M8 Threaded Inserts | McMaster-Carr

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System of Measurement

Threaded Insert Type

Thread Pitch

Material

Grade 2 Titanium

Stainless Steel

For Tap Thread Size

For Use In

Dissimilar Metals

Stainless Steel

Installed Length

0.25" to 0.499"

10 mm to 19.9 mm

20 mm to 24.9 mm

25 mm or greater

For Tap Type

Thread Type

For Tap Thread Pitch

End Type

Thread Spacing

Drill Bit Size

Key-Locking Insert Wall Type

Number of Locking Keys

Helical Insert Type

For Material Thickness

0.000 mm to 5.000 mm

0.400 mm to 4.000 mm

0.400 mm to 11.100 mm

0.500 mm to 2.500 mm

0.500 mm to 3.000 mm

0.500 mm to 7.100 mm

0.5 mm to 4.2 mm

0.700 mm to 3.000 mm

0.700 mm to 3.800 mm

0.800 mm to 4.000 mm

Nut Type

Thread Direction

Right Hand and Left Hand

Finish

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Zinc Yellow-Chromate Plated

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

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

Export Control Classification Number (ECCN)

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336 Products

About Threaded Inserts

Choose the right threaded insert for your application and learn how to install it securely.

Threaded Inserts

Key-Locking Inserts

Key-Locking Threaded Inserts for Soft Metal

Key-Locking Threaded Inserts for Soft Metal

Add strong threads in soft metal, such as aluminum

Key-Locking Threaded Insert Assortments with Installation Tools

Key-Locking Threaded Insert Assortments with Installation Tools

What you need to add or repair a range of thread sizes in soft metal

Mil.-Spec. Key-Locking Threaded Inserts For Soft Metal

Mil.-Spec. Key-Locking Threaded Inserts For Soft Metal

Manufactured and tested to meet or compare to strict U.S. military standards

Key-Locking Threaded Inserts with Installation Tools

Key-Locking Threaded Inserts with Installation Tools

Paired with the right tool for installation to create strong threads in soft metal

Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal

Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal

Create the tightest hold in aluminum and other soft metal without screws sticking

Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal

Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal

Tap the thread size you need for a custom insert

Thread-Locking Inserts

Thread-Locking Threaded Inserts

Thread-Locking Threaded Inserts

Adhesive on the threads keeps inserts from backing out or vibrating loose

Thread-Locking Threaded Insert Assortments

Thread-Locking Threaded Insert Assortments

Include various sizes of thread-locking inserts that won’t back out or loosen from vibration

Thread-Locking Threaded Inserts with Installation Tools

Thread-Locking Threaded Inserts with Installation Tools

What you need to add or repair threads quickly in parts under stress or vibration

Helical Inserts

Helical Threaded Inserts

Helical Threaded Inserts

Restore, reinforce, or create threads in metal

Helical Threaded Insert Assortments with Installation Tools

Helical Threaded Insert Assortments with Installation Tools

Inserts and a range of tools for new threads and repairs

Helical Threaded Inserts with Installation Tools

Helical Threaded Inserts with Installation Tools

Quickly restore stripped threads with inserts and their compatible tools

Lubricant-Free Seize-Resistant Helical Threaded Inserts

Lubricant-Free Seize-Resistant Helical Threaded Inserts

No lubricant means no mess or particles to contaminate environments such as clean rooms and labs

Screw-Locking Helical Threaded Inserts

Screw-Locking Helical Threaded Inserts

Irregularly shaped threads tightly grip screws to prevent loosening or backing out under vibration

