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Selecting U-Bolts Using Pipe, Conduit, or Tubing Trade Size
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U-Bolts
Stronger than routing clamps and hangers, U-bolts support heavy pipe, tube, and conduit from ceilings, walls, and poles. Zinc-plated steel U-bolts have good corrosion resistance in most environments. Galvanized steel U-bolts have better corrosion resistance than black-oxide and zinc-plated steel U-bolts. 304 stainless steel U-bolts have excellent corrosion resistance and good chemical resistance. 316 stainless steel U-bolts have excellent corrosion and chemical resistance.
U-bolts with four nuts allow you to secure the U-bolt from the top and the bottom.
For technical drawings and 3-D models, click on a part number.
U-Bolts | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID | Mounting Plates | ||||||||||||
| Inch | Metric, mm | For Pipe Size  | Ht. | Thread Lg. | Capacity, lbs. | Ctr.-to-Ctr. | No. of Nuts Included | Pkg. Qty. | Pkg. | Pkg. Qty. | Pkg. | ||
Steel | |||||||||||||
1/4"-20 Thread Size | |||||||||||||
| 7/8" | 22 | 1/2 | 2 15/16" | 2 1/2" | 425 | 1 1/8" | 4 | 5 | 00000000 | 00000 | 5 | 00000000 | 00000 |
| 1 1/8" | 29 | 3/4 | 3 3/16" | 2 1/2" | 425 | 1 3/8" | 4 | 5 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 1/2" | 425 | 1 5/8" | 4 | 5 | 00000000 | 0000 | 5 | 00000000 | 0000 |
5/16"-18 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 2 7/16" | 1 1/2" | 600 | 1 1/4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 1/8" | 29 | 3/4 | 2 3/4" | 1 1/2" | 600 | 1 7/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 7/16" | 37 | 1 | 3 1/16" | 1 1/2" | 600 | 1 3/4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 3/4" | 44 | 1 1/4 | 3 3/16" | 1 1/2" | 600 | 2 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 2" | 51 | 1 1/2 | 3 1/2" | 1 1/2" | 600 | 2 5/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
3/8"-16 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 3" | 2 3/8" | 1,075 | 1 5/16" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 1 1/8" | 29 | 3/4 | 3 5/16" | 2 3/8" | 1,075 | 1 1/2" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 3/8" | 1,075 | 1 3/4" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 1 11/16" | 43 | 1 1/4 | 3 3/4" | 2 3/8" | 1,075 | 2 1/16" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 2" | 51 | 1 1/2 | 4" | 2 1/2" | 1,075 | 2 3/8" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 2 7/16" | 62 | 2 | 4 7/16" | 2 1/2" | 1,075 | 2 13/16" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 2 1/2" | 64 | 2 | 4 5/16" | 1 3/4" | 1,075 | 2 7/8" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 3" | 76 | 2 1/2 | 4 13/16" | 1 3/4" | 1,075 | 3 3/8" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 3 5/8" | 92 | 3 | 5 3/8" | 1 3/4" | 1,075 | 4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 1/8" | 105 | 3 1/2 | 5 13/16" | 1 3/4" | 1,075 | 4 1/2" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 5/8" | 117 | 4 | 6 1/2" | 1 3/4" | 1,075 | 5" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
1/2"-13 Thread Size | |||||||||||||
| 2 15/16" | 75 | 2 1/2 | 5 1/4" | 3" | 2,000 | 3 7/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 3 9/16" | 90 | 3 | 5 3/4" | 3" | 2,000 | 4 1/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 4 1/16" | 103 | 3 1/2 | 6 1/4" | 3" | 2,000 | 4 9/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 4 9/16" | 116 | 4 | 6 3/4" | 3" | 2,000 | 5 1/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 5 5/8" | 143 | 5 | 7 13/16" | 3" | 2,000 | 6 1/8" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
Zinc-Plated Steel | |||||||||||||
1/4"-20 Thread Size | |||||||||||||
| 7/8" | 22 | 1/2 | 2 15/16" | 2 1/2" | 425 | 1 1/8" | 4 | 1 | 00000000 | 0000 | 5 | 0000000 | 0000 |
| 1 1/8" | 29 | 3/4 | 3 3/16" | 2 1/2" | 425 | 1 3/8" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 1/2" | 425 | 1 5/8" | 4 | 1 | 00000000 | 0000 | 5 | 0000000 | 0000 |
5/16"-18 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 2 7/16" | 1 1/2" | 600 | 1 1/4" | 4 | 1 | 0000000 | 0000 | 5 | 0000000 | 0000 |
| 1 1/8" | 29 | 3/4 | 2 3/4" | 1 1/2" | 600 | 1 7/16" | 4 | 1 | 0000000 | 0000 | 5 | 0000000 | 0000 |
| 1 7/16" | 37 | 1 | 3 1/16" | 1 1/2" | 600 | 1 3/4" | 4 | 1 | 0000000 | 0000 | 5 | 0000000 | 0000 |
