Black Oxide Duct | McMaster-Carr

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1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

3,000 lb. to 9,999 lb.

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Threaded

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Steel

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Hex

Includes Mounting Plate

Yes

Number of Nuts Included

For U-Bolt ID

Mounting Plate Material

Steel

Export Control Classification Number (ECCN)

EAR99

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142 Products

U-Bolts with Mounting Plates

A mounting plate provides a more secure hold at the mounting surface. Stronger than routing clamps and hangers, U-bolts support heavy pipe, tube, and conduit from ceilings, walls, and poles.

Black-Oxide Steel—Black-oxide steel U-bolts have mild corrosion resistance.

	ID							Mounting Plate
	Inch	Metric, mm	For Pipe Size	Ht.	Thread Lg.	Wt. Cap., lb.	Ctr.-to-Ctr.	No. Included	Material	Lg.	Wd.	Thk.	No. of Nuts Included		Each
Black-Oxide Steel







				1/4"-20 Threads

				0.5625"	14	1/4	1 1/4"	3/4"	425	13/16"	1	Black-Oxide Steel	1 7/16"	3/4"	3/32"	2	0000000	00000


				0.75"	19	3/8	1 1/4"	5/8"	425	1"	1	Black-Oxide Steel	1 5/8"	3/4"	3/32"	2	0000000	0000
				0.75"	19	3/8	2 1/4"	1 1/2"	425	1"	1	Black-Oxide Steel	1 5/8"	3/4"	3/32"	2	0000000	0000
				1"	25	—	1 3/4"	1"	425	1 1/4"	1	Black-Oxide Steel	1 7/8"	3/4"	3/32"	2	0000000	0000
				1.125"	29	3/4	2"	1"	425	1 3/8"	1	Black-Oxide Steel	2"	3/4"	3/32"	2	0000000	0000
				1.25"	32	—	2 1/4"	1 1/4"	425	1 1/2"	1	Black-Oxide Steel	2 1/8"	3/4"	3/32"	2	0000000	0000
				1.5"	38	1	2 3/4"	1 3/8"	425	1 3/4"	1	Black-Oxide Steel	2 3/8"	3/4"	3/32"	2	0000000	0000
				1.75"	44	1 1/4	3"	1 3/8"	425	2"	1	Black-Oxide Steel	2 5/8"	3/4"	3/32"	2	0000000	0000
				2"	51	1 1/2	3 1/4"	1 3/8"	425	2 1/4"	1	Black-Oxide Steel	2 7/8"	3/4"	3/32"	2	0000000	0000




						5/16"-18 Threads

						1"	25	—	2 3/16"	1 3/8"	600	1 5/16"	1	Black-Oxide Steel	2 1/16"	3/4"	3/32"	2	0000000	0000


						1.375"	35	1	2 3/16"	1"	600	1 11/16"	1	Black-Oxide Steel	2 7/16"	3/4"	3/32"	2	0000000	0000
						1.5"	38	1	2 3/16"	1"	600	1 13/16"	1	Black-Oxide Steel	2 9/16"	3/4"	3/32"	2	0000000	0000
						1.75"	44	1 1/4	2 11/16"	1 1/8"	600	2 1/16"	1	Black-Oxide Steel	2 13/16"	3/4"	3/32"	2	0000000	0000
						2"	51	1 1/2	2 11/16"	1"	600	2 5/16"	1	Black-Oxide Steel	3 1/16"	3/4"	3/32"	2	0000000	0000
						2.5"	64	2	3 3/16"	1"	600	2 13/16"	1	Black-Oxide Steel	3 9/16"	3/4"	3/32"	2	0000000	0000
						3"	76	2 1/2	3 11/16"	1"	600	3 5/16"	1	Black-Oxide Steel	4 1/16"	3/4"	3/32"	2	0000000	0000




								3/8"-16 Threads

								1"	25	—	2 1/4"	1 1/4"	1,075	1 3/8"	1	Black-Oxide Steel	2 1/4"	1"	1/8"	2	0000000	0000


