UNC Plugs | McMaster-Carr

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System of Measurement

Thread Size

Material

Threaded Insert Type

For Use In

Installed Length

Length

End Type

For Tap Thread Size

Thread Direction

Fastener Head Type

Drive Style

Tamper-Resistant Torx

Drill Bit Size

Helical Insert Type

Thread Spacing

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Finish

Corrosion-Resistant Coated

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

2B999

EAR99

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

For Tap Type

Tensile Strength

20,000 psi to 39,999 psi

40,000 psi to 49,999 psi

50,000 psi to 99,999 psi

100,000 psi or greater

Hole Diameter

2,467 Products

Fastening and Joining

Hex Head Screws

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

78 products

Socket Head Screws

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

152 products

Rounded Head Screws

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

163 products

Flat Head Screws

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

114 products

Tapping Screws

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

16 products

Threaded Inserts

Create new threads or repair stripped threads

1,619 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

1 product

Standoff Caps

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

66 products

Measuring and Inspecting

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

19 products

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

132 products

Fluid Handling

Breather Vents

Maintain even pressure and vacuum as temperatures change by allowing airflow in tanks and enclosures

2 products

Pipe Plugs

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

1 product

Electrical Power, Networking, and Controlling

RJ45 Adapters

Connect two Ethernet cords together

7 products

Building and Machinery Hardware

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

94 products