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Insert（Length L (after insertion) (D = Thread Dia. M)：0.8D）

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

Configure

Specification/Dimensions

Screw Dia. M (after insertion)(mm)
1

1.4

1.6

1.7

2

2.2

2.5

2.6

3

3.5

4

5

6

6a

7

8

9

10

M10

11

12

14

15

16

18

20

22

24

27

30

33

36

39

42
Drawing

Clear

Environmentally friendly
- RoHS Compliant (10 Substances)
Clear

Type
- Standard
- Tangless
- Self-Tapping
- Key Lock
- Tool
- Swaged
- Press Fit
Images

Clear

Characteristics/Applications
Clean Washed
Details

Clear

Material
- Steel
- Stainless Steel (SUS303/304)
- Stainless Steel (SUS316)
- Stainless Steel (SUS430F)
- Brass
- Phosphor Bronze
- Inconel X-750
- Nitrox 60
- Aluminum
- Nylon
Clear

Screw Type
- Metric (Coarse) Thread
- Metric (Fine) Thread
- Unified (Coarse) Thread
- Unified (Fine) Thread
- BSW (Coarse) Thread
Clear

Length L (after insertion) (D = Thread Dia. M)
- 1D
- 1.5D
- 2D
- 2.5D
- 3D
- 0.5D
- 0.7D
- 0.8D
- 3.5D
- 4D
Drawing

Clear

Application
- Light Metal
- Cast Iron
- Resin General
- Wood
Clear

Notch
- Not Provided
- Provided
Clear

Thread Dia. (After inserted), Unified(inch)
1"-12

1"-8

1"1/4-7

1/2

1/2"

1/2-20

1/2-13

1/4

1/4"

1/4-28

1/4-20

2

#2-56

3/4

3/4-16

3/4-10

3/8

3/8"

3/8-24

3/8-16

4

#4-48

#4-40

#5-40

5/8

5/8"

5/8-18

5/8-11

5/16

5/16"

5/16-24

5/16-18

6

#6-40

#6-32

7/8-14

7/8-9

7/16"

7/16-20

7/16-14

8

No. 8

#8-36

#8-32

9/16-18

10

No. 10

#10-32

#10-24
Clear

Shape
- Slotted
- Small O.D. Slotted Type
- 3-Hole Type
- Small O.D. 3-Hole Type
- With Pin Type
- Tip Free Type
- Standard
Images

Clear

Sales Unit
- Low Quantity (Available beginning with 1 pc.)
- Box, Pkg.
Clear

Cleaning Method
- Degreasing
- Precision Cleaning
- Electrolytic Polishing + Precision Cleaning
Clear

Brand	(0) (0) ACCURATE (0) BOHSEI (0) ESCO (0) HIROSUGI SEIKI (0) HIROSUGI-KEIKI (12) IMAO CORPORATION (0) JAPAN DRIVEIT (0) JYA (0) KKV (0) KS SANGYO (0) NIPPON SPREW (0) RECOIL (1) RS Pro (0) SEL JAPAN (0) SUNCO (0) TOKAI METAL INDUSTRY (0) TSUGAMI (0)
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Days to Ship	All Same day 3 Day(s) or Less 4 Day(s) or Less 5 Day(s) or Less 6 Day(s) or Less Others

13 items

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: 30; 60; 90

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

HIROSUGI-KEIKI

Insert nuts, also known as “screw inserts” and “fastening screws,”
are used as "fastening parts" for molded products made of plastic, resin, etc.
[Features]
· Materials: Brass (C3604BD) with cadmium content of less than 75 ppm.
· Treatment: Degreased.
· Thread diameters: M1.4/M1.6/M1.7/M2/M2.6/M3/M4/M5.
[Applications]
· For office automation equipment, light electrical equipment, communication equipment, transportation equipment parts, etc.

From: ฿ 10.35
Days to Ship: 10 Day(s)

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Stainless Steel/Insert Nut Threaded Type / IRU

Until 31/03/2025

Stainless Steel/Insert Nut Threaded Type / IRU

HIROSUGI-KEIKI

[Nominal of Thread (M)] 2/2.5/2.6/3/4/5/6/8
[Material] Free-Cutting Stainless Steel (SUS303)
[Processing] Degreasing

From: ฿ 22.40
Special Price
Days to Ship: 10 Day(s)

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2/2.5/2.6/3/4/5/6/8
[Material] Free-cutting brass (C3604BD), cadmium content less than 75 ppm
[Treatment] Nickel plating (Ni)/degreasing

From: ฿ 28.79
Days to Ship: 10 Day(s)

10 Day(s)

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

HIROSUGI-KEIKI

[Nominal Thread Sizes (M)] 2.6/3/4/5/6/8
[Materials] Free-cutting stainless steel (SUS303)
[Finish] Degreased

From: ฿ 29.52
Days to Ship: 10 Day(s)

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

HIROSUGI-KEIKI

[Nominal of Thread (M)] 2.6/3/4/5/6/8
[Material] Free-Cutting Stainless Steel (SUS303)
[Processing] Degreasing

From: ฿ 43.94
Days to Ship: 10 Day(s)

10 Day(s)

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2.6/3/4/5/6/8
[Material] Free-cutting brass (C3604BD), cadmium content less than 75 ppm
[Treatment] Nickel plating (Ni)/degreasing

From: ฿ 18.57
Days to Ship: 10 Day(s)

