Mounting Hardware – Mouser Peru

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Ultrasonic/Heat Staking Inserts

SI (Standard Inserts) Ultrasonic/Heat Staking Inserts are hexagonal-shaped body inserts that provide rotational torque resistance and knurling provides torque out resistance. The heat staking inserts are installed by pressing the insert into the mounting hole with a thermal press to melt the plastic surrounding the insert. The SI^® brand inserts employ press-in and heat/ultrasonic installation methods to provide strong, reusable, and permanent threads in plastic. These SI^® inserts are available in brass, stainless steel, and aluminum. The applications include wearables, smartphones, handheld devices, automotive, aerospace and defense, medical, transportation, industrial, and recreational equipment.

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Part #

Mounting Hardware ULTRASONIC INSERT, BRASS

IUB-M3-1
SI
1: S/0.856
36,708In Stock

Mfr. Part #
IUB-M3-1

Mouser Part #
153-IUB-M3-1

Mounting Hardware ULTRASONIC INSERT, BRASS

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Datasheet

36,708In Stock

S/0.856

S/0.619

S/0.494

S/0.448

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

3.89 mm

3.43 mm

4.37 mm

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTB-832
SI
1: S/1.44
14,287In Stock

Mfr. Part #
IUTB-832

Mouser Part #
153-IUTB-832

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

14,287In Stock

S/1.44

S/1.01

S/0.81

S/0.763

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

0.223 in

0.321 in

0.243 in

8-32

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTB-M6
SI
1: S/3.15
7,692In Stock

Mfr. Part #
IUTB-M6

Mouser Part #
153-IUTB-M6

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

7,692In Stock

S/3.15

S/2.24

S/1.79

S/1.69

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

8.03 mm

12.7 mm

8.69 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-0420
SI
1: S/4.71
4,776In Stock

Mfr. Part #
IUTC-0420

Mouser Part #
153-IUTC-0420

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

4,776In Stock

S/4.71

S/3.50

S/2.75

S/2.34

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

0.316 in

0.5 in

0.342 in

1/4-20

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL

IUTC-M3-343
SI
1: S/3.15
9,480In Stock

Mfr. Part #
IUTC-M3-343

Mouser Part #
153-IUTC-M3-343

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL

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Datasheet

9,480In Stock

S/3.15

S/2.24

S/1.79

S/1.69

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

4.01 mm

3.43 mm

4.55 mm

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTB-M3
SI
1: S/1.44
72,169In Stock

Mfr. Part #
IUTB-M3

Mouser Part #
153-IUTB-M3

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

72,169In Stock

S/1.44

S/1.02

S/0.817

S/0.736

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

4.01 mm

5.74 mm

4.55 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M4
SI
1: S/4.13
9,905In Stock

Mfr. Part #
IUTC-M4

Mouser Part #
153-IUTC-M4

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

9,905In Stock

S/4.13

S/3.09

S/2.40

S/2.27

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

5.67 mm

8.15 mm

6.17 mm

Mounting Hardware ULTRASONIC,INSERT,STAINLESS

IUCC-M5-2
SI
1: S/3.89
9,496In Stock

Mfr. Part #
IUCC-M5-2

Mouser Part #
153-IUCC-M5-2

Mounting Hardware ULTRASONIC,INSERT,STAINLESS

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Datasheet

9,496In Stock

S/3.89

S/2.89

S/2.25

S/2.12

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

7.06 mm

11.1 mm

8.33 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-632
SI
1: S/3.08
9,805In Stock

Mfr. Part #
IUTC-632

Mouser Part #
153-IUTC-632

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

9,805In Stock

S/3.08

S/2.16

S/1.73

S/1.56

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

0.189 in

0.281 in

0.21 in

6-32

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL

IUTC-M2-318
SI
1: S/2.10
10,551In Stock

Mfr. Part #
IUTC-M2-318

Mouser Part #
153-IUTC-M2-318

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL

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Datasheet

10,551In Stock

S/2.10

S/1.48

S/1.19

S/1.07

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

3.23 mm

3.18 mm

3.73 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M2
SI
1: S/1.91
8,649In Stock

Mfr. Part #
IUTC-M2

Mouser Part #
153-IUTC-M2

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

8,649In Stock

S/1.91

S/1.35

S/1.08

S/1.02

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

3.23 mm

4 mm

3.73 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M3
SI
1: S/3.31
40,861In Stock

Mfr. Part #
IUTC-M3

Mouser Part #
153-IUTC-M3

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

40,861In Stock

S/3.31

S/2.36

S/1.89

S/1.70

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

4.01 mm

5.74 mm

4.55 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL

IUTC-M4-470
SI
1: S/4.28
6,068In Stock
10,000Expected 11/17/2026

Mfr. Part #
IUTC-M4-470

Mouser Part #
153-IUTC-M4-470

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL

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Datasheet

6,068In Stock

10,000Expected 11/17/2026

S/4.28

S/3.22

S/2.51

S/2.36

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

5.67 mm

4.7 mm

6.17 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M5
SI
1: S/3.62
8,470In Stock

Mfr. Part #
IUTC-M5

Mouser Part #
153-IUTC-M5

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

8,470In Stock

S/3.62

S/2.71

S/2.11

S/1.99

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

6.43 mm

9.52 mm

6.93 mm

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTFB-M2
SI
1: S/1.87
9,792In Stock
15On Order

