Bolts - Grainger Industrial Supply (2024)

U-Bolts

Available358 products

U-bolts support heavy objects from ceilings, walls, and poles. They are stronger than routing clamps and hangers and are corrosion resistant if made of galvanized steel or coated with zinc. Other types of U-bolts are made of aluminum for light-duty lifting, while different grades of stainless-steel U-bolts are also resistant to chemicals. U-bolts are fastened with nuts for a tight connection.

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Standard U-Bolts

Bolts - Grainger Industrial Supply (7)

Standard U-bolts (or round U-bolts) attach pipes or round steel bars to wood or steel posts. They may also hang pipe from walls or ceilings or may be embedded in concrete as anchor bolts. They are stronger than routing clamps and hangers. U-bolts are fastened with nuts for a tight connection. Black oxide-coated U-bolts are corrosion resistant in dry environments. Zinc-plated U-bolts are corrosion resistant in wet environments. Hot dipped galvanized steel U-bolts are corrosion resistant, stringer than regular steel and are resistant to abrasion. These U-bolts are also available in lightweight aluminum or naturally corrosion-resistant 304 or 316 stainless steel.

Plain SS304

5/16"-18

Standard U-Bolts Plain SS304 5/16"-18, sorted by Inside Width/Diameter, custom

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Plain Steel

1/4"-20

Standard U-Bolts Plain Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Plain Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Plain Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Standard U-Bolts Plain Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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3/4"-10

Standard U-Bolts Plain Steel 3/4"-10, sorted by Inside Width/Diameter, custom

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7/8"-9

Standard U-Bolts Plain Steel 7/8"-9, sorted by Inside Width/Diameter, custom

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Black Oxide Steel

1/4"-20

Standard U-Bolts Black Oxide Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts Black Oxide Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Black Oxide Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Black Oxide Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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Zinc Plated Steel

1/4"-20

Standard U-Bolts Zinc Plated Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts Zinc Plated Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Zinc Plated Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Zinc Plated Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Standard U-Bolts Zinc Plated Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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3/4"-10

Standard U-Bolts Zinc Plated Steel 3/4"-10, sorted by Inside Width/Diameter, custom

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7/8"-9

Standard U-Bolts Zinc Plated Steel 7/8"-9, sorted by Inside Width/Diameter, custom

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Hot Dipped Galvanized Steel

1/4"-20

Standard U-Bolts Hot Dipped Galvanized Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts Hot Dipped Galvanized Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Hot Dipped Galvanized Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Hot Dipped Galvanized Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Standard U-Bolts Hot Dipped Galvanized Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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3/4"-10

Standard U-Bolts Hot Dipped Galvanized Steel 3/4"-10, sorted by Inside Width/Diameter, custom

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7/8"-9

Standard U-Bolts Hot Dipped Galvanized Steel 7/8"-9, sorted by Inside Width/Diameter, custom

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Plain 304 Stainless Steel

1/4"-20

Standard U-Bolts Plain 304 Stainless Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts Plain 304 Stainless Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Plain 304 Stainless Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Plain 304 Stainless Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Standard U-Bolts Plain 304 Stainless Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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3/4"-10

Standard U-Bolts Plain 304 Stainless Steel 3/4"-10, sorted by Inside Width/Diameter, custom

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7/8"-9

Standard U-Bolts Plain 304 Stainless Steel 7/8"-9, sorted by Inside Width/Diameter, custom

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Plain 316 Stainless Steel

1/4"-20

Standard U-Bolts Plain 316 Stainless Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Plain 316 Stainless Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Plain 316 Stainless Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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Plain Aluminum

1/4"-20

Standard U-Bolts Plain Aluminum 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts Plain Aluminum 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts Plain Aluminum 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts Plain Aluminum 1/2"-13, sorted by Inside Width/Diameter, custom

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Standard U-Bolts with Mounting Plates

Bolts - Grainger Industrial Supply (8)

Steel U-bolt mounting plates attach to U-bolts to fasten objects to ceilings or walls. The mounting plates allow the U-bolts to hold heavier objects than just a nut provides. Mounting plates come in a black oxide finish, which is corrosion resistant in dry environments, a zinc-plated finish, which is corrosion resistant in wet environments, or can be hot dipped galvanized for extra protection in wet environments. The U-bolts are also available in 304 stainless steel.

