Steel Fasteners | McMaster-Carr

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System of Measurement

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Length

Finish

Black Zinc Plated

Cadmium Yellow-Chromate Plated

Chromate Conversion Coated

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Partially Threaded

Threaded on Both Ends

Threaded on One End

Drive Style

External 12-Point

External Square

Hex with Pilot Recess

Tamper-Resistant Hex

Tamper-Resistant Torx

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Thread Pitch

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Thread Direction

Right Hand and Left Hand

Thread Spacing

Screw Size

Thread Type

Metric Rounded Trapezoidal

Metric Trapezoidal

Socket Head Profile

Head Height

Head Diameter

Specifications Met

ANSI/ASSP Z359.12

AREMA MRE Chapter 5, Part 2

D.O.T. Compliant 49 CFR 393.102

Federal Specification

Drive Size

Tensile Strength

Less than 250 lbf

250 lbf to 499 lbf

500 lbf to 999 lbf

1,000 lbf to 1,999 lbf

2,000 lbf or greater

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Diameter

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

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61,138 Products

Most Likely Products

Socket Head Screws

Socket Head Screws

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

Hex Head Screws

Hex Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

Hex Nuts

Handle most general fastening needs

All Results

Fastening and Joining

Socket Head Screws

Socket Head Screws

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

Hex Head Screws

Hex Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

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

Wood Screws

Fasten material to wood or pieces of wood to each other

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

Carriage Bolts

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Fastener Assortments

Fastener Assortments

Stay prepared by keeping fasteners in common sizes and materials on hand

Tighten and loosen by hand without the need for tools

Studs

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

Elevator Bolts

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

T-Bolts

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

Hold-Down Bolts

Hold-Down Bolts

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

Square Head Screws

Square Head Screws

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

Drywall Screws

Fasten panels of drywall to materials such as wood, metal, and drywall

Plow Bolts

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

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Jack Screws

Secure computer cables and panels

Hex Nuts

Handle most general fastening needs

Flange Nuts

The flange distributes pressure, so you don't need a washer

Locknuts

Hold fasteners in place to prevent loosening from vibration

Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

Coupling Nuts

Connect and extend threaded rods

Lug Nuts

Secure pneumatic wheels to axles

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Push-Button Nuts

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

Easy to tighten and loosen by hand for making frequent adjustments

Square Nuts

Flat sides won’t spin in channels and square holes

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

Slotted Round Nuts

Slotted Round Nuts

Fasten with a screwdriver in tight spots where there's no room for a wrench

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

Screw-Mount Nuts

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Adhesive-Mount Nuts

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

Weld Nuts

Weld to metal surfaces to add permanent threads

Dowel Nuts

Form joints in blind holes in wood

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

Tube-Connecting Nuts

Tube-Connecting Nuts

Push inside tubes to join them with a threaded stud instead of welding

Rivet-Mount Nuts

Rivet-Mount Nuts

Add threads in hard-to-reach areas and materials that are too thin to be tapped

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

Quick-Release Pins

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

Dowel Pins

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

Clevis Pins

Secure parts in place and lock with a cotter pin or retaining ring

Cotter Pins

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

Spring Pins

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

Shear Pins

Use with shear hubs to break at a specific torque and safeguard machinery from overloads

Linch Pins

Slide into holes on clevis pins and shafts and snap down the locking ring so parts won’t fall off

Taper Pins

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

Weld Pins

Weld in place for greater rigidity and strength than other pins

Dowel Pin Stock

Dowel Pin Stock

Cut to the length you need for positioning and holding parts in place

Washers

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

Lock Washers

Resist vibration to prevent fasteners from loosening

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Leveling Washers

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

Finishing Washers

Finishing Washers

Screw heads sit flush to prevent snagging and to create a neat, finished appearance

Binding Barrels and Screws

Binding Barrels and Screws

Thread together for a low-profile fastener

Retaining Rings

Retaining Rings

Hold components on a shaft

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

Anchors

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

Nails

Drive into wood, plastic, drywall, and masonry

Screw Nails

Drive like nails but hold like screws in drilled holes in wood, plastic, drywall, and masonry

