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Insert(Length L (after insertion) (D = Thread Dia. M):2.5D)

These products are used for reinforcing female threads. These can be used with damaged female threads or soft materials to enable screws/bolts to be tightened.
In general, coil inserts that have been machined into a coil shape are very common, but we also have a wide lineup that includes "self-tapping inserts", "inserts for resin", "insert nuts", "locking inserts", etc., enabling use to suit various environments or materials.
MISUMI enables spec searches and ordering quantities from just 1 piece. Tools are also sold in addition to the inserts themselves.
[Materials]
Iron, stainless steel, brass, phosphor bronze, Inconel, nitronics
[Size]
M1.4 to M39 are available as well as imperial sizes
[Search Keywords]
Heli-Sert, E-Sert, Sprue, Female Thread

Search by specifying the lower class category

Days to Ship
  • All
  • Same day
  • 1 Day(s) or Less
  • 8 Day(s) or Less
  • 9 Day(s) or Less
  • 10 Day(s) or Less
  • 11 Day(s) or Less
  • 12 Day(s) or Less
  • 13 Day(s) or Less
  • 14 Day(s) or Less
  • 15 Day(s) or Less
  1. 1
Brand
Product Series
Days to Ship
Screw Dia. M (after insertion)(mm)
Environmentally friendly
Type
Characteristics/Applications
Material
Screw Type
Length L (after insertion) (D = Thread Dia. M)
Application
Notch
Thread Dia. (After inserted), Unified(inch)
Shape
Sales Unit
Cleaning Method
  • On Sale Till 31/03/2025

Recoil-Free (mm) SUS304

    Stainless Steel Insert Nut, Screw-in (Slotted)/IRU-S

      Brass Insert Nut (Screw-In Type) IRB/IRB-C

        Sprue (Unified) (UNC)

          Dodge Bit Insert Flange Type  (Brass Cadmium-Free)

            Stainless Steel Recoil

              Stainless Steel Insert Nut, Screw-in (Thread Locker / Slotted) / IRU-SW

                Sprue

                  E-Certs

                    Screwsert (Type SCT)

                      Stainless Steel E-Sert Fine (Hemlock-Made)

                        Stainless Steel/Aluminum Insert Nut Threaded Type (Loosening Prevention) / IRU-W

                          Brass Insert Nut (Screw-In Type / Slotted) IRB-S/IRB-SC

                            Dodge Insert Flange Type (Brass Cadmium-Less)

                              DODGE BET Insert (Standard), Double Sided Chamfer Type, Brass (Cadmium-Free)

                                Dodge Bit Insert (Standard) SB Brass (Cadmium-Free)

                                  Dodge Bit Insert Standard SD (Brass Cadmium-Less)

                                    Techlock (SL)

                                      FLO-TECH (FTC Type)

                                        Brass Insert Nut (Screw-In Type) IRB-W/-CW

                                          Stainless Steel/Insert Nut Threaded Type / IRU

                                            Aluminum Insert Nut (Screw-In Type) IRL-B/IRL-K

                                              Aluminum Insert Nut (Screw-In Type / Coated With Loosening Prevention Agent) IRL-BW/-KW

                                                Brass Insert Nut (Screw-In Type / Slotted) IRB-SW/-SCW

                                                  Brass Dutch Insert (Standard) / HSD

                                                    Brass Dutch Insert (Flanged) / HFD

                                                      Brass Bit Insert (Standard Model / Single-Sided Type) HSB

                                                        Brass Bit Insert (Standard, Double-sided) HSB-Z

                                                          Brass Bit Insert (Flange Type) / HFB

                                                            Brass Ultrasert II/HUD II

                                                              Brass Ultrasert IV (Flanged) / HFU

                                                                Nylon Nut Insert / NNI

                                                                Brand

                                                                RECOIL

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                NIPPON SPREW

                                                                TOKAI METAL INDUSTRY

                                                                SUNCO

                                                                HIROSUGI-KEIKI

                                                                NIPPON SPREW

                                                                TSUGAMI

                                                                JAPAN DRIVEIT

                                                                SUNCO

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                TOKAI METAL INDUSTRY

                                                                TOKAI METAL INDUSTRY

                                                                TOKAI METAL INDUSTRY

                                                                TOKAI METAL INDUSTRY

                                                                JAPAN DRIVEIT

                                                                JAPAN DRIVEIT

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                HIROSUGI-KEIKI

                                                                Product Series

                                                                Recoil-Free (mm) SUS304

                                                                Stainless Steel Insert Nut, Screw-in (Slotted)/IRU-S

                                                                Brass Insert Nut (Screw-In Type) IRB/IRB-C

                                                                Sprue (Unified) (UNC)【1-100 Pieces Per Package】

                                                                Dodge Bit Insert Flange Type (Brass Cadmium-Free)

                                                                Stainless Steel Recoil【100 Pieces Per Package】

                                                                Stainless Steel Insert Nut, Screw-in (Thread Locker / Slotted) / IRU-SW

                                                                Sprue【1-100 Pieces Per Package】

                                                                E-Certs【1-100 Pieces Per Package】

                                                                Screwsert (Type SCT)

                                                                Stainless Steel E-Sert Fine (Hemlock-Made)【100 Pieces Per Package】

                                                                Stainless Steel/Aluminum Insert Nut Threaded Type (Loosening Prevention) / IRU-W

                                                                Brass Insert Nut (Screw-In Type / Slotted) IRB-S/IRB-SC

                                                                Dodge Insert Flange Type (Brass Cadmium-Less)

