Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Beryllium Copper

Stainless Steel

Threading

Partially Threaded

Threaded on Both Ends

Threaded on One End

Fastener Head Type

Finish

Black Zinc Plated

Corrosion-Resistant Coated

Galvanic Barrier Coated

Hot-Dipped Galvanized

Fastener Strength Grade/Class

ASTM Grade B8SH

ASTM Grade B8MSH

ASTM Grade A325

ASTM Grade A490

Thread Pitch

Thread Spacing

Head Width

Head Height

Thread Type

Metric Rounded Trapezoidal

Metric Trapezoidal

UN/UNF (SAE Straight)

Thread Direction

Right Hand and Left Hand

Socket Head Profile

Specifications Met

Cal/OSHA Compliant Title 8 Section 1646

Federal Specification

OSHA Compliant 29 CFR 1926.451

Head Diameter

Tensile Strength

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

Thread Fit

ASME Interference Class 5

Metric Class 4g6g

Metric Class 4h

Metric Class 5g6g

Metric Class 6g

Metric Class 6G

Metric Class 6h

Metric Class 6H

Metric Class 8g

Metric Interference Sk6

Metric Trapezoidal Class 7e

Metric Trapezoidal Class 7H

Metric Trapezoidal Class 8e

Unified Standard Class 1A

Unified Standard Class 1B

Unified Standard Class 2A

Screw Features

Tension Indicating

Drive Size

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

How can we improve?

89,998 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

11,524 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

Rounded Head Screws

Rounded Head Screws

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

10,446 products

Flat Head Screws

Flat Head Screws

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

Tighten and loosen by hand without the need for tools

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

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

Set Screws

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

Square Head Screws

Square Head Screws

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

T-Bolts

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

Elevator Bolts

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

Oval Head Screws

Oval Head Screws

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

Studs

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Fastener Assortments

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

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

Concrete Screws

Concrete Screws

Anchor parts to concrete, block, and brick without tapping the hole first

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Drywall Screws

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

Jack Screws

Secure computer cables and panels

Dowel Screws

Screw into holes to join two pieces of wood

Threaded Rods

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

Binding Barrels

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

Single-End Studs

Single-End Studs

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

Rivet Nuts

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

Weld Nuts

Weld to metal surfaces to add permanent threads

Anchors

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Standoffs

Separate, position, or connect components in assemblies

Standoff Caps

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

Spring Plungers

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

Captive Pins

Press into holes in thin materials like panels and circuit boards to permanently join or align them

Rivets

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

L-Keys

Turn fasteners from either end and reach into tight spots

Screwdriver Bits

Screwdriver Bits

Pair with drivers to turn screws

Screwdrivers

Tighten and loosen screws

Tapping Screw Installation Tools

Tapping Screw Installation Tools

Use with a hammer drill to install tapping screws in concrete, block, and brick

Screw Starters

Grip and start turning screws that are too small to hold or located in hard-to-reach spots

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

Nutdrivers

Tighten and loosen nuts and bolts

Torque Screwdrivers

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

Torque-Limiting Keys

Torque-Limiting Keys

Used to install carbide inserts in cutting tools, a handle limits the amount of torque generated

Screwdriver/Nutdrivers

Screwdriver/Nutdrivers

Quickly switch between driving screws and driving nuts

Hanger Bolt Driver Bits

Hanger Bolt Driver Bits

Turn flat-end bolts and screws

Speeder Handles

Speeder Handles

Crank the handle to fasten nuts and bolts quickly

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

Magnets

Attract or repel metal objects to hang, secure, or position them

Stud Welders

Join studs and pins to metal, leaving no marks on the back of the material

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

Locating Pin Lock Screws

Locating Pin Lock Screws

Secure removable locating pins

Drill Bushing Lock Screws

Drill Bushing Lock Screws

Prevent drill bushings from spinning

T-Tracks

Versatile mounting tracks for jigs, fences, and other custom setups

Fixture Clamps

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

Fixture Kits

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

Gear and Bearing Puller Forcing Screws

Gear and Bearing Puller Forcing Screws

Replace forcing screws on gear and bearing pullers

Gear and Bearing Puller Shaft Protectors

Gear and Bearing Puller Shaft Protectors

Prevent forcing screws on pullers from causing damage

Gear and Bearing Puller Step-Plate Adapters

Gear and Bearing Puller Step-Plate Adapters

Provide a surface for forcing screws on pullers to push against

Clamping Screws

Clamping Screws

Apply pressure through a flat-tipped screw to hold material in place

Clamp Holding Screws

Clamp Holding Screws

Replace worn holding screws in clamps or customize with different sizes or styles