Gravity Pins

Slip through holes in telescoping tubing and wrap around to secure

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

Spacers

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

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

Wood Joiners

Connect and repair wood pieces and joints

Hog Rings

Squeeze closed using hog ring pliers to seal sacks, repair fences, and clip on tags

Staples

Use in air-powered, electric, cordless, and manual staplers to secure cardboard and other materials

Shim Stock

Cut into custom shapes to align, space, and level components on dies, presses, and machinery

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Single-End Studs

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

Railroad Spikes

Railroad Spikes

Stake rails and base plates to railroad ties

Unthreaded Inserts

Unthreaded Inserts

Reinforce, align, and adjust joints as you tighten a fastener

Split Rings

Secure clevis pins, connect components, or add a pull handle; also known as key rings

Spring Button Clips

Spring Button Clips

Join pieces of telescoping tubing using spring force

Fabric Snaps

Join soft, heavy fabrics such as leather and canvas

Tacks

Secure upholstery to a frame

Panel Clips

Slide over the edge of two or more panels to hold them together without tools or fasteners

Rivet Tools

Install and remove blind, solid, hollow, and other types of rivets

Rivet Tool Accessories and Replacement Parts

Rivet Tool Accessories and Replacement Parts

Add accessories like nosepieces and jaws or replace seals and other parts on your rivet tool

Push Nut Installation Tools

Push Nut Installation Tools

Press nuts and retaining rings onto threaded fasteners and shafts

Hanger Bolt Driver Bits

Hanger Bolt Driver Bits

Turn flat-end bolts and screws

Anchor Installation Tools

Anchor Installation Tools

Drive with a hammer to expand and secure anchors in place

Staplers

Air-powered, electric, cordless, and manual staplers

Snap-In Nut Tools

Snap-In Nut Tools

Compress the legs of snap-in nuts so they're easy to install and remove

Power Transmission

Bearing Nuts

Hold bearings, bushings, pulleys, and gears in place on threaded shafts and spindles

Bearing Lock Washers

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

Lead Screws and Nuts

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

Shock Absorber Mounting Nuts

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

Rod End Nuts

Attach to rods, pipe, and tubing to make pivot and hinge points

Connecting Rods

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

Ball Screws and Nuts

Ball Screws and Nuts

Internal ball bearings roll on screws for low friction when moving components at high speeds

Lead and Ball Screw End Supports

Lead and Ball Screw End Supports

Brace and secure the ends of lead screws and ball screws

Roller Chain Spring Clips

Roller Chain Spring Clips

Replace the clips that secure ANSI roller chain connecting links

Inverted-Tooth Chain Pins

Inverted-Tooth Chain Pins

Replace the pins in your inverted-tooth chain or link two chains together

Roller Screws and Nuts

Roller Screws and Nuts

More contact points to move heavier loads than ball and lead screw assemblies

Ball Screw/Splines

Ball Screw/Splines

Transmit rotary power, move loads along the shaft, or do both at once

Hydraulic Cylinder Mounts

Hydraulic Cylinder Mounts

Restrain cylinders and secure loads to the end of the rod

Building and Machinery Hardware

T-Slotted Framing Fasteners

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

T-Slotted Framing Structural Brackets

T-Slotted Framing Structural Brackets

Join T-slotted rail surfaces and corners to build virtually any structure

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

Locking-Slotted Framing and Fittings

Locking-Slotted Framing and Fittings

Make platforms, bases, and other structures that stand up to more movement than T-slotted framing

Bolt-Together Framing and Fittings

Bolt-Together Framing and Fittings

Fasten through equally spaced holes to build and adjust guards, tables, and racks

Bar Grating Clips

Bar Grating Clips

Secure grating to your support structure

Knobs

Position, tighten, and secure fixtures and equipment

Machine Handles

Machine Handles

Arms give you extra leverage to secure and position jigs, fixtures, and other equipment

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Brackets

Connect surfaces in an assembly

Window Latches

Hold windows and screens closed for security or open for ventilation

Material Handling

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

Hoist Rings

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

Chain Rings

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

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

Carabiners

Hook onto rope and webbing to quickly connect objects, fittings, and other lengths of rope

