5/16"-18 Reducers | McMaster-Carr

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System of Measurement

Material

Stainless Steel

Hex Length

Threaded Insert Type

Gender

Thread Length

Hex Size

For Use In

For Adapting

For Tap Thread Size

Installed Length

0.25" to 0.499"

10 mm to 19.9 mm

Length

Thread Type

DFARS Specialty Metals

Finish

Dry Film Lubricated

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Zinc Yellow-Chromate Plated

Export Control Classification Number (ECCN)

REACH

RoHS

Compliant with Exemptions

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

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

End Type

Drive Style

Shape

For Material Thickness

0.000" to 0.197"

0.015" to 0.156"

0.020" to 0.150"

0.020" to 0.280"

0.02" to 0.165"

0.027" to 0.15"

0.030" to 0.105"

0.030" to 0.125"

0.031" to 0.157"

0.060" to 0.138"

0.079" to 0.157"

0.105" to 0.175"

0.125" to 0.200"

0.138" to 0.236"

0.15" to 0.312"

0.156" to 0.375"

0.157" to 0.276"

Drill Bit Size

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641 Products

Thread Adapters

Male-Female Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread size and spacing

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-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

Other Products

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Gear Box Mounts

Gear Box Mounts

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

Rivet Nuts

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

Screw-Mount Nuts

Screw-Mount Nuts

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

Socket Nuts

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

Shaft Couplings

Shaft Couplings

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

Studs

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

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