								1.25"	32	—	2 1/4"	1 1/4"	1,075	1 5/8"	1	Black-Oxide Steel	2 1/2"	1"	1/8"	2	0000000	0000
								1.5"	38	1	2 1/2"	1 1/4"	1,075	1 7/8"	1	Black-Oxide Steel	2 3/4"	1"	1/8"	2	0000000	0000
								1.75"	44	1 1/4	2 3/4"	1 1/8"	1,075	2 1/8"	1	Black-Oxide Steel	3"	1"	1/8"	2	0000000	0000
								2"	51	1 1/2	2 5/8"	1 1/4"	1,075	2 3/8"	1	Black-Oxide Steel	3 1/4"	1"	1/8"	2	0000000	0000
								2.5"	64	2	3 1/8"	1 1/4"	1,075	2 7/8"	1	Black-Oxide Steel	3 3/4"	1"	1/8"	2	0000000	0000
								3"	76	2 1/2	3 5/8"	1 1/4"	1,075	3 3/8"	1	Black-Oxide Steel	4 1/4"	1"	1/8"	2	0000000	0000
								3.5"	89	3	4 1/8"	1 1/4"	1,075	3 7/8"	1	Black-Oxide Steel	4 3/4"	1"	1/8"	2	0000000	0000




										1/2"-13 Threads

										3"	76	2 1/2	4 1/2"	1 5/8"	2,000	3 1/2"	1	Black-Oxide Steel	4 5/8"	1"	1/8"	2	0000000	0000


										3.5"	89	3	5"	1 1/2"	2,000	4"	1	Black-Oxide Steel	5 1/8"	1"	1/8"	2	0000000	0000
										4"	102	3 1/2	5 1/2"	1 1/2"	2,000	4 1/2"	1	Black-Oxide Steel	5 5/8"	1"	1/8"	2	0000000	0000
										4.5"	114	4	6"	1 1/2"	2,000	5"	1	Black-Oxide Steel	6 1/8"	1"	1/8"	2	0000000	0000

U-Bolt Plates

Add a mounting plate to your U-bolt for a more secure hold at the mounting surface.

Black-Oxide Steel—Black-oxide steel mounting plates have mild corrosion resistance.

	Lg.	Wd.	Thk.	Ctr.-to-Ctr.	Pkg. Qty.		Pkg.
Black-Oxide Steel







			For 1/4"-20 Thread

			9/16"	1 7/16"	3/4"	3/32"	13/16"	5	00000000	00000


			3/4"	1 5/8"	3/4"	3/32"	1"	5	00000000	0000
			1"	1 7/8"	3/4"	3/32"	1 1/4"	5	00000000	0000
			1 1/8"	2"	3/4"	3/32"	1 3/8"	5	00000000	0000
			1 1/4"	2 1/8"	3/4"	3/32"	1 1/2"	5	00000000	0000
			1 1/2"	2 3/8"	3/4"	3/32"	1 3/4"	5	00000000	0000
			1 3/4"	2 5/8"	3/4"	3/32"	2"	5	00000000	0000
			2"	2 7/8"	3/4"	3/32"	2 1/4"	5	00000000	0000




					For 5/16"-18 Thread

					1"	2 1/16"	3/4"	3/32"	1 5/16"	5	00000000	0000


					1 3/8"	2 7/16"	3/4"	3/32"	1 11/16"	5	00000000	0000
					1 1/2"	2 9/16"	3/4"	3/32"	1 13/16"	5	00000000	0000
					1 3/4"	2 13/16"	3/4"	3/32"	2 1/16"	5	00000000	0000
					2"	3 1/16"	3/4"	3/32"	2 5/16"	5	00000000	0000
					2 1/2"	3 9/16"	3/4"	3/32"	2 13/16"	5	00000000	0000
					3"	4 1/16"	3/4"	3/32"	3 5/16"	5	00000000	0000




