3/8"-24 Bolts | McMaster-Carr

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Threaded on Both Ends

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Finish

Zinc Yellow-Chromate Plated

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Metric Rounded Trapezoidal

UN/UNF (JIC)

UN/UNF (SAE Straight)

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Right Hand and Left Hand

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Spring Plunger Driver

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Less than 10,000 psi

30,000 psi to 99,999 psi

100,000 psi or greater

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Unified Standard Class 2A

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Unified Standard Class 3A

Specifications Met

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DFARS Specialty Metals

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Compliant with Exemptions

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

Yes

Export Control Classification Number (ECCN)

EAR99

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1,134 Products

Fastening and Joining

Hex Head Screws

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

208 products

Socket Head Screws

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

95 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

Flat Head Screws

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

43 products

Rounded Head Screws

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

35 products

Shoulder Screws

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

110 products

Set Screws

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

117 products

T-Bolts

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

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Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

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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

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Thread Adapters

Join threads of a different type, size, and gender

131 products

Weld Nuts

Weld to metal surfaces to add permanent threads

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Rivet Nuts

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

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Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

5 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

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Power Transmission

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

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Precision Lead Screw Nuts

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

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Lead Screw Collars

Position components and limit travel along a lead screw

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Fabricating and Machining

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

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Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

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Fluid Handling

Tube and Tube Fittings

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

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Material Handling

Eyebolts

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

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Jacks

Lift, hold, push, and position heavy objects

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