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Insert（Thread Dia. (After inserted), Unified：3/8-24）

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

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Search by specifying the lower class category

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CAD	2D 3D
Days to Ship	All Same day 5 Day(s) or Less 6 Day(s) or Less 7 Day(s) or Less 8 Day(s) or Less Others

4 items

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: 30; 45; 60

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Recoil Packet (UNF)【10 Pieces Per Package】

RECOIL

*Unfortunately, only lengths of 1.5D are available.

[Features]
• Recoil created by winding high quality stainless steel wire with a rhomboid cross section into a spring shape
• Insert is made one turn larger than the base material hole, and has a mild taper
• Once installed, the spring action makes it an almost permanent fixture that cannot be extracted.

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
-	-	Standard	-	Stainless Steel (SUS303/304)	Unified (Fine) Thread	1.5D	Light Metal	Provided	3/8-24	-	Box, Pkg.	-

From: ₹ 71.43
Days to Ship: 8 Day(s) or more

8 Day(s) or more

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Sprue (Unify) (UNF)【100 Pieces Per Package】

NIPPON SPREW

Screw reinforcer featuring a coiled, diamond-shaped stainless steel thread. Can achieve high-reliability tightening by effective use of the the springback.

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
-	-	Standard	-	Stainless Steel (SUS303/304)	Unified (Fine) Thread	1.5D	Light Metal	Provided	3/8-24	-	Box, Pkg.	-

From: ₹ 79.32
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Recoil-Free (UNF) SUS304

RECOIL

The material is normal stainless steel 304 (18–8), but the material has been manufactured with other materials added for special applications.

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
-	-	Standard	-	Stainless Steel (SUS303/304)	Unified (Fine) Thread	1.5D / 2D	Light Metal	Provided	3/8-24	-	Low Quantity (Available beginning with 1 pc.)	-

From: ₹ 108.84
Days to Ship: 8 Day(s) or more

8 Day(s) or more

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Stainless Steel Sprue (Unify) (UNF)

SUNCO

[Material] Stainless Steel
[Surface Processing] Bare

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
-	-	Standard	-	Stainless Steel (SUS303/304)	Unified (Fine) Thread	1D	-	Provided	3/8-24	Standard	Low Quantity (Available beginning with 1 pc.)	-

From: ₹ 207.07
Days to Ship: 5 Day(s) or more

5 Day(s) or more


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	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	RECOIL	NIPPON SPREW	RECOIL	SUNCO
Product Series	Recoil Packet (UNF)【10 Pieces Per Package】	Sprue (Unify) (UNF)【100 Pieces Per Package】	Recoil-Free (UNF) SUS304	Stainless Steel Sprue (Unify) (UNF)
From	₹ 714.25	₹ 7,932.00	₹ 108.84	₹ 207.07
Days to Ship	8 Day(s) or more	5 Day(s) or more	8 Day(s) or more	5 Day(s) or more
Screw Dia. M (after insertion)(mm)	-	-	-	-
Environmentally friendly	-	-	-	-
Type	Standard	Standard	Standard	Standard
Characteristics/Applications	-	-	-	-
Material	Stainless Steel (SUS303/304)	Stainless Steel (SUS303/304)	Stainless Steel (SUS303/304)	Stainless Steel (SUS303/304)
Screw Type	Unified (Fine) Thread	Unified (Fine) Thread	Unified (Fine) Thread	Unified (Fine) Thread
Length L (after insertion) (D = Thread Dia. M)	1.5D	1.5D	1.5D / 2D	1D
Application	Light Metal	Light Metal	Light Metal	-
Notch	Provided	Provided	Provided	Provided
Thread Dia. (After inserted), Unified(inch)	3/8-24	3/8-24	3/8-24	3/8-24
Shape	-	-	-	Standard
Sales Unit	Box, Pkg.	Box, Pkg.	Low Quantity (Available beginning with 1 pc.)	Low Quantity (Available beginning with 1 pc.)
Cleaning Method	-	-	-	-

Configure

Specification/Dimensions

Screw Dia. M (after insertion)(mm)
1.4

1.6

1.7

2

2.2

2.5

2.6

3

3.5

4

5

6

6a

7

8

9

10

11

12

14

15

16

18

20

22

24

27

30

36

39

42
Drawing

Clear

Environmentally friendly
- RoHS Compliant (10 Substances)
Clear

Type
- Standard
- Tangless
- Self-Tapping
- 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
Clear

Notch
- Not Provided
- Provided
Clear

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

1"-8

1/2

1/2"

1/2-20

1/2-13

1/4

1/4"

1/4-28

1/4-20

2

3/4-16

3/4-10

3/8

3/8"

3/8-24

3/8-16

4

#4-48

#4-40

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

#12-24
Clear