Male	1 1/2	NPSM							—	Male	Locknut	CSA Certified, UL Listed	7267K13	00000
								2	Male	2	NPSM							—	Male	Locknut	CSA Certified, UL Listed	7267K14	00000




										316 Stainless Steel

										3/8	Male							1/2	NPSM	—	Male	Locknut	—	8533K21	00000


1/2	Male									1/2	NPSM							—	Male	Locknut	—	8533K22	00000
3/4	Male									3/4	NPSM							—	Male	Locknut	—	8533K23	00000
1	Male									1	NPSM							—	Male	Locknut	—	8533K24	00000
1 1/4	Male	1 1/4								NPSM	—							Male	Locknut	—	8533K25	00000

90° Elbow Electrical Box Connectors

Screw-Clamp ×

Threaded

Change the direction of your run to connect to a knockout in an electrical box.

Zinc-Plated Iron—Resist occasional exposure to moisture but not as strong as zinc‑plated steel.

Zinc Alloy—A good option for light duty applications that don't require high strength. These fittings resist occasional exposure to moisture.

316 Stainless Steel—Our most corrosion-resistant fittings won't degrade when exposed to salt water and harsh chemicals.

	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Pipe Size	Thread Type	Gender	Includes	Specs. Met		Each
Screw-Clamp Conduit Connection × Threaded Knockout Connection







				Zinc-Plated Iron

				3/8	Female	1/2	NPSM	Male	Locknut	UL Listed	7920K71	00000


				1/2	Female	1/2	NPSM	Male	Locknut	UL Listed	7920K72	0000
				3/4	Female	3/4	NPSM	Male	Locknut	UL Listed	7920K73	0000
				1	Female	1	NPSM	Male	Locknut	UL Listed	7920K74	00000
				1 1/4	Female	1 1/4	NPSM	Male	Locknut	UL Listed	7920K75	00000
				1 1/2	Female	1 1/2	NPSM	Male	Locknut	UL Listed	7920K76	00000
				2	Female	2	NPSM	Male	Locknut	UL Listed	7920K77	00000




						Zinc Alloy

						3/8	Female	1/2	NPSM	Male	Locknut	C-UL Listed, UL Listed	7267K63	0000


						3/8	Female	1/2	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K33	0000
						1/2	Female	1/2	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K34	0000
						3/4	Female	3/4	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K35	0000
						1	Female	1	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K36	00000
						1 1/4	Female	1 1/4	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K37	00000
						1 1/2	Female	1 1/2	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K15	00000
						2	Female	2	NPSM	Male	Locknut	CSA Certified, UL Listed	7267K16	00000




								316 Stainless Steel

								3/8	Female	1/2	NPSM	Male	Locknut	—	8533K31	00000


								1/2	Female	1/2	NPSM	Male	Locknut	—	8533K32	00000
								3/4	Female	3/4	NPSM	Male	Locknut	—	8533K33	00000
								1	Female	1	NPSM	Male	Locknut	—	8533K34	00000
								1 1/4	Female	1 1/4	NPSM	Male	Locknut	—	8533K35	00000

Wye Electrical Box Connectors


Screw-Clamp × Threaded	Screw-Clamp × Snap-In	Push-In × Snap-In

Join two pieces of conduit to one knockout.

Zinc Alloy—A good option for light duty applications that don't require high strength. These fittings resist occasional exposure to moisture.

	Conduit Connection		Knockout Connection
	Conduit Trade Size	Gender	Pipe Size	Thread Type	Knockout Trade Size	Gender	Includes	Specs. Met		Each
Screw-Clamp Conduit Connection × Threaded Knockout Connection







				Zinc Alloy

				3/8	Female	1/2	NPSM	—	Male	Locknut	CSA Certified, UL Listed	8180K22	00000


				Screw-Clamp Conduit Connection × Snap-In Knockout Connection







								Zinc Alloy

								3/8	Female	—	—	1/2	Male	—	CSA Certified, UL Listed	8180K34	0000


								Push-In Conduit Connection × Snap-In Knockout Connection







												Zinc Alloy

												3/8	Female	—	—	1/2	Male	—	CSA Certified, UL Listed	7969K31	0000

Conduit Grommets

Push-In

Connection

Protect wire from sharp edges as you pull it through by adding these grommets to the ends of conduit.

