Mechanical Joints | McMaster-Carr

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Adjustable-Angle Elbow

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UN/UNF (SAE Straight)

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Threaded on Both Ends

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Specifications Met

ANSI/BHMA A156.26 Grade 1

Federal Specification

33,997 Products

Power Transmission

Rod Ends

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

1,646 products

Rod End Nuts

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

8 products

Swivel Joints

Handle shaft misalignment where ball joint rod ends won’t fit; also known as spherical bearings

136 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

174 products

Shear Couplings

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

22 products

Shaft Adapters

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

54 products

Flexible Shafts

Snake around curves and obstructions to transmit rotary motion along any path

41 products

Shaft Couplings

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

2,110 products

Machinable Shaft Ends

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

56 products

Bore Reducers

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

31 products

Gas Spring End Fittings

Connect gas springs to mounting studs and brackets

65 products

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

29 products

Torque Limiters

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

52 products

Air Flow Control Valves

Control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting

202 products

Pivot Bearings

Best for applications that require small, precise oscillating motion with limited twisting

20 products

Fluid Handling

Pipe and Pipe Fittings

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

21,696 products

Pipe Repair Clamps

Fix small holes and cracks in pipe without taking your system apart

244 products

Tube Repair Clamps

Mend small holes, cracks, and full-circle breaks in tubing without dismantling your system

18 products

Tube and Tube Fittings

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

145 products

Hose and Hose Fittings

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

24 products

On-Off Valves

Start and stop flow through a line

437 products

Flow-Adjustment Valves

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

67 products

Building and Machinery Hardware

Positioning Arms

Mount and position tools, small electronics, and displays

251 products

Clamp-On Framing and Fittings

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

214 products

Positioning Arm Mounts

Add a mounting surface to positioning arms

4 products

T-Slotted Framing and Fittings

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

853 products

Strut Channel Framing and Fittings

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

19 products

Slip-On Framing and Fittings

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

375 products

Press-Fit Framing and Fittings

Set up temporary partitions, guards, and displays using only a hammer

38 products

Locking-Slotted Framing and Fittings

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

6 products

Flush-Fit Framing and Fittings

Create smooth stair and platform railings by sliding fittings into rails and tightening the screws

10 products

Prop Rods

Prop hood, trunk, and other lids open at a variety of angles

1 product

Lid Supports

Keep lids on cabinets, hatches, and chests open and then close them smoothly or softly

61 products

Door Installation Kits

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

12 products

Brackets

Connect surfaces in an assembly

350 products

Control Cables

Weave around obstructions to operate valves, throttles, and other machinery from a distance

84 products

Hasps

Swing the arm over the strike plate and secure with a padlock or key to lock doors and containers

81 products

Padlockable Eyes

Mount to a door and its frame and secure with a padlock to keep doors closed

4 products

Hinges

Mount to doors, windows, and panels so they can swing open and closed

1,569 products

Door Tracks

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

32 products

Hasp Strike Plates

Receive the arm of your hasp and secure with a padlock to lock doors and containers

12 products

Lubricating

Coolant Hose and Nozzle Adapters

Connect threaded coolant hose and nozzles to coolant supply ports on equipment such as CNC machines

4 products

Coolant Dispenser Hose and Fittings

Snap together and position to deliver coolant, oil, water, or air in any direction

90 products

Fastening and Joining

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

3 products

Weld Nuts

Weld to metal surfaces to add permanent threads

12 products

Sockets

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

162 products

Socket Adapters

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

36 products

Wood Joiners

Connect and repair wood pieces and joints

9 products

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

6 products

Bit Sockets

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

12 products

Electrical

Weatherheads

Bring power into buildings and protect the entry point from rain and snow

10 products

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

10 products

Conduit and Conduit Fittings

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

326 products

Material Handling

Hitch Balls

Mount to hitch inserts and use with hitch receivers and couplers to tow trailers

9 products

Hitch Receivers

Use with hitch inserts and pins to create a complete hitch for towing

2 products

Tow Eyes

Mount to trailers and connect to tow hooks or drawbar couplers on vehicles for towing

6 products

Hitch-Ball Couplers

Bolt or weld to trailers and connect to hitch balls on vehicles for towing

6 products

Tow Hooks

Bolt to vehicles and connect to tow eyes on trailers for towing

1 product

Conveyor Track Brackets

Hang and join sections of enclosed conveyor track

1 product

Drawbar Couplers

Use with drawbar rings to connect trailers to vehicles; also known as pintle hitches

12 products

Vacuum Cup Swivels

Rotate and flex so your vacuum cups can grip items at an angle

2 products

Hitch Inserts

Fit into hitch receivers and secure with a hitch pin to create a connection for towing

19 products

Screw Jack End Fittings

Thread onto screw jacks to create pivot points with clevis rod ends and other linkages

4 products

Hitch-Ball Coupler Locks

Insert into the hitch-ball coupler latch or socket on your trailer to prevent theft

4 products

Containers, Storage, and Furniture

Table Leg Hinges

Add legs and mount to tabletops to create folding tables

4 products

Facility and Grounds Maintenance

Chain Link Fencing

Everything you need to build or repair a chain link fence, from posts to gates

6 products

Heating, Ventilation, and Air Conditioning

Diffuser Collars

Connect diffusers to duct

4 products

Duct and Duct Fittings

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

1,316 products

Chimney Pipe and Fittings

Exhaust hot air and fumes from boilers, furnaces, and stoves

16 products