                                                                DODGE BET Insert (Standard), Double Sided Chamfer Type, Brass (Cadmium-Free)【1-8,000 Pieces Per Package】

                                                                Dodge Bit Insert (Standard) SB Brass (Cadmium-Free)【1-1,000 Pieces Per Package】

                                                                Dodge Bit Insert Standard SD (Brass Cadmium-Less)

                                                                Techlock (SL)

                                                                FLO-TECH (FTC Type)【1-1,000 Pieces Per Package】

                                                                Brass Insert Nut (Screw-In Type) IRB-W/-CW

                                                                Stainless Steel/Insert Nut Threaded Type / IRU

                                                                Aluminum Insert Nut (Screw-In Type) IRL-B/IRL-K

                                                                Aluminum Insert Nut (Screw-In Type / Coated With Loosening Prevention Agent) IRL-BW/-KW

                                                                Brass Insert Nut (Screw-In Type / Slotted) IRB-SW/-SCW

                                                                Brass Dutch Insert (Standard) / HSD

                                                                Brass Dutch Insert (Flanged) / HFD

                                                                Brass Bit Insert (Standard Model / Single-Sided Type) HSB

                                                                Brass Bit Insert (Standard, Double-sided) HSB-Z

                                                                Brass Bit Insert (Flange Type) / HFB

                                                                Brass Ultrasert II/HUD II

                                                                Brass Ultrasert IV (Flanged) / HFU

                                                                Nylon Nut Insert / NNI

                                                                Days to Ship 8 Day(s) or more 21 Day(s) or more 15 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 21 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 15 Day(s) or more 15 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 8 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 21 Day(s) or more 21 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more 15 Day(s) or more
                                                                Screw Dia. M (after insertion)(mm)2 ~ 163 ~ 52 ~ 5-3 ~ 43 ~ 103 ~ 52 ~ 162.5 ~ 2068 ~ 143 ~ 53 ~ 531.6 ~ 41.6 ~ 42.6 ~ 622.5 ~ 63 ~ 52 ~ 52 ~ 53 ~ 53 ~ 52.6 ~ 52.6 ~ 41.6 ~ 41.6 ~ 42 ~ 42.6 ~ 44 ~ 65 ~ 8
                                                                Environmentally friendly--------------------------------
                                                                TypeStandardSelf-TappingSelf-TappingStandardStandardStandardSelf-TappingStandardStandardSelf-TappingStandardSelf-TappingSelf-TappingStandardStandardStandardStandardPress FitPress FitSelf-TappingSelf-TappingSelf-TappingSelf-TappingSelf-TappingPress FitPress FitPress FitPress FitPress FitPress FitPress FitPress Fit
                                                                Characteristics/Applications--------------------------------
                                                                MaterialStainless Steel (SUS303/304)Stainless Steel (SUS303/304)BrassStainless Steel (SUS303/304)BrassStainless Steel (SUS303/304)Stainless Steel (SUS303/304)Stainless Steel (SUS303/304) / Phosphor BronzeStainless Steel (SUS303/304)BrassStainless Steel (SUS303/304)Stainless Steel (SUS303/304)BrassBrassBrassBrassBrassBrassBrassBrassStainless Steel (SUS303/304)AluminumAluminumBrassBrassBrassBrassBrassBrassBrassBrassNylon
                                                                Screw TypeMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadUnified (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Fine) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) ThreadMetric (Coarse) Thread
                                                                Length L (after insertion) (D = Thread Dia. M)2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D2.5D
                                                                ApplicationLight MetalCast IronLight MetalLight MetalResin General-Cast IronLight MetalLight Metal / Cast Iron / Resin GeneralResin General-Cast IronLight MetalResin GeneralResin GeneralResin GeneralResin General--Light MetalCast IronLight MetalLight MetalLight MetalLight MetalLight MetalLight MetalLight MetalLight MetalLight MetalLight MetalResin General
                                                                NotchProvidedNot ProvidedNot ProvidedProvidedNot ProvidedProvidedNot ProvidedProvidedProvidedNot ProvidedProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot ProvidedNot Provided
                                                                Thread Dia. (After inserted), Unified(inch)---1/4-20 ~ #4-40----------------------------
                                                                Shape-SlottedStandard-StandardStandardSlotted--StandardStandardStandardSlottedStandardStandardStandardStandardStandardStandardStandardStandardStandardStandardSlottedStandardStandardStandardStandardStandardStandardStandardStandard
                                                                Sales UnitLow Quantity (Available beginning with 1 pc.)Box, Pkg.Box, Pkg.Low Quantity (Available beginning with 1 pc.) / Box, Pkg.Low Quantity (Available beginning with 1 pc.)Box, Pkg.Box, Pkg.Low Quantity (Available beginning with 1 pc.) / Box, Pkg.Low Quantity (Available beginning with 1 pc.) / Box, Pkg.Low Quantity (Available beginning with 1 pc.)Box, Pkg.Box, Pkg.Box, Pkg.Low Quantity (Available beginning with 1 pc.)Low Quantity (Available beginning with 1 pc.) / Box, Pkg.Low Quantity (Available beginning with 1 pc.) / Box, Pkg.Low Quantity (Available beginning with 1 pc.)Low Quantity (Available beginning with 1 pc.)-Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.Box, Pkg.
                                                                Cleaning Method--------------------------------

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