							For 3/8"-16 Thread

							1"	2 1/4"	1"	1/8"	1 3/8"	5	00000000	0000


							1 1/4"	2 1/2"	1"	1/8"	1 5/8"	5	00000000	0000
							1 1/2"	2 3/4"	1"	1/8"	1 7/8"	5	00000000	0000
							1 3/4"	3"	1"	1/8"	2 1/8"	5	00000000	0000
							2"	3 1/4"	1"	1/8"	2 3/8"	5	00000000	0000
							2 1/2"	3 3/4"	1"	1/8"	2 7/8"	5	00000000	0000
							3"	4 1/4"	1"	1/8"	3 3/8"	5	00000000	0000
							3 1/2"	4 3/4"	1"	1/8"	3 7/8"	5	00000000	0000




									For 1/2"-13 Thread

									3"	4 5/8"	1"	1/8"	3 1/2"	5	00000000	0000


									3 1/2"	5 1/8"	1"	1/8"	4"	1	00000000	0000
									4"	5 5/8"	1"	1/8"	4 1/2"	1	00000000	0000
									4 1/2"	6 1/8"	1"	1/8"	5"	1	00000000	0000
									5 5/8"	7 3/4"	1"	1/8"	6 1/8"	1	00000000	0000
									6 3/4"	8 3/8"	1"	1/8"	7 1/4"	1	00000000	0000
8 3/4"									10 1/4"	1"	1/8"	9 1/4"	1	00000000	0000




	For 5/8"-11 Thread

	6 3/4"	9 3/8"							1"	1/8"	7 3/8"	1	00000000	0000


	8 3/4"	10 3/8"							1"	1/8"	9 3/8"	1	00000000	00000




									For 3/4"-10 Thread

									10 7/8"	13 1/4"	1 5/8"	1/4"	11 5/8"	1	00000000	00000




			For 7/8"-9 Thread

			12 7/8"	15 5/8"							2 1/2"	1/4"	13 1/4"	1	00000000	00000


			14 1/8"	16 7/8"							2 1/2"	1/4"	15"	1	00000000	00000
			16 1/8"	18 7/8"							2 1/2"	1/4"	17"	1	00000000	00000




											For 1"-8 Thread

											18 1/8"	21 1/4"	2 1/2"	1/4"	19 1/8"	1	00000000	00000

Square U-Bolts

Suspend and route flat-bottomed objects such as strut channel and small duct.

Black-Oxide Steel—Black-oxide steel U-bolts have mild corrosion resistance.

								Black-Oxide Steel
	Inside Wd.	Ht.	Thread Lg.	Wt. Cap., lb.	Ctr.-to-Ctr.	No. of Nuts Included	No. of Washers Included		Each
3/8"-16 Threads



		2"	2 5/8"	1 1/2"	1,075	2 3/8"	2	2	00000000	00000


		2"	4 5/8"	3"	1,075	2 3/8"	2	2	00000000	0000
		2"	6 5/8"	3 3/4"	1,075	2 3/8"	2	2	00000000	0000
		3"	2 5/8"	1 1/2"	1,075	3 3/8"	2	2	00000000	0000
		3"	4 5/8"	3"	1,075	3 3/8"	2	2	00000000	0000
		3"	6 5/8"	3 3/4"	1,075	3 3/8"	2	2	00000000	0000
		4"	2 5/8"	1 1/2"	1,075	4 3/8"	2	2	00000000	0000
		4"	4 5/8"	3"	1,075	4 3/8"	2	2	00000000	0000
		4"	6 5/8"	3 3/4"	1,075	4 3/8"	2	2	00000000	0000
		5"	4 5/8"	1 1/2"	1,075	5 3/8"	2	2	00000000	0000
		5"	6 5/8"	3"	1,075	5 3/8"	2	2	00000000	0000


		5"	8 5/8"	3 3/4"	1,075	5 3/8"	2	2	00000000	0000
		6"	4 5/8"	3"	1,075	6 3/8"	2	2	00000000	0000
		6"	6 5/8"	3 3/4"	1,075	6 3/8"	2	2	00000000	0000
		6"	8 5/8"	5 5/8"	1,075	6 3/8"	2	2	00000000	0000
		7"	6 5/8"	3"	1,075	7 3/8"	2	2	00000000	0000
		7"	8 5/8"	3 3/4"	1,075	7 3/8"	2	2	00000000	0000
		7"	10 5/8"	5 5/8"	1,075	7 3/8"	2	2	00000000	0000


