M4 Reducers | McMaster-Carr

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System of Measurement

Material

Stainless Steel

Hex Length

Threaded Insert Type

Gender

Hex Size

Thread Pitch

For Use In

Thread Length

Pitch

Installed Length

0.25" to 0.499"

10 mm to 19.9 mm

20 mm to 24.9 mm

Length

Thread Type

Finish

Dry Film Lubricated

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Zinc Yellow-Chromate Plated

For Adapting

Shape

REACH

RoHS

Compliant with Exemptions

For Tap Thread Size

Thread Fit

Metric Class 4H

Metric Class 4H6H

Metric Class 6g

Metric Class 6G

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

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

Export Control Classification Number (ECCN)

DFARS Specialty Metals

End Type

Drill Bit Size

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408 Products

Fastening and Joining

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

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

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