Quick Links

Screw the nut closed to join lengths of chain and add connectors

Hooks

Lift, hang, and bind loads with rope and chain

Ring Links

Bend, hammer, or twist closed to connect chain links and attach fittings

Turnbuckles

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

Webbing Buckles

Webbing Buckles

Pair with webbing to make adjustable straps

Webbing Hooks

Add to the end of webbing in order to latch it onto other objects

Webbing Tips

Attach to webbing to prevent frayed ends and make it easier to thread

Webbing Guides

Prevent webbing from twisting and use as anchor points; also known as footman's loops

Webbing Rings

Add looped connection spots

Bungee Cord Hooks

Bungee Cord Hooks

Add to bungee cords to hook them onto rings and loops

E-Tracks

Add straps and other parts to keep cargo from moving inside vans and trucks; stronger than L-Tracks

Tie-Down Washers

Tie-Down Washers

Angled sides align and hold tie-down straps

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

U-Bolt Plates

Reinforce mounted U-bolts for a more secure hold

Loop Clamps

Hold pipe snug against the mounting surface to prevent movement that may cause breakage

Tie Wire Hangers

Tie Wire Hangers

Hang lightweight items such as suspended ceilings and lighting fixtures

Routing Rings

Suspend wire and cable by feeding it through the eyehole

Routing Ring Bases

Routing Ring Bases

Temporarily attach routing rings to steel and iron surfaces with a magnet

Cable Tie Mounts

Cable Tie Mounts

Attach to walls, machines, and other surfaces and add a cable tie to organize and secure bundles

Cable Holders

Mount to a surface to secure and route cable

Twist Ties

Wind the ends to bundle cable and wire or close bags and sacks

Baling Wire

Secure large bundles such as lumber, cardboard, and wire coils

Conveyor Belt Lacing

Conveyor Belt Lacing

Join conveyor belt ends with a strong, reliable connection; easier to install than endless belts

Conveyor Belt Lacing Pins

Conveyor Belt Lacing Pins

Insert and lock in place to connect belt lacing ends

Fabricating and Machining

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

T-Slot Bolts

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

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

T-Slot Cleaners

T-Slot Cleaners

Scrape debris out of machine table T-slots

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

Fixturing Clamps

Fixturing Clamps

Secure your workpiece to a fixture table so it won't move during machining

Fixturing Kits

Everything needed to mount workpieces of different sizes to your machine table

Clamps

Hold workpieces securely in place

Clamp Holding Washers

Clamp Holding Washers

Replace worn washers on open-arm toggle clamps to keep holding screws in place

Window Poles

Open and close windows

Core Pins

Add to molds and pour in plastic to form holes in finished parts

Ejector Pins

Push finished parts out of molds

Ejector Blades

Flat end pushes thin-walled parts out of molds better than ejector pins

Ejector Sleeves

Ejector Sleeves

Use with mold pins to form holes, bosses, and other features in parts

Lathe Tool Insert Holder Replacement Parts

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

Lathe Chuck Jaw Nuts

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck

Punch Pins

Use with press dies to punch 1/8" and larger holes; modify to fit your application

Broach Shims

Slide between a keyway broach and bushing to control the keyway's depth when cutting more than once

Containers, Storage, and Furniture

Workbench Top Fasteners

Workbench Top Fasteners

Secure wood and plastic tops to bases

Heating, Ventilation, and Air Conditioning

Insulation Hanger Studs

Insulation Hanger Studs

Press insulation sheets onto the spike to secure them to walls and other flat surfaces

Electrical

Battery Terminal Fasteners

Battery Terminal Fasteners

Replace bolts in battery terminals

Conduit and Conduit Fittings

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

DIN Rail Mounting Adapters

DIN Rail Mounting Adapters

Attach to components not made for DIN rail and clip on to install

Communication

Tag Washers

Bolt onto surfaces to mount tag rings and ties

Tag Ties

Wrap through tag holes to connect to items such as lanyards and key rings

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

Fluid Handling

Hose Crimpers

Crimp ferrules onto hose to secure fittings

Pipe and Pipe Fittings

Pipe and Pipe Fittings

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

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