1/4"-20 Reducers | McMaster-Carr

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Flexible Shaft Couplings

Gear Box Mounts

Gear Box Shafts

Pressure-Regulating Valves

Screw-Mount Nuts

Thread Adapters

Threaded Insert Installation Tools

Threaded Inserts

System of Measurement

Thread Type

Pipe Size

Material

Silicone Rubber

Stainless Steel

Gender

Hex Length

Thread Length

Shape

Hex Size

For Adapting

Threaded Insert Type

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

For Use In

Dissimilar Metals

Sandwich Panels

Stainless Steel

Drive Style

Finish

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Zinc Yellow-Chromate Plated

Fitting Connection

Nut Type

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Installed Length

Less than 0.25"

0.25" to 0.499"

10 mm to 19.9 mm

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

Width

REACH

Export Control Classification Number (ECCN)

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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

Inch-to-Inch Male-Female Hex Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread size and spacing

Inch-to-Metric Male-Female Hex Thread Adapters

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric

Female Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Join two male-threaded parts with dissimilar inch thread sizes

Inch-to-Metric Female Hex Thread Adapters

Inch-to-Metric Female Hex Thread Adapters

Join two male-threaded parts with inch and metric thread sizes

Male Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Join two female-threaded parts with dissimilar inch thread sizes

Inch-to-Metric Male Hex Thread Adapters

Inch-to-Metric Male Hex Thread Adapters

Join inch and metric female-threaded parts

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

Gear Box Mounts

Gear Box Mounts

Secure gear boxes that can’t be attached directly to a machine or other surface

Gear Box Shafts

Gear Box Shafts

Convert output drives from female to male

Pressure-Regulating Valves

Pressure-Regulating Valves

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

Threaded Insert Installation Tools

Threaded Insert Installation Tools

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

Flexible Shaft Coupling Hubs

Flexible Shaft Coupling Hubs

Pair with spiders, discs, or grids for a complete flexible shaft coupling

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

Power Supplies

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

Socket Nuts

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

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