Plain 304 Stainless Steel

1/4"-20

Standard U-Bolts with Mounting Plates Plain 304 Stainless Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/16"-18

Standard U-Bolts with Mounting Plates Plain 304 Stainless Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Standard U-Bolts with Mounting Plates Plain 304 Stainless Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Standard U-Bolts with Mounting Plates Plain 304 Stainless Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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Square U-Bolts

Bolts - Grainger Industrial Supply (9)

Square U-bolts suspend flat-bottomed objects from ceilings and walls. U-bolts are fastened with nuts for a tight connection. They are stronger than routing clamps and hangers and are corrosion resistant if made of galvanized steel or coated with zinc. Zinc-plated U-bolts are corrosion-resistant in wet environments. These U-bolts may also be hot dipped galvanized for extra corrosion resistance. Other types of U-bolts are made of aluminum for light-duty lifting, while 304 stainless steel U-bolts are also resistant to chemicals.

Zinc Plated Steel

5/16"-18

Square U-Bolts Zinc Plated Steel 5/16"-18, sorted by Inside Width/Diameter, custom

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3/8"-16

Square U-Bolts Zinc Plated Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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Hot Dipped Galvanized Steel

3/8"-16

Square U-Bolts Hot Dipped Galvanized Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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Plain 304 Stainless Steel

3/8"-16

Square U-Bolts Plain 304 Stainless Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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Cushioned U-Bolts

Bolts - Grainger Industrial Supply (10)

Cushioned U-bolts absorb friction, reduce vibration, and support heavy loads hanging from ceilings, mounted on walls, and attached to pipes. They fasten with nuts for a tight connection.

Steel

1/4"-20

Cushioned U-Bolts Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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5/8"-11

Cushioned U-Bolts Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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3/8"-16

Cushioned U-Bolts Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Cushioned U-Bolts Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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Vibration Dampening U-Bolts

Bolts - Grainger Industrial Supply (11)

Vibration-dampening U-bolts, also known as vibration-damping U-bolts, are wrapped in a plastic cushion to minimize movement and noise. These U-bolts have nylon-threaded nuts that resist loosening when used in equipment that vibrates. These U-bolts are used in heavy-duty construction where metal-to-metal fastening is required. A zinc-plated finish on these bolts makes them corrosion-resistant in wet environments, and they are available in 316 stainless steel.

Zinc Plated Steel

1/4"-20

Vibration Dampening U-Bolts Zinc Plated Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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3/8"-16

Vibration Dampening U-Bolts Zinc Plated Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Vibration Dampening U-Bolts Zinc Plated Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Vibration Dampening U-Bolts Zinc Plated Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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Plain 316 Stainless Steel

5/8"- 11

Vibration Dampening U-Bolts Plain 316 Stainless Steel 5/8"- 11, sorted by Inside Width/Diameter, custom

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1/4"-20

Vibration Dampening U-Bolts Plain 316 Stainless Steel 1/4"-20, sorted by Inside Width/Diameter, custom

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3/8"-16

Vibration Dampening U-Bolts Plain 316 Stainless Steel 3/8"-16, sorted by Inside Width/Diameter, custom

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1/2"-13

Vibration Dampening U-Bolts Plain 316 Stainless Steel 1/2"-13, sorted by Inside Width/Diameter, custom

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5/8"-11

Vibration Dampening U-Bolts Plain 316 Stainless Steel 5/8"-11, sorted by Inside Width/Diameter, custom

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U-Bolt Mounting Plates

Bolts - Grainger Industrial Supply (12)

U-bolt mounting plates attach to U-bolts to fasten objects to ceilings or walls. The mounting plates allow the U-bolts to hold heavier objects than just a nut provides. These plates can be made corrosion resistant in wet environments by coating them in zinc or silicone.

Zinc Plated Steel

For Use with U-Bolt Thread Size: 5/16”-18

U-Bolt Mounting Plates Zinc Plated Steel For Use with U-Bolt Thread Size: 5/16”-18, sorted by Mounting Plate Length, ascending

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For Use with U-Bolt Thread Size: 1/4"-20

U-Bolt Mounting Plates Zinc Plated Steel For Use with U-Bolt Thread Size: 1/4"-20, sorted by Mounting Plate Length, ascending

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For Use with U-Bolt Thread Size: 5/16"-18

U-Bolt Mounting Plates Zinc Plated Steel For Use with U-Bolt Thread Size: 5/16"-18, sorted by Mounting Plate Length, ascending

