5/16"-18 Couplings | McMaster-Carr

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UN/UNF (SAE Straight)

544 Products

Fastening and Joining

Coupling Nuts

Connect and extend threaded rods

27 products

Thread Adapters

Join threads of a different type, size, and gender

363 products

Standoffs

Separate, position, or connect components in assemblies

2 products

Threaded Rod Collars

Hold and position parts on a threaded rod

2 products

Power Transmission

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

12 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

2 products

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

21 products

Rod Alignment Couplers

Reduce wear on bearings and seals by flexing when the cylinder and load aren't precisely even

1 product

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

18 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

46 products

Building and Machinery Hardware

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

33 products

Fluid Handling

Float Valve Bodies

Pair with floats and rods to create float valves that meet your needs

1 product

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

5 products

Electrical Power, Networking, and Controlling

Power Receptacles

Install in a wall or panel to transmit power to plugs or sockets

2 products