Clamp Holding Screw Tips

Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

Lathe Tools

Shape workpieces as they rotate on a lathe

Lathe Tool Insert Holder Replacement Parts

Lathe Tool Insert Holder Replacement Parts

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

Power Transmission

Rod Ends

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

Rod End Inserts

Rod End Inserts

Attach to rod ends to increase the amount of misalignment they can handle

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

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

Lead Screws and Nuts

Lead Screws and Nuts

Move components in a straight line in clamping and heavy duty lifting and lowering applications

Precision Lead Screws and Nuts

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

Precision Lead Screw Nut Flanges

Precision Lead Screw Nut Flanges

Pair with precision lead screw nuts to make custom flange nuts that move items along lead screws

Lead Screw Collars

Lead Screw Collars

Position components and limit travel along a lead screw

Ball Screws and Nuts

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

Die Spring Screw Caps

Die Spring Screw Caps

Brace springs and control tension in die sets while simplifying maintenance

End Supports for Ball Screws and Precision Lead Screws

End Supports for Ball Screws and Precision Lead Screws

Brace and secure the ends of ball screws and precision lead screws

Ball Screw/Splines and Bearings

Ball Screw/Splines and Bearings

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

Roller Screws and Nuts

Roller Screws and Nuts

Create more points of contact to handle much higher loads than ball screws and nuts of the same size

Sleeve Splines

Pair with sleeve spline bearings to transmit rotary power or move loads along the shaft

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

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

Wheel Axles

Connect rotating wheels and support vehicles

U-Bolts

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

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

Jacks

Lift, hold, push, and position heavy objects

Hitch Clamps

Strengthen the joint between your hitch insert and receiver to prevent rattling and swaying

Conveyor T-Slot Bolts

Conveyor T-Slot Bolts

Drop into the T-slot to mount components

Building and Machinery Hardware

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

Strut Channel Nuts

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

Bolt-Together Framing and Fittings

Bolt-Together Framing and Fittings

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

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

Slip-On Framing and Fittings

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

Cam Handles

For fast clamping, push down on the handle to draw two parts together

Protective Caps

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

Deadbolt Locks

Require a key or combination to unlock from the outside

Drawer and Cabinet Deadbolt Locks

Drawer and Cabinet Deadbolt Locks

Secure wooden drawers and cabinet doors with a key

Door Strike Plates

Door Strike Plates

Reinforce the area where the latch meets the frame to protect it from friction

Flush Bolt Locks

Flush Bolt Locks

Prevent double doors from being opened, or lock one door while the other stays unlocked

Door Tracks

Hang panels to slide over openings when there’s not space for a swinging door

Electrical

Grounding Lugs

Create a common grounding path for internal components and circuits, as well as the enclosure body

Grounding Screws

Grounding Screws

Fasten grounding wires to steel structures, fence posts, and transformers

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Electrical Enclosure Mounting Channels

Electrical Enclosure Mounting Channels

Position components inside electrical enclosures without drilling holes, which can leak

Electrical Enclosure Pole Mounts

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

Battery Terminal Fasteners

Battery Terminal Fasteners

Replace bolts in battery terminals

Binding Posts

Test circuits before making permanent connections

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

Toilet Seat Fasteners

Toilet Seat Fasteners

Secure toilet seat hinges to your toilet bowl

Containers, Storage, and Furniture

Hanging Hooks

Hang tools, hoses, garments, and other supplies on walls for easy access

Pallet Rack Locking Pins

Pallet Rack Locking Pins

Prevent forklifts from dislodging pallet rack beams when loading and unloading pallets

Communication

Reference Charts

Reference Charts

Check decimal equivalents, drill sizes, or specifications for socket screws

Fluid Handling

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.)