ASME Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Stainless Steel

Fastener Head Type

Drive Style

Drilled Spanner

External Square

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

Finish

Black Zinc Plated

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Molybdenum Disulfide Coated

Phosphate Coated

Zinc Flake Coated

Threading

Partially Threaded

Head Diameter

Thread Type

Thread Spacing

Rounded Head Style

Head Height

Specifications Met

ANSI/ASSP Z359.12

ANSI/HPVA HP-1 Type I

AREMA MRE Chapter 5, Part 2

ASME B18.2.3.1M

ASME B18.2.3.9M

ASME B18.8.200M

Cal/OSHA Compliant Title 8 Section 1646

CSA C22.2 No. 18.5

CVSA Out-of-Service Criteria

D.O.T. Standard

Federal Specification

NEBS GR-63-CORE

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Thread Direction

Drive Size

Screw Size

Socket Head Profile

Flat Head Profile

Tip Type

Thread Fit

Metric Class 4g6g

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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30,178 Products

Fastening and Joining

Rounded Head Screws

Rounded Head Screws

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

Hex Head Screws

Hex Head Screws

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

Flat Head Screws

Flat Head Screws

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

Socket Head Screws

Socket Head Screws

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

Set Screws

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

Carriage Bolts

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

Shoulder Screws

Shoulder Screws

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

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

Oval Head Screws

Oval Head Screws

The domed top sits slightly above the surface of countersunk holes for a decorative look

Plow Bolts

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Hex Nuts

Handle most general fastening needs

Coupling Nuts

Connect and extend threaded rods

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

Lock Washers

Resist vibration to prevent fasteners from loosening

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

Spring Pins

Squeeze and insert into tight holes to hold parts in place with tension

Cotter Pins

Secure the ends of clevis pins and shafts to keep components in place

Taper Pins

Fit snugly into tapered holes to secure, position, and align components

Retaining Rings

Retaining Rings

Hold components on a shaft

Weld Nuts

Weld to metal surfaces to add permanent threads

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

Tape

Bind, seal, and mark surfaces

Material Handling

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

Hooks

Lift, hang, and bind loads with rope and chain

Chain Rings

Join chains and add connectors for binding, towing, and lifting

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

Fluid Handling

Pipe and Pipe Fittings

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

Tube and Tube Fittings

Tube and Tube Fittings

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

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