	Pkg. Qty.		Pkg.
Push-In Conduit Connection







	Plastic

	5/16	Female	Red	100	8216K41	000000


	3/8	Female	Red	100	8216K42	00000
	7/16	Female	Red	50	8216K43	00000
	1/2	Female	Red	50	8216K44	00000
	3/4	Female	Red	50	8216K45	00000
	1	Female	Red	1	8216K511	0000
	1 1/4	Female	Red	10	8216K512	00000
	1 1/2	Female	Red	10	8216K513	00000
	2	Female	Red	1	8216K514	0000

Conduit Adapters

Compression ×

Twist-In

Conduit

Connection

Screw-Clamp

Conduit

Connection

For transition points in your run, these adapters link different conduit types.

Zinc Alloy—A good option for light duty applications that don't require high strength. These fittings resist occasional exposure to moisture.

	Conduit Connection
	Conduit Trade Size	Gender	For Conduit Flexibility	Material	Specs. Met		Each
Compression × Twist-In Conduit Connection







				EMT × FMC

				1/2	Female × Male	Rigid × Flexible	Zinc Alloy	UL Listed	7984K11	00000


				3/4	Female × Male	Rigid × Flexible	Zinc Alloy	UL Listed	7984K12	0000
				1	Female × Male	Rigid × Flexible	Zinc Alloy	UL Listed	7984K13	0000


				Screw-Clamp Conduit Connection







								EMT × FMC

								1/2 × 3/8	Female	Rigid × Flexible	Zinc Alloy	—	7984K1	0000


								1/2	Female	Rigid × Flexible	Zinc Alloy	UL Listed	7984K2	0000
								3/4	Female	Rigid × Flexible	Zinc Alloy	UL Listed	7984K3	0000
								1	Female	Rigid × Flexible	Zinc Alloy	UL Listed	7984K27	0000

Conduit Locknuts

Secure threaded conduit fittings to knockouts. These locknuts keep fittings from shifting, so connections stay stable and wiring is protected inside electrical boxes or enclosures.

For Metal and Plastic Fittings

Locknut with

PVC Molded

Gasket

Locknut

with

Serrated

Facing

Zinc-Plated Steel—The strength of steel with a plating that protects from occasional exposure to moisture.

304 Stainless Steel—The choice for wet and outdoor environments.

316 Stainless Steel—Our most corrosion-resistant fittings won't degrade when exposed to salt water and harsh chemicals.

Aluminum—One-third the weight of steel that's the same size. Aluminum is also nonmagnetic to prevent electrical interference in nearby equipment.

Nickel-Plated Brass—The plating enhances the corrosion resistance of brass, adding a durable protective finish.

PVC Molded Gasket—Creates a seal for moisture protection.

Serrated Facing—Grips the material surface for added stability.

	Pipe Size	Thread Size	Features	Specs. Met	Pkg. Qty.		Pkg.
NPSM Thread







				Zinc-Plated Steel

				1/2	—	—	CSA Certified, UL Listed	10	7513K241	00000


				1/2	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K311	0000
				1/2	—	Serrated Facing	CSA Certified, UL Listed	1	7513K119	0000
				3/4	—	—	CSA Certified, UL Listed	10	7513K242	0000
				3/4	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K312	0000
				3/4	—	Serrated Facing	CSA Certified, UL Listed	1	7513K129	0000
				1	—	—	CSA Certified, UL Listed	10	7513K243	0000
				1	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K313	0000
				1	—	Serrated Facing	CSA Certified, UL Listed	1	7513K121	0000
				1 1/4	—	—	CSA Certified, UL Listed	10	7513K244	0000
				1 1/4	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K314	0000


				1 1/4	—	Serrated Facing	CSA Certified, UL Listed	1	7513K122	0000
				1 1/2	—	—	CSA Certified, UL Listed	10	7513K245	00000
				1 1/2	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K315	0000
				1 1/2	—	Serrated Facing	CSA Certified, UL Listed	1	7513K123	0000
				2	—	—	CSA Certified, UL Listed	10	7513K246	00000
				2	—	PVC Molded Gasket	CSA Certified, UL Listed	2	7513K316	00000
				2	—	Serrated Facing	CSA Certified, UL Listed	1	7513K124	0000
				2 1/2	—	—	CSA Certified	1	7513K111	0000
				2 1/2	—	PVC Molded Gasket	CSA Certified	1	7513K115	00000
				2 1/2	—	Serrated Facing	CSA Certified	1	7513K125	00000


