5/16"-18 Reducers | McMaster-Carr

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System of Measurement

Material

Threaded Insert Type

Gender

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For Use In

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DFARS Specialty Metals

Finish

Zinc Yellow-Chromate Plated

REACH

Compliant

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RoHS

Compliant

Compliant with Exemptions

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

Yes

Tensile Strength

Less than 20,000 psi

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

Not Rated

Export Control Classification Number (ECCN)

EAR99

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 Material Thickness

Shape

Drive Style

670 Products

Thread Adapters

Male-Female Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread size and spacing

87 products

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

Connect float rods to float valves with the through hole

4 products

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric

80 products

Male Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Join two female-threaded parts with dissimilar inch thread sizes

50 products

Female Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Join two male-threaded parts with dissimilar inch thread sizes

47 products

Inch-to-Metric Female Hex Thread Adapters

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

44 products

Other Products

Threaded Inserts

Create new threads or repair stripped threads

244 products

Threaded Insert Installation Tools

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

62 products

Gear Box Mounts

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

2 products

Screw-Mount Nuts

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

1 product

Rivet Nuts

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

45 products

Shaft Couplings

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

12 products

Studs

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

2 products

Socket Nuts

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

1 product