Use U-bolts when other bolts, such as lag bolts, carriage bolts and stud bolts, are not suitable for an application.

U-bolts come in different types of material such as stainless steel, bronze, titanium and other metal alloys. There are three types of U-bolts available in the market: round, semi-round and square bend U-bolts. The round bolt has a semicircular curvature and an exact ‘U’ shape, semi-round has less curvature radius at the bent part and the square bend U-bolt has the least curvature radius and has almost a rectangular shape. You can choose one based on your application requirements.

Some of the important parameters you must consider before purchasing U-bolts are:

1. Load carrying capacity of U-bolts
2. Internal curvature radius of U-bolts
3. Material of U bolts

Action Steps
The best contacts and resources to help you get it done

Understand U-bolt dimensions

U-bolts available in the market are of various sizes and shapes. As the dimensions of a U-bolt determine its overall performance, you need to know these dimensions to make an appropriate selection.

I recommend: Clamps is a U-bolt manufacturer that provides information on U-bolt dimensions. Walker Spring & Brake Service explains the dimensions of leaf spring u-bolts.

Buy U-bolts from a U-bolt manufacturer

Once you know the type of U-bolt that you need to buy, go to a reliable bolt manufacturer that has a wide range of products.

I recommend: Suncor Stainless offers various types of stainless steel U-bolts such as trailer U-bolts, Bow/stern eye U-bolts and square U-bolts. You can buy forged U-bolts suitable for barges and ship applications from Lawndale Forge. Stengel Bros. Inc. mainly provides leaf spring U-bolts.

Buy standard size U-bolts from online retailers

You can use online retailers' services to purchase standard size U-bolts, sometimes at attractive prices.

I recommend: Bolt Depot is an online retailer from whom you can buy U-bolts at attractive prices. Additionally, you can order industrial U-bolts from many reputable manufacturers using IQS Directory.

Contact a reputable custom U-bolt manufacturer

In case your requirements are not met by standard products available in the market, you can contact companies that customize U-bolts as per your requirements.

I recommend: You can get customized U-bolts within a few hours at U-Bolt-It. Associated Fastening Products, Inc. is another U-bolt manufacturer that offers customized products.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Consult an expert if your U-bolts are rupturing or wearing off frequently.
• •  Check shipping costs and shipping time when you order U-bolts from a supplier.
• •  Keep an inventory of U-bolts in case you need them very often.