Hardware Kits | McMaster-Carr

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Spring Lock Washers Included

For M4 Screw Size (200 Pieces)

For M5 Screw Size (200 Pieces)

For M6 Screw Size (200 Pieces)

For M8 Screw Size (200 Pieces)

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DFARS Specialty Metals

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Export Control Classification Number (ECCN)

EAR99

Rounded Head Sheet Metal Screws Included

No. 4 × 1/2" Lg. (75 Pieces)

No. 6 × 1" Lg. (50 Pieces)

No. 6 × 1/2" Lg. (50 Pieces)

No. 6 × 1/2" Lg. (75 Pieces)

No. 6 × 3/4" Lg. (50 Pieces)

No. 6 × 3/8" Lg. (50 Pieces)

No. 6 × 5/8" Lg. (75 Pieces)

No. 8 × 1 1/2" Lg. (25 Pieces)

No. 8 × 1" Lg. (25 Pieces)

No. 8 × 1/2" Lg. (50 Pieces)

No. 8 × 3/4" Lg. (50 Pieces)

No. 10 × 1 1/2" Lg. (20 Pieces)

No. 10 × 1 1/4" Lg. (20 Pieces)

No. 10 × 1" Lg. (25 Pieces)

No. 10 × 1" Lg. (50 Pieces)

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2,982 Products

Fastening and Joining

Fastener Assortments

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

13 products

Hex Head Screws

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

10 products

Socket Head Screws

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

19 products

Rounded Head Screws

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

6 products

Set Screws

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

9 products

Flat Head Screws

Fit in countersunk holes for a flush finish

4 products

Tapping Screws

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

11 products

Shoulder Screws

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

2 products

Wood Screws

Fasten material to wood or pieces of wood to each other

3 products

Hex Nuts

Handle most general fastening needs

7 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

4 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

1 product

Cap Nuts

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

2 products

Washers

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

13 products

Lock Washers

Resist vibration to prevent fasteners from loosening

7 products

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

1 product

Sealing Washers

Prevent fluids from leaking around fasteners

2 products

Rivet Nuts

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

28 products

Threaded Inserts

Create new threads or repair stripped threads

110 products

Hog Rings

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

1 product

Retaining Rings

Hold components on a shaft

32 products

Threaded Rods

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

2 products

Screwdrivers

Tighten and loosen screws

93 products

One-Way Screw Removers

Loosen and remove one-way screws

1 product

Driver Shafts

Attach to a handle to create your own driver tool, or pair with socket wrenches and power tools

1 product

Screwdriver/Nutdrivers

Quickly switch between driving screws and driving nuts

4 products

Screwdriver Bits

Pair with drivers to turn screws

63 products

Nutdrivers

Tighten and loosen nuts and bolts

14 products

Sockets

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

154 products

Bit Sockets

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

100 products

Socket Adapters

Make your socket more versatile, from converting the drive to limiting torque

22 products

Box Wrenches

Grip all sides of a fastener to prevent slipping

19 products

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

27 products

Combination Wrenches

Use the open end when tightening in cramped spaces and the box end when you need extra grip

57 products

Socket Inserts

Slip into sockets to keep fasteners from falling out

3 products

Spanner Wrenches

Grab onto holes and slots to turn collars, bearings, and other machine tool components

6 products

Strap Wrenches

Grip plastic and high-polished pipe, tubing, hand wheels, and filters without marring the surface

1 product

Wrench Heads

Attach to your ratchet wrench and socket extension to turn fasteners where clearance is limited

15 products

Socket Wrenches

Apply torque to turn nuts, bolts, and other fasteners without rounding the heads

2 products

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

3 products

Adjustable Wrenches

Adjust the jaws to fasten different size nuts, bolts, or workpiece

7 products

Socket Bits

Switch out worn or damaged bits instead of replacing your entire bit socket

1 product

Pin Removal Punches

Strike with a hammer to loosen and remove pins and rivets

26 products

Screw, Pipe, and Stud Extractors

Remove broken screws, pipes, and studs without damaging the threads around them

61 products

Nail Set Punches

Set nails flush or drive them out of view without damaging wood surfaces

1 product

Retaining Ring Pliers

Install and remove rings inside a bore or around a shaft

35 products

Electrical

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Electrical Enclosure Pole Mounts

Everything you need to secure enclosures to round poles or beams

14 products

Electrical Cable Hardware Kits

Hang equipment from drop-down cable

1 product

Wire and Cable Strippers

Remove the outer insulation on wire and cable

2 products

Fabricating and Machining

Tweezers

Grasp small objects that are too small to pick up by hand

15 products

Picks

Hold, separate, and position small parts such as wire and springs

28 products

Vise Repair Kits

Replace commonly worn parts in vises

10 products

Locking Pliers

Clamp workpieces and lock them in place to keep your hands free

5 products

Hub and Fan Blade Grip Pullers

Remove press-fit hubs and fan blades from motor shafts

1 product

Pliers Sets

A variety of pliers styles and sizes for whatever job comes up

15 products

Wire-Twisting Pliers

Grip or attach wire then twist to secure fasteners or electrical connections

1 product

Bearing and V-Belt Pulley Separator Sets

Separate bearings or V-belt pulleys of various sizes with these sets

1 product

Clamps

Hold workpieces securely in place

4 products

Gear and Bearing Pullers

Remove gears and bearings from hollow shafts and housings

11 products

Small Parts Positioners

Position and install tiny springs and wires

2 products

Packing Seal Pullers

Pull packing out of pump and valve seals

25 products

Adjustable Pliers

A range of jaw positions for turning fasteners and gripping workpieces

6 products

Tap, Die, and Drill Bit Sets

Cut and repair internal and external threads and drill holes in many different sizes

