Specialty Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Stainless Steel

Fastener Head Type

Threading

Partially Threaded

Neck Type

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Fastener Strength Grade/Class

Head Diameter

Thread Type

Head Height

Thread Spacing

Tensile Strength

Less than 60,000 psi

60,000 psi to 69,999 psi

70,000 psi to 99,999 psi

100,000 psi to 119,999 psi

120,000 psi or greater

Head Width

Neck Width

Specifications Met

Thread Fit

Metric Class 4h

Metric Class 6g

Metric Class 6h

Metric Class 8g

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Diameter

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

RoHS

Compliant with Exemptions

Drive Style

External 12-Point

External Pentagon

External Square

Neck Length

Hardness

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1,907 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

Studs

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

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

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

T-Bolts

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

Plow Bolts

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

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Hold-Down Bolts

Hold-Down Bolts

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

Anchors

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

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