				3	—	—	CSA Certified	1	7513K112	0000
				3	—	PVC Molded Gasket	CSA Certified	1	7513K116	00000
				3	—	Serrated Facing	CSA Certified	1	7513K126	00000
				3 1/2	—	—	CSA Certified	1	7513K113	0000
				3 1/2	—	PVC Molded Gasket	CSA Certified	1	7513K117	00000
				4	—	—	CSA Certified	1	7513K114	0000
				4	—	Serrated Facing	CSA Certified	1	7513K128	00000




						Aluminum

						1/2	—	—	—	1	9147T123	0000


						3/4	—	—	—	1	9147T124	0000
						1	—	—	—	1	9147T125	0000
						1 1/4	—	—	—	1	9147T126	0000
						1 1/2	—	—	—	1	9147T127	00000
						2	—	—	—	1	9147T128	00000


						NPSL Thread







								316 Stainless Steel

		1/2						—	—	C-UL Listed, UL Listed	1	7513K317	00000


		3/4	—					—	C-UL Listed, UL Listed	1	7513K318	00000
		1	—					—	C-UL Listed, UL Listed	1	7513K319	00000
		1 1/4	—					—	C-UL Listed, UL Listed	1	7513K411	00000
		1 1/2	—					—	C-UL Listed, UL Listed	1	7513K412	00000
		2	—					—	C-UL Listed, UL Listed	1	7513K413	00000
		3	—					—	C-UL Listed, UL Listed	1	7513K152	00000
		4	—					—	C-UL Listed, UL Listed	1	7513K153	00000


		PG Thread







										304 Stainless Steel

										—	PG-7	—	—	1	7513K141	0000


										—	PG-9	—	—	1	7513K142	00000
										—	PG-11	—	—	1	7513K143	0000
										—	PG-13.5	—	—	1	7513K144	00000
										—	PG-16	—	—	1	7513K145	00000
										—	PG-21	—	—	1	7513K146	00000
										—	PG-29	—	—	1	7513K147	00000
										—	PG-36	—	—	1	7513K148	00000


										Metric Thread







					304 Stainless Steel

					—								M8	—	—	1	7513K131	0000


					—								M12	—	—	1	7513K133	00000
					—								M16	—	—	1	7513K134	00000
					—								M20	—	—	1	7513K135	00000
					—								M25	—	—	1	7513K136	00000
					—								M32	—	—	1	7513K137	00000
					—								M40	—	—	1	7513K138	00000
					—								M50	—	—	1	7513K139	00000
					—								M63	—	—	1	7513K149	00000




							Nickel-Plated Brass

—	M12						—						EN 60204	1	9147T17	0000


—	M16						—						EN 60204	1	9147T18	0000
—	M20						—						EN 60204	1	9147T19	0000
—	M25						—						EN 60204	1	9147T111	0000
—	M32						—						EN 60204	1	9147T21	0000
—	M40						—						EN 60204	1	9147T22	00000
—	M50						—						EN 60204	1	9147T23	00000
—	M63						—						EN 60204	1	9147T112	00000

Conduit Locknut and Reaming Pliers

Tighten locknuts and ream both the inside and outside of conduit with one tool. These pliers have combination jaws with multiple curved openings to work with _1/2" (13 mm) and _3/4" (19 mm) EMT conduit locknuts and _1/2" rigid conduit locknuts and flat nuts. Their machined nose fits snugly into locknut wings. They can also pull wire and fish tape, thanks to their serrated jaws. Pliers have plastic grips for comfort.

		Jaw
	Overall Lg.	Max. Cap.	Lg.	Opening Style	Texture	Material	For Tape Shape	With Wire Cutter		Each
Combination Jaw and Cushion Grip



		7 3/4"	1 3/8"	1 5/8"	Manual	Serrated	Steel	Flat	No	4642N11	000000