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For Use with U-Bolt Thread Size: 1/2"-13

U-Bolt Mounting Plates Zinc Plated Steel For Use with U-Bolt Thread Size: 1/2"-13, sorted by Mounting Plate Length, ascending

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Plain 304 Stainless Steel

For Use with U-Bolt Thread Size: 1/4"-20

U-Bolt Mounting Plates Plain 304 Stainless Steel For Use with U-Bolt Thread Size: 1/4"-20, sorted by Mounting Plate Length, ascending

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For Use with U-Bolt Thread Size: 5/16"-18

U-Bolt Mounting Plates Plain 304 Stainless Steel For Use with U-Bolt Thread Size: 5/16"-18, sorted by Mounting Plate Length, ascending

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For Use with U-Bolt Thread Size: 1/2"-13

U-Bolt Mounting Plates Plain 304 Stainless Steel For Use with U-Bolt Thread Size: 1/2"-13, sorted by Mounting Plate Length, ascending

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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order.
Bolts - Grainger Industrial Supply (2024)

FAQs

What is the shoulder of a screw? ›

Shoulder screws have three main sections: head, shoulder, and thread. The head has the largest diameter, the shoulder is described by its diameter and length, and the thread has a major diameter slightly smaller than the shoulder diameter.

What is the difference between rod ends and eye bolts? ›

Lift eye bolts are rated for vertical lifting up to their specified capacity. Rod ends are threaded swing bolts that can be cut to any length required. They connect and support loads and allow motion control and hinge movements.

What classifies a bolt? ›

A bolt is an externally helical threaded fastener that fastens objects with unthreaded holes together. This is done by applying a twisting force (torque) to a matching nut. The bolt has an external male thread requiring a matching nut with a pre-formed female thread.

What fasteners? ›

Fasteners are hardware devices that join objects together. This includes bolts, screws, nails and more. Knowing the correct types of fasteners will make your projects run more smoothly and be more secure.

What is the difference between shoulder bolts and regular bolts? ›

Regular screws have a threading that is present across the entire body, but custom shoulder bolts' threads disappear before the head, leaving a smooth, round, shape between the head and the threading.

How to size a shoulder bolt? ›

Size is the shoulder diameter and length is the length of the shoulder—measure length from under the head to the end of the shoulder. An additional dimension is thread size, which is always smaller in diameter than the shoulder, and ranges from 10-24 to 5/8-11 for the common sizes.

What are bolts without heads called? ›

Stud bolts have a fully threaded or partially threaded stud or bar without a head. They have nuts at either end of the stud to tightly secure a connection. Partially threaded stud bolts have an unthreaded portion in the middle of the stud with threads of varying lengths at each end.

What does 10.9 mean on a bolt? ›

Property Class 10.9 bolts and screws have a minimum tensile strength of 1040 MPa for all sizes. As you can see, they're slightly stronger than the nominal value in the property class designation. Property Class 10.9 bolts are considered high-strength parts. They're in the neighborhood of SAE J429 Grade 8 parts.

What does 8.8 mean on a bolt? ›

Grade 8.8 high tensile steel is often referred to as the structural grade for bolts. It is the most common form of high tensile material and is usually stocked in plain finish or zinc.

What screws don t need a nut? ›

Lag Bolts: Also known as lag screws, not used with a nut. Extremely sturdy, good for bearing heavy loads.

What are the lines on a screw called? ›

That's the thread, the spirals that wrap around the internal or external diametrical surface. External threads are called male while internal threads, such as what we see with nuts, are female.

What is the screw that goes into another screw? ›

Barrel nuts, often called sex bolts or inter screws, are mating fasteners. The nut has a threaded hole with a drilled-out and threaded centre, into which the barrel bolt fits. We stock and supply a wide range of barrel nuts and sex bolts, including architectural and security fixings.

What is the opposite of a shoulder screw? ›

A shoulder screw has a head and a shank with a portion that is unthreaded. The technically correct answer to your question is that the opposite of a shoulder screw (or bolt) is the matching nut.

What is a shoulder in manufacturing? ›

Used most often as a spacer or for surface bearing, shoulder screws are uniquely designed with a long, cylindrical middle section referred to as a shoulder. The shoulder is intended to be wider than the screw section and narrower than the head.

What is the anatomy of a screw? ›

The three basic parts of a screw are the head, threaded shank and point.

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