Seize-Resistant Helical Threaded Inserts for Dissimilar Metals

Seize-Resistant Helical Threaded Inserts for Dissimilar Metals

Coated to resist galvanic corrosion when used with aluminum or magnesium

Seize-Resistant Helical Threaded Inserts

Seize-Resistant Helical Threaded Inserts

Install and remove screws repeatedly without sticking or binding

Screw-Locking Seize-Resistant Helical Threaded Inserts

Screw-Locking Seize-Resistant Helical Threaded Inserts

Screws won't get stuck or come loose

Tapping Inserts

Tapping Threaded Inserts for Softwood

Tapping Threaded Inserts for Softwood

The large external threads cut and grab softwood for a secure hold

Tapping Threaded Inserts for Soft Metal

Tapping Threaded Inserts for Soft Metal

Cut their own threads, so there’s no need to tap the hole

Tapping Threaded Inserts for Plastic

Tapping Threaded Inserts for Plastic

Add strong, reusable metal threads to plastic

Tapping Threaded Inserts for Hardwood

Tapping Threaded Inserts for Hardwood

The sharp threads on these inserts cut into hardwood for a secure hold

Tapping Threaded Insert Assortments for Soft Metal

Tapping Threaded Insert Assortments for Soft Metal

Cut a variety of thread sizes into aluminum and other soft metal—no taps required

Heat-Set Inserts

Heat-Set Threaded Inserts for Plastic

Heat-Set Threaded Inserts for Plastic

Create a secure base for fasteners in plastic, including brittle 3D printed parts

Tapered Heat-Set Threaded Inserts For Plastic

Tapered Heat-Set Threaded Inserts For Plastic

Easier to align in a hole during installation than straight inserts

Any-Orientation Heat-Set Threaded Inserts for Plastic

Any-Orientation Heat-Set Threaded Inserts for Plastic

Install from either side—no need to check which end is up

Tapered Male Heat-Set Threaded Inserts for Plastic

Tapered Male Heat-Set Threaded Inserts for Plastic

Guide the tapered end into a hole for quick and accurate alignment

Male Heat-Set Threaded Inserts for Plastic

Male Heat-Set Threaded Inserts for Plastic

Mount components directly to plastic parts

Press-In Inserts

Screw-to-Expand Press-In Threaded Inserts for Plastic

Screw-to-Expand Press-In Threaded Inserts for Plastic

Press into a drilled hole, then install a screw to expand

Press-In Threaded Inserts for Soft Metal

Press-In Threaded Inserts for Soft Metal

Push into untapped holes to add threads in aluminum and other soft metal

Twist-Resistant Press-In Threaded Inserts for Plastic

Twist-Resistant Press-In Threaded Inserts for Plastic

The hex-shaped body resists loosening and twisting in a round hole

Screw-to-Expand Press-In Threaded Inserts For Through Holes in Plastic

Screw-to-Expand Press-In Threaded Inserts For Through Holes in Plastic

Install from the underside of your material, and the flange keeps inserts from going too far

Strong-Grip Screw-to-Expand Press-In Threaded Inserts for Plastic

Strong-Grip Screw-to-Expand Press-In Threaded Inserts for Plastic

Fins cut into material for a more secure hold than other screw-to-expand inserts

Hammer-In Inserts

Tee-Nut Threaded Inserts for Wood

Tee-Nut Threaded Inserts for Wood

A four-pronged flange resists twisting in hardwood and softwood

Mold-In Inserts

Mold-In Threaded Inserts for Plastic

Mold-In Threaded Inserts for Plastic

Mold the strongest metal threads into plastic parts

Twist-Resistant Closed-End Mold-In Threaded Inserts for Plastic

Twist-Resistant Closed-End Mold-In Threaded Inserts for Plastic

Hold fast against twisting and pulling

Closed-End Mold-In Threaded Inserts for Plastic

Closed-End Mold-In Threaded Inserts for Plastic

Prevent molten plastic from seeping in and clogging the threads

Other Products

Threaded Insert Installation Tools

Threaded Insert Installation Tools

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

Rivet Nuts

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

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

Threaded Insert Removal Tools

Threaded Insert Removal Tools

Turn counterclockwise to extract helical inserts

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

Weld Nuts

Weld to metal surfaces to add permanent threads

Heat-Set Insert Tips

Heat-Set Insert Tips

Attach to soldering irons to heat inserts for installing them in or removing them from plastic parts

Adhesive-Mount Nuts

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

Socket Nuts

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

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

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