Steel Reducers | McMaster-Carr

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UN/UNF (SAE Straight)

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Female

Male

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For Use With

Grinders for Bits and Burs

Handheld Power Drills

Laser Gas

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Pharmaceuticals

Acetic Acid (White Vinegar) (10% Concentration)

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Connects To

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Compliant with Exemptions

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DFARS Specialty Metals

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Fitting Material

Tube Material

Sleeve Material

Plug Material

Thread Material

15,203 Products

Fluid Handling

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

2,912 products

Pipe Nipples and Pipe

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

67 products

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

102 products

Pipe Locknuts

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

1 product

Pipe Plugs

Insert into the ends of pipe to keep out dirt and debris

39 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

8 products

Tube Fittings

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

672 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

29 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

171 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

125 products

Pressure-Regulating Valves

Reduce inlet pressure to a lower outlet pressure to protect sensitive equipment

124 products

Pressure-Relief Valves

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

3 products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

2,379 products

Threaded Inserts

Create new threads or repair stripped threads

2,345 products

Rivet Nuts

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

367 products

Spacers

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

1,219 products

Standoffs

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

12 products

Socket Nuts

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

36 products

Unthreaded Inserts

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

49 products

Studs

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

13 products

Socket Adapters

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

200 products

Wrench Heads

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

2 products

Sockets

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

24 products

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

6 products

Electrical

Conduit-to-Conduit Connectors

Join pieces of conduit

12 products

Conduit Knockout Reducers

Shrink knockout sizes in electrical boxes to connect smaller conduit

19 products

Raceway and Raceway Fittings

Route and guard wiring along indoor surfaces

5 products

Power Supplies

Convert your facility's AC voltage to power equipment that runs on DC voltage

134 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

3 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

4 products

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

15 products

Power Transmission

Gear Boxes

Adjust motor speed to achieve the right torque for your machine; transmit motion at a 90° angle

110 products

Bore Reducers

Adapt the bore of a component to a smaller size for mounting on a shaft

25 products

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

1,977 products

Shaft Adapters

Increase or reduce your shaft's diameter to fit equipment, or replace damaged shaft ends

54 products

Shear Couplings

Sever the connection between shafts when there's too much torque to protect parts from breaking

21 products

Machinable Shaft Ends

Mill custom pulleys, threaded hubs, sprockets, collars, and sensor targets and mount them to shafts

56 products

Pulley and Sprocket Bushings

Mount between a rotating shaft and equipment to secure the shaft and reduce vibration

118 products

Rod Ends

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

6 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

71 products

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

29 products

Compressed Air Filter/Regulators

Simultaneously clean air that's running through a system and control its pressure

45 products

Compressed Air Regulators

Ensure continuous, safe operation of air-powered equipment by controlling air pressure

4 products

Heating, Ventilation, and Air Conditioning

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

94 products

Duct Noise Reducers

Muffle noise from high-velocity airflow and fans, blowers, and dust collectors

36 products

Material Handling

Wheel Reducer Bushings

Reduce the inside diameter of a bearing to fit a particular axle size

16 products

Box Reducers

Cut tall boxes down to the size you need and save on shipping costs

1 product

Fabricating and Machining

Saw Blade Arbor Adapters

Convert a diamond arbor hole to a round arbor hole

1 product

Saw Blade Bushings

Shrink the diameter of your saw blade's arbor hole to fit your saw's arbor

7 products

Wheel Brush Arbor Hole Reducers

Adjust arbor hole size so it'll fit the shaft of your tool

7 products

Building and Machinery Hardware

Access Panels

Install in ceilings, walls, concrete floors, and tanks to access and inspect inside

6 products

Facility and Grounds Maintenance

Water Hammer Arresters

Absorb shock of sudden shutoffs to prevent knocking noises in water pipes

4 products