Specialty Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Fastener Head Type

Material

Stainless Steel

Threading

Partially Threaded

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Drive Style

External 12-Point

External Square

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Head Height

Head Diameter

Countersink Angle

Flat Head Profile

Neck Type

Thread Type

Head Width

Thread Spacing

Specifications Met

Federal Specification

Thread Pitch

Rounded Head Style

Tensile Strength

Less than 70,000 psi

70,000 psi to 99,999 psi

100,000 psi to 109,999 psi

110,000 psi to 129,999 psi

130,000 psi or greater

Thread Direction

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

REACH

How can we improve?

4,053 Products

Fastening and Joining

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

Flat Head Screws

Flat Head Screws

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

Hex Head Screws

Hex Head Screws

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

Square Head Screws

Square Head Screws

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

Elevator Bolts

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

Plow Bolts

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

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Shoulder Screws

Shoulder Screws

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Tapping Screws

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

Studs

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

Hold-Down Bolts

Hold-Down Bolts

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

T-Bolts

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

Binding Barrels and Screws

Binding Barrels and Screws

Thread together for a low-profile fastener

Binding Barrels

Binding Barrels

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

Binding Barrel Screws

Binding Barrel Screws

Pair with a barrel to create a custom low-profile fastener

Anchors

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

Fabricating and Machining

T-Slot Bolts

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

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.)