ASME Fasteners | McMaster-Carr

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Product Family

Flat Head Screws

Hex Head Screws

Oval Head Screws

Pipe Marker Tape

Repair and Duct Tape

Retaining Rings

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

Threading

Partially Threaded

Finish

Black Zinc Plated

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Molybdenum Disulfide Coated

Phosphate Coated

Head Diameter

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

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 B18.2.3.4M

ASME B18.2.3.9M

ASME B18.8.200M

Cal/OSHA Compliant Title 8 Section 1646

CSA C22.2 No. 18.5

D.O.T. Standard

NEBS GR-63-CORE

Thread Type

Thread Spacing

Rounded Head Style

Thread Direction

Tip Type

Socket Head Profile

Drive Size

Screw Size

Tensile Strength

25 lbf/in. wd. to 49.9 lbf/in. wd.

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

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

Export Control Classification Number (ECCN)

How can we improve?

30,946 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

Socket Head Screws

Socket Head Screws

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

Flat Head Screws

Flat Head Screws

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

Tapping Screws

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

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

Carriage Bolts

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

Oval Head Screws

Oval Head Screws

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

Square Head Screws

Square Head Screws

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Plow Bolts

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

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

Repair and Duct Tape

Repair and Duct Tape

Permanently join or seal 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

Communication

Pipe Marker Tape

Pipe Marker Tape

Secure peeling edges of adhesive pipe markers

Fluid Handling

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

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