		1/2"-13 Threads



				2"	2 5/8"	1 1/2"	2,000	2 1/2"	2	2	00000000	0000


				2"	4 5/8"	3"	2,000	2 1/2"	2	2	00000000	0000
				2"	6 5/8"	3 3/4"	2,000	2 1/2"	2	2	00000000	00000
				3"	2 5/8"	1 1/2"	2,000	3 1/2"	2	2	00000000	0000
				3"	4 5/8"	3"	2,000	3 1/2"	2	2	00000000	0000
				3"	6 5/8"	3 3/4"	2,000	3 1/2"	2	2	00000000	00000
				4"	2 5/8"	1 1/2"	2,000	4 1/2"	2	2	00000000	0000
				4"	4 5/8"	3"	2,000	4 1/2"	2	2	00000000	00000
				4"	6 5/8"	3 3/4"	2,000	4 1/2"	2	2	00000000	00000
				5"	4 5/8"	1 1/2"	2,000	5 1/2"	2	2	00000000	00000
				5"	6 5/8"	3"	2,000	5 1/2"	2	2	00000000	00000


				5"	8 5/8"	3 3/4"	2,000	5 1/2"	2	2	00000000	00000
				6"	4 5/8"	3"	2,000	6 1/2"	2	2	00000000	00000
				6"	6 5/8"	3 3/4"	2,000	6 1/2"	2	2	00000000	00000
				6"	8 5/8"	5 5/8"	2,000	6 1/2"	2	2	00000000	00000
				7"	6 5/8"	3"	2,000	7 1/2"	2	2	00000000	00000
				7"	8 5/8"	3 3/4"	2,000	7 1/2"	2	2	00000000	00000
				7"	10 5/8"	5 5/8"	2,000	7 1/2"	2	2	00000000	00000
				8"	4 5/8"	3"	2,000	8 1/2"	2	2	00000000	00000
				8"	6 5/8"	3 3/4"	2,000	8 1/2"	2	2	00000000	00000
				8"	8 5/8"	5 5/8"	2,000	8 1/2"	2	2	00000000	00000

U-Bolts

Stronger than routing clamps and hangers, U-bolts support heavy pipe, tube, and conduit from ceilings, walls, and poles.

Black-Oxide Steel—Black-oxide steel U-bolts have mild corrosion resistance.

	U-Bolts											Mounting Plates
	ID
	Inch	Metric, mm	For Pipe Size	Ht.	Thread Lg.	Wt. Cap., lb.	Ctr.-to-Ctr.	No. of Nuts Included	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
Black-Oxide Steel







				1/4"-20 Threads

				0.5625"	14	1/4	1 1/4"	3/4"	425	13/16"	2	5	0000000	00000	5	00000000	00000


				0.75"	19	3/8	1 1/4"	5/8"	425	1"	2	5	0000000	0000	5	00000000	0000
				0.75"	19	3/8	2 1/4"	1 1/2"	425	1"	2	5	0000000	0000	5	00000000	0000
				1"	25	—	1 3/4"	1"	425	1 1/4"	2	5	0000000	0000	5	00000000	0000
				1.125"	29	3/4	2"	1"	425	1 3/8"	2	5	0000000	0000	5	00000000	0000
				1.25"	32	—	2 1/4"	1 1/4"	425	1 1/2"	2	5	0000000	0000	5	00000000	0000
				1.5"	38	1	2 3/4"	1 3/8"	425	1 3/4"	2	5	0000000	0000	5	00000000	0000
				1.75"	44	1 1/4	3"	1 3/8"	425	2"	2	5	0000000	0000	5	00000000	0000
				2"	51	1 1/2	3 1/4"	1 3/8"	425	2 1/4"	2	5	0000000	0000	5	00000000	0000