Mfr. Part #
IUTFB-M2

Mouser Part #
153-IUTFB-M2

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

9,792In Stock

15On Order

S/1.87

S/1.34

S/1.07

S/0.969

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

3.23 mm

3.99 mm

4.75 mm

Bulk

Mounting Hardware ULTRASONIC INSERT, STAINLESS

IUC-632-2
SI
1: S/2.57
10,228In Stock

Mfr. Part #
IUC-632-2

Mouser Part #
153-IUC-632-2

Mounting Hardware ULTRASONIC INSERT, STAINLESS

Learn More

Datasheet

10,228In Stock

S/2.57

S/1.81

S/1.45

S/1.30

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

0.185 in

0.25 in

0.219 in

6-32

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTB-M2
SI
1: S/1.79
20,497In Stock

Mfr. Part #
IUTB-M2

Mouser Part #
153-IUTB-M2

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

20,497In Stock

S/1.79

S/1.29

S/1.04

S/0.93

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

3.23 mm

4 mm

3.73 mm

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTFB-M2.5
SI
1: S/2.18
8,603In Stock

Mfr. Part #
IUTFB-M2.5

Mouser Part #
153-IUTFB-M2.5

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

8,603In Stock

S/2.18

S/1.57

S/1.25

S/1.13

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

4.01 mm

5.74 mm

5.54 mm

M2.5

Bulk

Mounting Hardware ULTRASONIC INSERT, STAINLESS

IUC-M2.5-1
SI
1: S/2.72
10,544In Stock

Mfr. Part #
IUC-M2.5-1

Mouser Part #
153-IUC-M2.5-1

Mounting Hardware ULTRASONIC INSERT, STAINLESS

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Datasheet

10,544In Stock

S/2.72

S/1.92

S/1.53

S/1.38

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

3.89 mm

3.43 mm

4.37 mm

M2.5

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M6
SI
1: S/5.14
9,243In Stock

Mfr. Part #
IUTC-M6

Mouser Part #
153-IUTC-M6

Mounting Hardware HI-TORQUE INSERT, STAINLESS

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Datasheet

9,243In Stock

S/5.14

S/3.81

S/2.97

S/2.79

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

8.03 mm

12.7 mm

8.69 mm

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTFB-M5
SI
1: S/3.66
9,934In Stock

Mfr. Part #
IUTFB-M5

Mouser Part #
153-IUTFB-M5

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

9,934In Stock

S/3.66

S/2.58

S/2.06

S/1.86

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

6.43 mm

9.53 mm

7.92 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS

IUTC-M2.5
SI
1: S/3.35
11,141In Stock

Mfr. Part #
IUTC-M2.5

Mouser Part #
153-IUTC-M2.5

Mounting Hardware HI-TORQUE INSERT, STAINLESS

Learn More

Datasheet

11,141In Stock

S/3.35

S/2.37

S/1.90

S/1.71

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

4.01 mm

5.74 mm

4.55 mm

M2.5

Mounting Hardware HI-TORQUE INSERT, BRASS

IUTFB-M4
SI
1: S/2.34
11,261In Stock
31,000On Order

Mfr. Part #
IUTFB-M4

Mouser Part #
153-IUTFB-M4

Mounting Hardware HI-TORQUE INSERT, BRASS

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Datasheet

11,261In Stock

31,000On Order

S/2.34

S/1.67

S/1.34

S/1.20

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Brass

5.67 mm

8.15 mm

7.14 mm

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL

IUTC-M8
SI
1: S/5.14
10,201In Stock

Mfr. Part #
IUTC-M8

Mouser Part #
153-IUTC-M8

Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL

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Datasheet

10,201In Stock

S/5.14

S/3.81

S/3.14

S/2.67

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

9.6 mm

12.7 mm

10.31 mm

Mounting Hardware ULTRASONIC INSERT, STAINLESS

IUC-M6-1
SI
1: S/4.13
1,900In Stock

Mfr. Part #
IUC-M6-1

Mouser Part #
153-IUC-M6-1

Mounting Hardware ULTRASONIC INSERT, STAINLESS

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Datasheet

1,900In Stock

S/4.13

S/3.09

S/2.41

S/2.27

View

Min.: 1
Mult.: 1

Inserts

Threaded Insert

Stainless Steel

8.86 mm

7.62 mm

9.52 mm

Ultrasonic/Heat Staking Inserts

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0.107 in
0.118 in
3 mm
0.126 in
0.127 in
3.23 mm
3.58 mm
0.141 in
3.89 mm
0.153 in
3.99 mm
0.157 in
0.158 in
4.01 mm
0.185 in
4.7 mm
0.188 in
0.189 in
4.81 mm
5.05 mm

0.115 in
2.92 mm
3.18 mm
0.125 in
0.135 in
3.43 mm
0.15 in
3.81 mm
3.99 mm
0.157 in
4 mm
0.185 in
4.7 mm
0.188 in
5.56 mm
0.219 in
0.225 in
0.226 in
5.72 mm
5.74 mm

0.141 in
0.147 in
3.73 mm
0.151 in
4.37 mm
0.172 in
0.179 in
4.55 mm
0.182 in
4.62 mm
0.187 in
4.75 mm
0.21 in
5.33 mm
0.215 in
0.218 in
5.54 mm
5.56 mm
0.219 in
0.237 in

0-80
1/4-20
1/4-28
10-24
10-32
2-56
3/8-16
3/8-24
4-40
5/16-18
5/16-24
6-32
8-32
M10
M2
M2.5
M3
M3.5
M4
M5