3/8"-24 Fasteners | McMaster-Carr

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Threaded on Both Ends

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Cadmium Yellow-Chromate Plated

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Coarse

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Fastener Strength Grade/Class

Thread Type

Metric Rounded Trapezoidal

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Thread Direction

Right Hand and Left Hand

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Tensile Strength

30,000 psi to 99,999 psi

100,000 psi or greater

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Metric Class 6g

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Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Specifications Met

Nut Type

Socket Head Profile

DFARS Specialty Metals

Tip Type

REACH

Thread Length

RoHS

Compliant with Exemptions

Not Compliant

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

Head Height

Export Control Classification Number (ECCN)

Performance

1,645 Products

Fastening and Joining

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

210 products

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

95 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

35 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

43 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

117 products

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

16 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

110 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

4 products

T-Bolts

Turn by hand for easy fastening, use as a handle, or attach as a point for straps and clamps

2 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

24 products

Hex Nuts

Handle most general fastening needs

60 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

44 products

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

12 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

3 products

Coupling Nuts

Connect and extend threaded rods

19 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

2 products

Square Nuts

Flat sides won’t spin in channels and square holes

1 product

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

7 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

2 products

Threaded Inserts

Create new threads or repair stripped threads

97 products

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

1 product

Weld Nuts

Weld to metal surfaces to add permanent threads

29 products

Rivet-Mount Nuts

Add threads in hard-to-reach areas and materials that are too thin to be tapped

2 products

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

9 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

3 products

Threaded Rods

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

131 products

Single-End Studs

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

13 products

Thread Adapters

Join threads of a different type, size, and gender

193 products

Taper Pins

Fit snugly into tapered holes to secure, position, and align components

22 products

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

Install and remove blind, solid, hollow, and other types of rivets

21 products

Power Transmission

Lead Screw Collars

Position components and limit travel along a lead screw

2 products

Precision Lead Screw Nuts

Pair with precision lead screws for accurate starts and stops in your assembly

5 products

Connecting Rods

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

75 products

Rod Ends

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

11 products

Material Handling

L-Track Mounting Studs

Mount threaded accessories onto L-Tracks

3 products

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

1 product

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

18 products

Building and Machinery Hardware

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

1 product

Knobs

Position, tighten, and secure fixtures and equipment

3 products

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

3 products

Fluid Handling

Hose Crimpers

Crimp ferrules onto hose to secure fittings

1 product

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

3 products

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

6 products

Fabricating and Machining

Toggle Clamps

Lock workpieces onto worktables or objects

8 products

Lathe Tool Insert Holder Set Screws

Replace the set screws on your lathe tool insert holder

1 product

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

28 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

6 products