10 Day(s)

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

HIROSUGI-KEIKI

[Nominal Thread Sizes (M)] 2.6/3/4/5/6/8
[Materials] Free-cutting stainless steel (SUS303)
[Finish] Degreased

From: ฿ 51.52
Days to Ship: 10 Day(s)

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2.6/3/4/5/6/8
[Material] Lead-free free-cutting aluminum (KS26), lead content 300 ppm or less
[Treatment] Black anodized (BAL)/Kanigen plating

From: ฿ 39.90
Days to Ship: 10 Day(s)

10 Day(s)

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2.6/3/4/5/6/8
[Material] Free-cutting brass (C3604BD), cadmium content less than 75 ppm
[Treatment] Nickel plating (Ni)/degreasing

From: ฿ 38.83
Days to Ship: 10 Day(s)

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

HIROSUGI-KEIKI

[Nominal Thread Sizes (M)] 1.4/1.6/1.7/2/2.6/3/4/5
[Materials] Brass (C3604BD) with cadmium content less than 75 ppm
[Finish] Degreased

From: ฿ 10.90
Days to Ship: 10 Day(s)

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Until 31/03/2025

Recoil-Free, Special Size

RECOIL

Recoil, threaded insert, recoil-free special size. [Thread Type]Coarse. "Material" SUS304

From: ฿ 60.96
Special Price
Days to Ship: Same day

Same day

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2.6/3/4/5/6/8
[Material] Free-cutting brass (C3604BD), cadmium content less than 75 ppm
[Treatment] Nickel plating (Ni)/degreasing

From: ฿ 37.37
Days to Ship: 10 Day(s)

10 Day(s)

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

HIROSUGI-KEIKI

[Nominal designation of thread (M)] 2/2.5/2.6/3/4/5/6/8
[Material] Lead-free free-cutting aluminum (KS26), lead content 300 ppm or less
[Treatment] Black anodized (BAL)/Kanigen plating

From: ฿ 31.82
Days to Ship: 10 Day(s)

10 Day(s)


Brand
Product Series
From
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

	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 31/03/2025	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare Until 31/03/2025	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare
Brand	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	HIROSUGI-KEIKI	RECOIL	HIROSUGI-KEIKI	HIROSUGI-KEIKI
Product Series	Brass Bit Insert (Standard Model / Single-Sided Type) HSB	Stainless Steel/Insert Nut Threaded Type / IRU	Brass Insert Nut (Screw-In Type) IRB/IRB-C	Stainless Steel Insert Nut, Screw-in (Slotted)/IRU-S	Stainless Steel/Aluminum Insert Nut Threaded Type (Loosening Prevention) / IRU-W	Brass Insert Nut (Screw-In Type / Slotted) IRB-S/IRB-SC	Stainless Steel Insert Nut, Screw-in (Thread Locker / Slotted) / IRU-SW	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 Bit Insert (Standard, Double-sided) HSB-Z	Recoil-Free, Special Size	Brass Insert Nut (Screw-In Type) IRB-W/-CW	Aluminum Insert Nut (Screw-In Type) IRL-B/IRL-K
From	฿ 10.35	฿ 22.40 Special Price On Sale Until 31/03/2025	฿ 28.79	฿ 29.52	฿ 43.94	฿ 18.57	฿ 51.52	฿ 39.90	฿ 38.83	฿ 10.90	฿ 60.96 Special Price On Sale Until 31/03/2025	฿ 37.37	฿ 31.82
Days to Ship	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	10 Day(s)	Same day	10 Day(s)	10 Day(s)
Screw Dia. M (after insertion)(mm)	4	2.5 ～ 6	2.5 ～ 6	4 ～ 6	4 ～ 6	4 ～ 6	4 ～ 6	4 ～ 6	4 ～ 6	4	3 ～ 8	4 ～ 6	2.5 ～ 6
Environmentally friendly	-	-	-	-	-	-	-	-	-	-	-	-	-
Type	Press Fit	Self-Tapping	Self-Tapping	Self-Tapping	Self-Tapping	Self-Tapping	Self-Tapping	Self-Tapping	Self-Tapping	Press Fit	Standard	Self-Tapping	Self-Tapping
Characteristics/Applications	-	-	-	-	-	-	-	-	-	-	-	-	-
Material	Brass	Stainless Steel (SUS303/304)	Brass	Stainless Steel (SUS303/304)	Stainless Steel (SUS303/304)	Brass	Stainless Steel (SUS303/304)	Aluminum	Brass	Brass	Stainless Steel (SUS303/304)	Brass	Aluminum
Screw Type	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread	Metric (Coarse) Thread
Length L (after insertion) (D = Thread Dia. M)	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D	0.8D
Application	Light Metal	Cast Iron	Light Metal	Cast Iron	Cast Iron	Light Metal	Cast Iron	Light Metal	Light Metal	Light Metal	Light Metal	Light Metal	Light Metal
Notch	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Not Provided	Provided	Not Provided	Not Provided
Thread Dia. (After inserted), Unified(inch)	-	-	-	-	-	-	-	-	-	-	-	-	-
Shape	Standard	Standard	Standard	Slotted	Standard	Slotted	Slotted	Standard	Slotted	Standard	-	Standard	Standard
Sales Unit	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Box, Pkg.	Low Quantity (Available beginning with 1 pc.)	Box, Pkg.	Box, Pkg.
Cleaning Method	-	-	-	-	-	-	-	-	-	-	-	-	-