Black Oxide U-Bolts | McMaster-Carr

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System of Measurement

Height

Center-to-Center

Thread Size

Pipe Size

Inside Width

Finish

Leg Diameter

Thread Length

Material

Mount Type

Weight Capacity

1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

3,000 lb. to 3,999 lb.

4,000 lb. or greater

Nut Type

Hex

Nut Material

Steel

Number of Nuts Included

Includes Mounting Plate

Yes

Mounting Plate Material

Steel

Mounting Plate Finish

Black Oxide

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

DFARS Specialty Metals

Exempt

RoHS

Compliant

For Rigid Conduit Trade Size

Width

142 Products

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	00000


		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

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

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-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	00000


	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