DIN | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Thread Pitch

Fastener Head Type

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Drive Style

Hex with Pilot Recess

Specifications Met

Threading

Threaded on Both Ends

Screw Size

Fastener Strength Grade/Class

Thread Type

UN/UNF (SAE Straight)

Thread Spacing

Thread Direction

Head Height

Head Diameter

Socket Head Profile

Width

Nut Type

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

24,422 Products

Fastening and Joining

Socket Head Screws

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

2,696 products

Hex Head Screws

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

2,250 products

Flat Head Screws

Fit in countersunk holes for a flush finish

1,494 products

Set Screws

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

1,556 products

Rounded Head Screws

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

1,185 products

Tapping Screws

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

385 products

Thumb Screws

Tighten and loosen by hand without the need for tools

151 products

Shoulder Screws

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

127 products

Carriage Bolts

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

58 products

Wood Screws

Fasten material to wood or pieces of wood to each other

75 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

266 products

Hex Nuts

Handle most general fastening needs

984 products

Flange Nuts

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

221 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

47 products

Cap Nuts

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

54 products

Square Nuts

Flat sides won’t spin in channels and square holes

44 products

Coupling Nuts

Connect and extend threaded rods

90 products

Washers

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

724 products

Lock Washers

Resist vibration to prevent fasteners from loosening

551 products

Leveling Washers

Curved or tapered to compensate for uneven mounting surfaces

71 products

Sealing Washers

Prevent fluids from leaking around fasteners

108 products

Retaining Rings

Hold components on a shaft

762 products

Spring Pins

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

401 products

Dowel Pins

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

394 products

Cotter Pins

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

172 products

Taper Pins

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

232 products

Clevis Pins

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

28 products

Machine Keys

Transmit torque from rotating shafts to gears, sprockets, and other machine parts

563 products

Shims

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

106 products

Threaded Rods

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

1,040 products

Threaded Inserts

Create new threads or repair stripped threads

137 products

Rivets

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

80 products

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

55 products

Spanner Wrenches

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

41 products

Combination Wrenches

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

20 products

Sockets

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

12 products

L-Keys

Turn fasteners from either end and reach into tight spots

26 products

Screwdriver Bits

Pair with drivers to turn screws

1 product

Electrical

DIN Rail Mounting Adapters

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

14 products

DIN Rails

Mount terminal blocks, power supplies, relays, and other devices on walls and in enclosures

40 products

DIN Rail Spacers

Slide along rails to separate and organize terminal blocks, relays, and other components

1 product

DIN Rail Stops

Keep components such as terminal locks and relays from shifting on rails

11 products

DIN Rail Mounting Brackets

Create space behind rails to fit wiring and bulky components

12 products

Electrical Enclosures

House and protect power supplies, control panels, and other electrical equipment

348 products

Conduit and Conduit Fittings

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

17 products

Electrical Cords

Connect equipment and devices to a power supply

49 products

Ferrules

Turn stranded wire into one rigid wire for easy insertion

116 products

Edge Controllers

Use in automated systems to monitor sensors, control actuators, and support wireless connections

1 product

Programmable Logic Controllers

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

8 products

Limit Switches

Turn equipment on or off when objects touch the actuator; often used for conveyors and bin filling

2 products

Computers

Sturdy and reliable for harsh industrial jobsites, from frigid freezers to sweltering foundries

3 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

2 products

Power Transmission

Bearing Nuts

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

155 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

54 products

Ball Bearings

Create less friction than other bearings for use at high speeds

148 products

Roller Bearings

Support higher loads than ball bearings, but run at lower speeds

135 products

Thrust Bearings

Support loads parallel to the shaft with plain, ball, or roller bearings

30 products

Rod Ends

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

330 products

Springs

Apply and absorb force with compression, die, extension, torsion, and disc springs

473 products

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

132 products

Sprockets

Mount directly onto a shaft to transmit rotary motion and torque

196 products

Lead Screws and Nuts

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

50 products

Shafts

Transmit power, motion, and speed between machine components

3 products

Fabricating and Machining

Setup Studs

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

235 products

Drill Bushings

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

782 products

T-Slot Nuts

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

12 products

T-Slot Bolts

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

18 products

Locating Pins

Install in fixturing plates or tables to position and secure workpieces

14 products

Fixturing Clamps

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

6 products

Locating and Support Buttons

Secure and position workpieces and fixtures from the bottom or side

8 products

Drill Bits

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

1,005 products

Ejector Pins

Push finished parts out of molds

136 products

Clamps

Hold workpieces securely in place

1 product

Reamers

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

23 products

Milling Machine Collets

Install in a milling machine collet chuck or holder to tightly grip tool bits

112 products

DIN Rail Cutters

Pull the lever to smoothly cut steel and aluminum DIN rail without leaving burs

3 products

Fluid Handling

Tube and Tube Fittings

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

366 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

93 products

Pipe and Pipe Fittings

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

329 products

Sights

Observe and monitor the contents of pipes, tanks, and other containers

9 products

Gauge Glass

Create or repair liquid-level gauges to monitor fluid levels in containers

9 products

Directional Control Valves

Manage the flow of fluids to move equipment in air- and hydraulic-powered systems

48 products

Flow-Adjustment Valves

Gradually open and close to control the volume of air and liquids though a line

7 products

On-Off Valves

Start and stop flow through a line

6 products

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

3 products

Vacuum Transmitters

Transfer vacuum measurements to remote displays and controllers

3 products

Vacuum Switches

Activate controls, set off alarms, and power equipment when a set vacuum is reached

2 products

Pressure and Vacuum Transmitters

Convert pressure and vacuum measurements into a signal sent to remote displays and controllers

20 products

RTDs

Measure and transmit liquid, gas, and surface temperature more precisely than thermocouples

63 products

Sealing

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

201 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

39 products

O-Rings

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

196 products

Lubricating

Grease Fittings

Create an inlet on equipment and machinery for injecting lubricant; also known as Zerk fittings

155 products

Material Handling

Eyebolts

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

26 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

285 products

Pipe Hangers

Suspend pipe, conduit, and tube from threaded rods, hooks, and straps

22 products

Hook and Loop Straps

Flexible and adjustable to secure bundles that are delicate and often increase or decrease in size

3 products

Measuring and Inspecting

DIN Panel Adapters

Make a meter face sit flush with a DIN cutout in a panel or enclosure

3 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

47 products

Hand Wheels

Rotate to adjust machinery, valves, drill presses, and other equipment

8 products

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

5 products

Pull Handles and Knobs

Open and close cabinets, drawers, and doors on machines and equipment

5 products

Turn Latches

Keep hatches, panels, and small doors shut with the twist of a handle

4 products

Drawer Slides

Smoothly guide drawers in and out of cabinets

5 products

Containers, Storage, and Furniture

Graduated Cylinders

Precisely measure and pour liquids

16 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation Jacketing

Guard pipe insulation from impact, moisture, and corrosion

2 products