UNC Reducers | McMaster-Carr

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System of Measurement

Thread Size

Material

Silicone Rubber

Stainless Steel

Thread Type

UN/UNF (SAE 45°)

UN/UNF (SAE Straight)

Pipe Size

Threaded Insert Type

Gender

For Use In

Dissimilar Metals

Sandwich Panels

Stainless Steel

Shape

Installed Length

Less than 0.25"

0.25" to 0.499"

10 mm to 19.9 mm

Hex Length

Thread Length

Hex Size

For Tap Thread Size

For Adapting

End Type

For Material Thickness

0.010" to 0.06"

0.010" to 0.075"

0.010" to 0.08"

0.010" to 0.085"

0.015" to 0.050"

0.015" to 0.094"

0.015" to 0.156"

0.015" to 0.437"

0.016" to 0.188"

0.020" to 0.079"

0.020" to 0.085"

0.020" to 0.100"

0.020" to 0.118"

0.020" to 0.150"

0.020" to 0.175"

Nut Type

Thread Fit

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Thread Direction

Right Hand and Left Hand

Drill Bit Size

DFARS Specialty Metals

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

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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1,959 Products

Thread Adapters

Male-Female Thread Adapters

Inch-to-NPT Male-Female Hex Thread Adapters with Through Hole

Inch-to-NPT Male-Female Hex Thread Adapters with Through Hole

Connect float rods to float valves with the through hole

Inch-to-NPT Male-Female Hex Thread Adapters

Inch-to-NPT Male-Female Hex Thread Adapters

Connect float balls, float rods, and valves

Other Products

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Rivet Nuts

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

Socket Nuts

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

Studs

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

Screw-Mount Nuts

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

Threaded Insert Installation Tools

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)