						5/16"-18 Threads

						1"	25	—	2 3/16"	1 3/8"	600	1 5/16"	2	5	0000000	0000	5	00000000	0000


						1.375"	35	1	2 3/16"	1"	600	1 11/16"	2	1	0000000	0000	5	00000000	0000
						1.5"	38	1	2 3/16"	1"	600	1 13/16"	2	1	0000000	0000	5	00000000	0000
						1.75"	44	1 1/4	2 11/16"	1 1/8"	600	2 1/16"	2	1	0000000	0000	5	00000000	0000
						2"	51	1 1/2	2 11/16"	1"	600	2 5/16"	2	1	0000000	0000	5	00000000	0000
						2.5"	64	2	3 3/16"	1"	600	2 13/16"	2	1	0000000	0000	5	00000000	0000
						3"	76	2 1/2	3 11/16"	1"	600	3 5/16"	2	1	0000000	0000	5	00000000	0000




								3/8"-16 Threads

								1"	25	—	2 1/4"	1 1/4"	1,075	1 3/8"	2	1	0000000	0000	5	00000000	0000


								1.25"	32	—	2 1/4"	1 1/4"	1,075	1 5/8"	2	1	0000000	0000	5	00000000	0000
								1.5"	38	1	2 1/2"	1 1/4"	1,075	1 7/8"	2	1	0000000	0000	5	00000000	0000
								1.75"	44	1 1/4	2 3/4"	1 1/8"	1,075	2 1/8"	2	1	0000000	0000	5	00000000	0000
								2"	51	1 1/2	2 5/8"	1 1/4"	1,075	2 3/8"	2	1	0000000	0000	5	00000000	0000
								2.5"	64	2	3 1/8"	1 1/4"	1,075	2 7/8"	2	1	0000000	0000	5	00000000	0000
								3"	76	2 1/2	3 5/8"	1 1/4"	1,075	3 3/8"	2	1	0000000	0000	5	00000000	0000
								3.5"	89	3	4 1/8"	1 1/4"	1,075	3 7/8"	2	1	0000000	0000	5	00000000	0000




										1/2"-13 Threads

										3"	76	2 1/2	4 1/2"	1 5/8"	2,000	3 1/2"	2	1	0000000	0000	5	00000000	0000


										3.5"	89	3	5"	1 1/2"	2,000	4"	2	1	0000000	0000	1	00000000	0000
										4"	102	3 1/2	5 1/2"	1 1/2"	2,000	4 1/2"	2	1	0000000	0000	1	00000000	0000
										4.5"	114	4	6"	1 1/2"	2,000	5"	2	1	0000000	0000	1	00000000	0000
										5.625"	143	5	7 1/4"	2"	2,000	6 1/8"	2	1	0000000	0000	1	00000000	0000
6.75"										171	6	8 3/8"	2"	2,000	7 1/4"	2	1	0000000	0000	1	00000000	0000
8.75"	222									8	10 3/8"	2"	2,000	9 1/4"	2	1	0000000	00000	1	00000000	0000




		5/8"-11 Threads

		6.75"	171							6	9 1/2"	3 3/4"	3,225	7 3/8"	2	1	00000000	00000	1	00000000	0000


		8.75"	222							8	11 1/8"	3 3/4"	3,225	9 3/8"	2	1	00000000	00000	1	00000000	00000




										3/4"-10 Threads

										10.875"	—	10	13 13/16"	4"	4,825	11 5/8"	2	1	00000000	00000	1	00000000	00000




				7/8"-9 Threads

				12.875"	327							12	16 1/16"	4 1/4"	6,725	13 3/4"	2	1	00000000	00000	1	00000000	00000


				14.125"	359							14	17 5/16"	4 1/4"	6,725	15"	2	1	00000000	00000	1	00000000	00000
				16.125"	410							16	19 5/16"	4 1/4"	6,725	17"	2	1	00000000	00000	1	00000000	00000




												1"-8 Threads

												18.125"	460	18	21 11/16"	4 3/4"	8,850	19 1/8"	2	1	00000000	000000	1	00000000	00000