Specialty Bolts | McMaster-Carr

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Stainless Steel

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Corrosion-Resistant Coated

Hot-Dipped Galvanized

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Zinc Yellow-Chromate Plated

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Partially Threaded

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External 12-Point

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ASTM Grade A325

ASTM Grade A490

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Federal Specification

Tensile Strength

Less than 100,000 psi

100,000 psi to 119,999 psi

120,000 psi to 139,999 psi

140,000 psi to 159,999 psi

160,000 psi or greater

Rounded Head Style

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DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

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4,430 Products

Flat Head Screws

Steel Hex-Drive Flat Head Screws

Steel Hex-Drive Flat Head Screws

Our strongest hex-drive flat head screws

Stainless Steel Hex-Drive Flat Head Screws

Stainless Steel Hex-Drive Flat Head Screws

The most corrosion-resistant hex-drive flat head screws we offer

Stainless Steel Phillips Flat Head Screws

Stainless Steel Phillips Flat Head Screws

Align easily with drivers and resist corrosion

Steel Torx Plus Flat Head Screws

Steel Torx Plus Flat Head Screws

The strongest Torx Plus flat head screws we offer

Stainless Steel Torx Plus Flat Head Screws

Stainless Steel Torx Plus Flat Head Screws

The most corrosion-resistant Torx Plus flat head screws we offer

Steel Torx Flat Head Screws

Steel Torx Flat Head Screws

The deep six-lobe opening prevents your driver from slipping

Stainless Steel Torx Flat Head Screws

Stainless Steel Torx Flat Head Screws

The most corrosion-resistant Torx flat head screws we offer

Sealing Stainless Steel Phillips Flat Head Screws

Sealing Stainless Steel Phillips Flat Head Screws

Keep out dust and contaminants while locking in air and fluid

Stainless Steel Slotted Flat Head Screws

Stainless Steel Slotted Flat Head Screws

The most corrosion-resistant slotted flat head screws we offer

Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Turn to the left to tighten and prevent loosening from counterclockwise motion

Other Products

Binding Barrels

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

Set Screws

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

Shoulder Screws

Shoulder Screws

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

Studs

Press, weld, or screw in place to add a threaded fastening point

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

Tapping Screws

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

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Hex Head Screws

Hex Head Screws

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

12-Point Screws

12-Point Screws

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

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

Wood Screws

Fasten material to wood or pieces of wood to each other

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Hold-Down Bolts

Hold-Down Bolts

Hold material under the bent head while the other end is tightened down with a nut

T-Bolts

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

T-Slot Cleaners

T-Slot Cleaners

Scrape debris out of machine table T-slots

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)