McMaster-Carr logo
    Filter by
    System of Measurement
    Threaded Insert Type
    Helical Insert Type
    For Tap Type
    Thread Type
    Installed Length
    Attribute Image
    End Type
    Thread Spacing
    Industrial Info Snippet
    Number of Inserts Included
    Thread Direction
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Industrial Info Compare
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Tensile Strength
    Industrial Info Snippet
    Profile
    Threaded Insert Securing Type
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    17 Products

    Easy-Start Helical Threaded Insert Installation Tools

    These tools compress the diameter of your insert so it fits easily into a tapped hole. They’re the best choice for preventing misaligned or damaged threads—just make sure you have space to turn the crank. Screw or slide an insert onto your tool and drive it between a quarter-turn and half-turn below the surface. Also known as prewinders.
    Threaded Insert Installation Tools with Depth Stop
    Image of Product. Front orientation. Threaded Insert Installation Tools. Easy-Start Helical Threaded Insert Installation Tools, Threaded Insert Installation Tools with Depth Stop, T-Handle.
    Image of Specification. Threaded Drive. Front orientation. ZoomedIn view. Threaded Drive Helical Insert Tool. Easy-Start Helical Threaded Insert Installation Tools, Threaded Insert Installation Tools with Depth Stop.

    T-Handle

    Threaded Drive

    Ensure consistent installation across multiple inserts. Set your desired installation depth, and the stop will prevent you from driving your insert any further.
    Threaded Drive Helical Insert Tool—These tools align each coil of your insert perfectly with the thread pitch of your tapped hole for easy installation.
    For Thread
    Size
    Mfr.
    Handle
    Style
    Helical Insert
    Tool Drive Type
    For Use With
    Each
    Standard (UN) Thread
    1-64
    		Heli-CoilT-HandleThreadedHelical Inserts, Screw-Locking Helical Inserts90261A1310000000
     

    Helical Threaded Insert Assortments with Installation Tools

    Image of Product. Front orientation. Threaded Inserts. Helical Threaded Insert Assortments with Installation Tools.
    Repair damaged threads or create new ones. These convenient assortments include helical inserts, an installation tool for each thread size, a drill bit, and a tap. The inserts are also known as Heli-Coil inserts.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    No. of Inserts
    Included
    Includes
    Thread
    Spacing
    Drill Bit Size
    For Max. Hole Dia.
    Each
    Pronged
     
    18-8 Stainless Steel
    2881-64 Thread × 0.11" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    2-56 Thread × 0.129" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    3-48 Thread × 0.148" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    4-40 Thread × 0.168" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    6-32 Thread × 0.207" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    8-32 Thread × 0.246" Installed Lg. (24 Inserts and 24 Screw-Locking Inserts)
    Drill Bits
    Installation Tools
    Through-Hole Taps    		Coarse
    		5/64"
    3/32"
    36 Ga.
    31 Ga.
    26 Ga.
    17 Ga.
    		0.078"
    0.094"
    0.107"
    0.120"
    0.147"
    0.173"    		90285A1340000000
     

    Prongless Helical Threaded Insert Installation Tools

    Image of Product. Front orientation. Threaded Insert Installation Tools. Prongless Helical Threaded Insert Installation Tools.
    These tools install prongless helical inserts, also known as tangless inserts. Screw the insert onto your installation tool and drive it between a quarter-turn and half-turn below the surface.
    For Thread
    Size
    Handle
    Style
    For Use With
    Each
    Standard (UN) Thread
    1-64
    		StraightHelical Inserts, Screw-Locking Helical Inserts91049A1010000000
     
    Replacement Tips
    Replacement installation tool tips (sold separately) include one installation tip, two pins, and two springs.
    For Thread
    Size
    Each
    1-64
    		91049A202000000

    Spring-Loaded Helical Threaded Insert Prong Break-Off Tools

    Image of Product. Front orientation. Threaded Insert Installation Tools. Spring-Loaded Helical Threaded Insert Prong Break-Off Tools.
    Cleanly snap prongs off installed helical inserts with just one hand. Because they work faster than standard prong break-off tools, these are a good choice when you have many prongs to remove. Press your tool into an insert to trigger the spring-loaded punch and snap off the prong.
    For Standard-Length Inserts—Use these tools for inserts that are 1 to 2 times as long as the diameter.
    For Thread
    Size
    Mfr.
    Each
    For Standard-Length Inserts
    1-64
    		Heli-Coil92955A2010000000
     

    Screw-Locking Helical Threaded Inserts

    Image of Product. Pronged. Bottom orientation. Threaded Inserts. Screw-Locking Helical Threaded Inserts, Pronged.

    Pronged

    The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration. Use these inserts to create or repair threads in pumps and other machinery that shakes and rattles. Also known as Heli-Coil inserts.
    Installation requires a drill bit, a helical insert tap, and an installation tool.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Through-Hole
    Taps
    Closed-End
    Hole Taps
    Installation
    Tools
    Prong
    Break-Off Tools
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    Each
    Each
    Pronged
     
    18-8 Stainless Steel
    1-64
    		0.073"46 Ga.
    		0.081"590296A0040000091709A09000000091709A68300000090261A131000000092955A2010000000
    1-64
    		0.110"46 Ga.
    		0.081"590296A008000091709A0900000091709A6830000090261A13100000092955A201000000
     

    Helical Threaded Inserts

    Image of Product. Pronged. Bottom orientation. Threaded Inserts. Helical Threaded Inserts, Pronged.
    Image of Product. Prongless. Bottom orientation. Threaded Inserts. Helical Threaded Inserts, Prongless.

    Pronged

    Prongless

    Restore, reinforce, or create threads in metal. The tough coils on these inserts expand once installed to anchor in a tapped hole. Also known as Heli-Coil inserts, they're often used in engine heads and machinery housings where strong connections are critical. Unlike threadlocking inserts, you can remove and reuse them without them losing their strength.
    Installation requires a drill bit, a helical insert tap, and an installation tool.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    Prongless—Without a prong to break off and retrieve, these inserts save time and avoid leftover debris in holes.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Through-Hole
    Taps
    Closed-End
    Hole Taps
    Installation
    Tools
    Prong
    Break-Off Tools
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    Each
    Each
    Pronged
     
    18-8 Stainless Steel
    1-64
    		0.073"46 Ga.
    		0.081"1091732A0040000091709A09000000091709A68300000090261A131000000092955A2010000000
    1-64
    		0.110"46 Ga.
    		0.081"1091732A008000091709A0900000091709A6830000090261A13100000092955A201000000
    1-64
    		0.146"46 Ga.
    		0.081"1091732A011000091709A0900000091709A6830000090261A13100000092955A201000000
     
    Prongless
     
    18-8 Stainless Steel
    1-64
    		0.073"46 Ga.
    		0.081"591990A504000091709A0900000091709A6830000091049A101000000———0
    1-64
    		0.110"46 Ga.
    		0.081"591990A505000091709A0900000091709A6830000091049A101000000———0
    1-64
    		0.146"46 Ga.
    		0.081"591990A506000091709A0900000091709A6830000091049A101000000———0
     
    Extraction Tools
    Remove installed helical inserts.
    For Pronged Helical Inserts—Place the tip into pronged inserts and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.
    For Prongless Helical Inserts—Remove prongless inserts without damaging threads or the surface of your material. These tools also back out or adjust inserts that are installed too deep.
    For Thread
    Size
    Each
    For Pronged Helical Inserts
    1-64, 1-72, M2
    		90254A3700000000
     
    For Prongless Helical Inserts
    1-64
    		91049A377000000
     
    back to top