1 product

Tap Extractors

Grip the flutes on a broken tap to remove it without damaging the surrounding threads

7 products

Taps

Cut internal threads for fasteners, pipe, conduit, and more

364 products

Tap, Die, and Thread File Sets

Repair internal and external threads in a range of sizes

1 product

Pipe Threaders

Cut external threads in pipe and conduit with ratcheting action or electric power

8 products

Tap and Die Sets

Cut and repair internal and external threads in many sizes

15 products

Tap and Die Wrench Sets

Switch between internal and external threading with interchangeable tap and die adapters

4 products

Dies

Cut or restore external threads on fasteners, pipe, or conduit

28 products

Thread-Repairing Files

Spot fix rusted and damaged threads along screws, pipe, or conduit

3 products

Countersinks

Cut a cone-shaped opening in a hole to install flat-head screws and rivets flush with the surface

88 products

Drill Taps

Drill and thread holes with the same bit

3 products

Counterbores

Enlarge the top of a hole to install socket and hex head screws flush with the surface

9 products

Cordless Tool Kits

A reciprocating saw, hammer drill, chargers, and more in an easy-to-carry tote bag

1 product

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

147 products

Hollow-Core Cutters

Use in magnetic-base drills to form burr-free holes by only cutting the outside edge of a hole

5 products

Center Drills

Drill cone-shaped openings to mate with lathe centers or start pilot holes for screws

17 products

Drill/Screwdriver Bits

Quickly change between drilling countersunk holes and driving screws

3 products

End Mills

Cut and shape material to create precise slots, grooves, and profiles

48 products

Reamers

Finish holes to an exact size, correct misaligned holes, and remove burrs

30 products

Hole Punches

Punch holes in metal, plastic, and fabric

37 products

Fly Cutters

Machine wide cuts on flat surfaces and leave a smoother finish than face mills

2 products

Fixture Kits

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

48 products

Multitools

A variety of tools and blades all in one

42 products

Fixture Clamps

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

4 products

Burs

Cut excess material to smooth surfaces and holes using a rotary power tool like a die grinder

21 products

Files

Deburr, polish, and sharpen nearly any material, such as metal, plastic, ceramic, and wood

58 products

Polishing Stones

Create a finer, more polished finish on tools, molds, and dies than sanding sticks

3 products

Sanding Drum and Sleeve Kits

Assortments include a variety of sanding drums and sleeves to shape and deburr internal surfaces

9 products

Lathe Tools

Shape workpieces as they rotate on a lathe

35 products

Deburring Tools

Changeable or fixed cutting blades shave rough edges from surfaces, holes, and pipe

21 products

Drill Chuck Jaw and Nut Kits

Replace jaws, nuts, thrust bearings, or washers in Jacobs drill chucks

15 products

Pry Bars

Slide under heavy objects to pry, lift, and position them

2 products

Containers, Storage, and Furniture

Toilet Partition Mounting Hardware

Mount and connect toilet and urinal partition components

20 products

Toilet Partition Door Hardware

Replace the hinges, latches, hooks, and handles on toilet partitions

7 products

Pegboard Organizer Kits

Use a range of hooks, holders, and bin boxes to organize tools on pegboard

7 products

Building and Machinery Hardware

Clamp-On Framing and Fittings

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

1 product

Door Installation Kits

Complete your door installation with a handle or knob, strike plate, and hinges

12 products

Sealing

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

24 products

Backup Rings

Extend the life of O-rings and improve their performance under high pressure

1 product

Fluid Handling

Valve Repair Kits

Maintain valves with replacement parts such as seals, plungers, and springs

160 products

Pump Repair Kits

Replace parts on transfer pumps, circulation pumps, and metering pumps

192 products

Pressurized Pipe Tapping Kits

Include the tools you need to add a new line without having to shut down your piping system

6 products

Facility and Grounds Maintenance

Tool Sets

Secure fasteners and complete a variety of other maintenance tasks

9 products

Faucet Repair Parts

Replace faucet parts such as valves, O-rings, washers, and nuts

82 products

Faucet Washers

Seal faucet components so they don’t leak

3 products

Measuring and Inspecting

Alignment Pins

Line up holes in sheet metal, I-beams, and angle irons for bolting, riveting, and welding

7 products

Pipe Flange Aligners

Line up flange holes so they bolt securely and connections won’t leak

3 products

Power Transmission

Belt Joining Kits

Everything you need to soften belt ends and join them together

12 products

Lighting

Light Hangers

Suspend lights from the ceiling

2 products