| 1 3/4" | 44 | 1 1/4 | 3 3/16" | 1 1/2" | 600 | 2 1/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 2" | 51 | 1 1/2 | 3 1/2" | 1 1/2" | 600 | 2 5/16" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
3/8"-16 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 3" | 2 3/8" | 1,075 | 1 5/16" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
| 1 1/8" | 29 | 3/4 | 3 5/16" | 2 3/8" | 1,075 | 1 1/2" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 3/8" | 1,075 | 1 3/4" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
| 1 11/16" | 43 | 1 1/4 | 3 3/4" | 2 3/8" | 1,075 | 2 1/16" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
| 2" | 51 | 1 1/2 | 4" | 2 1/2" | 1,075 | 2 3/8" | 4 | 1 | 00000000 | 0000 | 5 | 00000000 | 0000 |
| 2 7/16" | 62 | 2 | 4 7/16" | 2 1/2" | 1,075 | 2 13/16" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
| 2 1/2" | 64 | 2 | 4 5/16" | 1 3/4" | 1,075 | 2 7/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 3" | 76 | 2 1/2 | 4 13/16" | 1 3/4" | 1,075 | 3 3/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 3 5/8" | 92 | 3 | 5 3/8" | 1 3/4" | 1,075 | 4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 1/8" | 105 | 3 1/2 | 5 13/16" | 1 3/4" | 1,075 | 4 1/2" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 5/8" | 117 | 4 | 6 1/2" | 1 3/4" | 1,075 | 5" | 4 | 1 | 00000000 | 0000 | __ | 000000 | 00 |
1/2"-13 Thread Size | |||||||||||||
| 2 15/16" | 75 | 2 1/2 | 5 1/4" | 3" | 2,000 | 3 7/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 3 9/16" | 90 | 3 | 5 3/4" | 3" | 2,000 | 4 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 1/16" | 103 | 3 1/2 | 6 1/4" | 3" | 2,000 | 4 9/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 9/16" | 116 | 4 | 6 3/4" | 3" | 2,000 | 5 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 5 5/8" | 143 | 5 | 7 13/16" | 3" | 2,000 | 6 1/8" | 4 | 1 | 0000000 | 0000 | 1 | 0000000 | 0000 |
Galvanized Steel | |||||||||||||
1/4"-20 Thread Size | |||||||||||||
| 7/8" | 22 | 1/2 | 2 15/16" | 2 1/2" | 425 | 1 1/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 1 1/8" | 29 | 3/4 | 3 3/16" | 2 1/2" | 425 | 1 3/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 1/2" | 425 | 1 5/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
5/16"-18 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 2 7/16" | 1 1/2" | 600 | 1 1/4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 1/8" | 29 | 3/4 | 2 3/4" | 1 1/2" | 600 | 1 7/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 7/16" | 37 | 1 | 3 1/16" | 1 1/2" | 600 | 1 3/4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 3/4" | 44 | 1 1/4 | 3 3/16" | 1 1/2" | 600 | 2 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 2" | 51 | 1 1/2 | 3 1/2" | 1 1/2" | 600 | 2 5/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
3/8"-16 Thread Size | |||||||||||||
| 15/16" | 24 | 1/2 | 3" | 2 3/8" | 1,075 | 1 5/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 1 1/8" | 29 | 3/4 | 3 5/16" | 2 3/8" | 1,075 | 1 1/2" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 1 3/8" | 35 | 1 | 3 7/16" | 2 3/8" | 1,075 | 1 3/4" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 1 11/16" | 43 | 1 1/4 | 3 3/4" | 2 3/8" | 1,075 | 2 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 2" | 51 | 1 1/2 | 4" | 2 1/2" | 1,075 | 2 3/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 2 7/16" | 62 | 2 | 4 7/16" | 2 1/2" | 1,075 | 2 13/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 2 1/2" | 64 | 2 | 4 5/16" | 1 3/4" | 1,075 | 2 7/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 3" | 76 | 2 1/2 | 4 13/16" | 1 3/4" | 1,075 | 3 3/8" | 4 | 1 | 0000000 | 0000 | 5 | 00000000 | 0000 |
| 3 5/8" | 92 | 3 | 5 3/8" | 1 3/4" | 1,075 | 4" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 1/8" | 105 | 3 1/2 | 5 13/16" | 1 3/4" | 1,075 | 4 1/2" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 5/8" | 117 | 4 | 6 1/2" | 1 3/4" | 1,075 | 5" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
1/2"-13 Thread Size | |||||||||||||
| 2 15/16" | 75 | 2 1/2 | 5 1/4" | 3" | 2,000 | 3 7/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 3 9/16" | 90 | 3 | 5 3/4" | 3" | 2,000 | 4 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 1/16" | 103 | 3 1/2 | 6 1/4" | 3" | 2,000 | 4 9/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 4 9/16" | 116 | 4 | 6 3/4" | 3" | 2,000 | 5 1/16" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
| 5 5/8" | 143 | 5 | 7 13/16" | 3" | 2,000 | 6 1/8" | 4 | 1 | 0000000 | 0000 | __ | 000000 | 00 |
304 Stainless Steel | |||||||||||||