3/8"-16 Shafts | McMaster-Carr

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System of Measurement

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Diameter

Thread Size

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Retaining Ring Groove

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Threaded on Both Ends

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Shaft Type

Round with Support Rail

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Hot-Dipped Galvanized

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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667 Products

Power Transmission

Rotary Shafts

Pair with gears, sprockets, and bearings to transmit rotary motion

17 products

Linear Shafts

Pair with linear bearings and shaft supports to create smooth, precise motion

47 products

Idler Shafts

Support idler sprockets and pulleys in tensioning applications

2 products

Linear Shaft Supports

Support linear shafts to prevent bending and rolling under loads

8 products

Gear Box Shafts

Convert output drives from female to male

4 products

Connecting Rods

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

20 products

Shaft Couplings

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

3 products

Shaft Collars

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

6 products

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

23 products

Fastening and Joining

Standoffs

Separate, position, or connect components in assemblies

52 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

11 products

Thread Adapters

Join threads of a different type, size, and gender

13 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

390 products

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

9 products

Threaded Rod Collars

Hold and position parts on a threaded rod

4 products

Building and Machinery Hardware

Lever Handles

Replace gear levers or attach to cranks and hand wheels to make them easier to turn

4 products

Ball-Lever Shafts

Attach a ball knob to create a custom handle for operating machinery

6 products

Fabricating and Machining

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

47 products

Fluid Handling

Float Rods

Connect valve bodies and floats to build or repair a float valve

2 products