1/4"-28 Bolts | McMaster-Carr

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System of Measurement

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Threading

Threaded on Both Ends

Material

Fastener Head Type

Finish

Corrosion-Resistant Coated

Zinc Yellow-Chromate Plated

Drive Style

Spring Plunger Driver

Tamper-Resistant Hex

Tamper-Resistant Torx

Torx Plus

Thread Spacing

Fine

Fastener Strength Grade/Class

Tensile Strength

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

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Grip Length

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Head Height

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Unified Standard Class 1A

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Socket Head Profile

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Right Hand and Left Hand

Head Diameter

Drive Size

DFARS Specialty Metals

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

Yes

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Export Control Classification Number (ECCN)

1,486 Products

Fastening and Joining

Hex Head Screws

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

179 products

Socket Head Screws

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

168 products

Flat Head Screws

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

107 products

Rounded Head Screws

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

172 products

12-Point Screws

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

19 products

Shoulder Screws

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

144 products

Thumb Screws

Tighten and loosen by hand without the need for tools

36 products

Set Screws

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

161 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

14 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

4 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

5 products

Threaded Rods

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

123 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

129 products

Weld Nuts

Weld to metal surfaces to add permanent threads

12 products

Rivet Nuts

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

7 products

Binding Barrel Posts

Pair with a cap or screw to create a custom low-profile fastener

5 products

Spring Plungers

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

25 products

Power Transmission

Connecting Rods

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

63 products

Rod Ends

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

76 products

Lead Screw Collars

Position components and limit travel along a lead screw

17 products

Fabricating and Machining

Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

2 products

Material Handling

Eyebolts

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

4 products