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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Type	Material	Mounting Hole Size	Length	Outside Diameter	Thread Size
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-M3-2 SI 1: S/ 1.01 188,808In Stock 12,674On Order	Mfr. Part # IUB-M3-2 Mouser Part # 153-IUB-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	188,808In Stock 12,674On Order	S/ 1.01 S/ 0.693 S/ 0.557 S/ 0.522 View S/ 0.44 S/ 0.424 S/ 0.413 S/ 0.401	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-0420 SI 1: S/ 4.71 3,764In Stock	Mfr. Part # IUTC-0420 Mouser Part # 153-IUTC-0420	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	3,764In Stock	S/ 4.71 S/ 3.50 S/ 2.75 S/ 2.34 View S/ 2.25 Quote	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 8,586In Stock	Mfr. Part # IUTC-M3-343 Mouser Part # 153-IUTC-M3-343	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8,586In Stock	S/ 3.15 S/ 2.24 S/ 1.79 S/ 1.69 View S/ 1.43 S/ 1.37 S/ 1.34 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	3.43 mm	4.55 mm	M3
Mounting Hardware HI-TORQUE INSERT, BRASS IUTB-832 SI 1: S/ 1.44 13,090In Stock	Mfr. Part # IUTB-832 Mouser Part # 153-IUTB-832	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	13,090In Stock	S/ 1.44 S/ 1.01 S/ 0.81 S/ 0.763 View S/ 0.646 S/ 0.619 S/ 0.603 S/ 0.584	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.223 in	0.321 in	0.243 in	8-32
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-632-2 SI 1: S/ 2.57 6,883In Stock	Mfr. Part # IUC-632-2 Mouser Part # 153-IUC-632-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6,883In Stock	S/ 2.57 S/ 1.81 S/ 1.45 S/ 1.30 View S/ 1.21 S/ 1.18 S/ 1.11 S/ 1.08 Quote	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-M3 SI 1: S/ 1.44 60,441In Stock	Mfr. Part # IUTB-M3 Mouser Part # 153-IUTB-M3	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	60,441In Stock	S/ 1.44 S/ 1.02 S/ 0.817 S/ 0.736 View S/ 0.685 S/ 0.666 S/ 0.627 S/ 0.615 S/ 0.592	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M4 SI 1: S/ 4.13 6,535In Stock 10,000Expected 11/2/2026	Mfr. Part # IUTC-M4 Mouser Part # 153-IUTC-M4	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6,535In Stock 10,000Expected 11/2/2026	S/ 4.13 S/ 3.09 S/ 2.40 S/ 2.27 View S/ 2.21 S/ 2.14 S/ 2.07 S/ 1.99 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.67 mm	8.15 mm	6.17 mm	M4
Mounting Hardware HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M3-343 SI 1: S/ 1.60 15,214In Stock	Mfr. Part # IUTB-M3-343 Mouser Part # 153-IUTB-M3-343	SI	Mounting Hardware HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	15,214In Stock	S/ 1.60 S/ 1.13 S/ 0.907 S/ 0.814 View S/ 0.755 S/ 0.736 S/ 0.693 S/ 0.677 S/ 0.654	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	3.43 mm		M3
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M2.5-1 SI 1: S/ 2.72 10,254In Stock	Mfr. Part # IUC-M2.5-1 Mouser Part # 153-IUC-M2.5-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,254In Stock	S/ 2.72 S/ 1.92 S/ 1.53 S/ 1.38 View S/ 1.28 S/ 1.25 S/ 1.17 S/ 1.15 Quote	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 9,083In Stock	Mfr. Part # IUTC-M6 Mouser Part # 153-IUTC-M6	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,083In Stock	S/ 5.14 S/ 3.81 S/ 2.97 S/ 2.79 View S/ 2.73 S/ 2.64 S/ 2.55 S/ 2.46 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.03 mm	12.7 mm	8.69 mm	M6
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-M5 SI 1: S/ 3.66 9,769In Stock	Mfr. Part # IUTFB-M5 Mouser Part # 153-IUTFB-M5	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,769In Stock	S/ 3.66 S/ 2.58 S/ 2.06 S/ 1.86 View S/ 1.72 S/ 1.67 S/ 1.58 S/ 1.55 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	9.53 mm	7.92 mm	M5
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	SI	Mounting Hardware ULTRASONIC,INSERT,STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,496In Stock	S/ 3.89 S/ 2.89 S/ 2.25 S/ 2.12 View S/ 2.07 S/ 2.00 S/ 1.93 S/ 1.86 S/ 1.84	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	7.06 mm	11.1 mm	8.33 mm	M5
Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M2-318 SI 1: S/ 2.10 9,951In Stock	Mfr. Part # IUTC-M2-318 Mouser Part # 153-IUTC-M2-318	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,951In Stock	S/ 2.10 S/ 1.48 S/ 1.19 S/ 1.07 View S/ 0.989 S/ 0.961 S/ 0.907 S/ 0.887 S/ 0.856	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.23 mm	3.18 mm	3.73 mm	M2
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-M5-2 SI 1: S/ 2.49 9,560In Stock	Mfr. Part # IUB-M5-2 Mouser Part # 153-IUB-M5-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,560In Stock	S/ 2.49 S/ 1.76 S/ 1.41 S/ 1.27 View S/ 1.18 S/ 1.14 S/ 1.08 S/ 1.05 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.25 mm	9.53 mm	7.54 mm	M5
Mounting Hardware HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M2-318 SI 1: S/ 1.83 11,055In Stock	Mfr. Part # IUTB-M2-318 Mouser Part # 153-IUTB-M2-318	SI	Mounting Hardware HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	11,055In Stock	S/ 1.83 S/ 1.30 S/ 1.04 S/ 0.934 View S/ 0.845 S/ 0.841 S/ 0.794 S/ 0.775 S/ 0.747	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.18 mm		M2
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M2.5 SI 1: S/ 3.35 10,828In Stock	Mfr. Part # IUTC-M2.5 Mouser Part # 153-IUTC-M2.5	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,828In Stock	S/ 3.35 S/ 2.37 S/ 1.90 S/ 1.71 View S/ 1.59 S/ 1.54 S/ 1.46 S/ 1.42 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	5.74 mm	4.55 mm	M2.5
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M3-1 SI 1: S/ 1.87 9,642In Stock	Mfr. Part # IUC-M3-1 Mouser Part # 153-IUC-M3-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,642In Stock	S/ 1.87 S/ 1.34 S/ 1.07 S/ 0.961 View S/ 0.895 S/ 0.868 S/ 0.817 S/ 0.802 S/ 0.775	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-M3-1 SI 1: S/ 0.856 24,894In Stock 25,000Expected 2/12/2027	Mfr. Part # IUB-M3-1 Mouser Part # 153-IUB-M3-1	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	24,894In Stock 25,000Expected 2/12/2027	S/ 0.856 S/ 0.619 S/ 0.494 S/ 0.448 View S/ 0.413 S/ 0.401 S/ 0.381 S/ 0.37 S/ 0.358	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Hardware HI-TORQUE INSERT, BRASS IUTB-M2 SI 1: S/ 1.79 15,912In Stock	Mfr. Part # IUTB-M2 Mouser Part # 153-IUTB-M2	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	15,912In Stock	S/ 1.79 S/ 1.29 S/ 1.04 S/ 0.93 View S/ 0.864 S/ 0.841 S/ 0.794 S/ 0.775 S/ 0.747	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	4 mm	3.73 mm	M2
Mounting Hardware HI-TORQUE INSERT, BRASS 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M4-470 SI 1: S/ 1.91 9,898In Stock	Mfr. Part # IUTB-M4-470 Mouser Part # 153-IUTB-M4-470	SI	Mounting Hardware HI-TORQUE INSERT, BRASS 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,898In Stock	S/ 1.91 S/ 1.33 S/ 1.07 S/ 1.00 View S/ 0.849 S/ 0.814 S/ 0.794 S/ 0.767	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	4.7 mm		M4
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M6-2 SI 1: S/ 5.53 9,362In Stock	Mfr. Part # IUC-M6-2 Mouser Part # 153-IUC-M6-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,362In Stock	S/ 5.53 S/ 4.13 S/ 3.20 S/ 3.01 View S/ 2.94 S/ 2.85 S/ 2.75 S/ 2.65 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.15 mm	12.7 mm	9.52 mm	M6
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M3 SI 1: S/ 3.31 37,097In Stock	Mfr. Part # IUTC-M3 Mouser Part # 153-IUTC-M3	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	37,097In Stock	S/ 3.31 S/ 2.36 S/ 1.89 S/ 1.70 View S/ 1.58 S/ 1.53 S/ 1.45 S/ 1.42 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M4-470 SI 1: S/ 4.28 3,711In Stock 10,000Expected 11/17/2026	Mfr. Part # IUTC-M4-470 Mouser Part # 153-IUTC-M4-470	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	3,711In Stock 10,000Expected 11/17/2026	S/ 4.28 S/ 3.22 S/ 2.51 S/ 2.36 View S/ 2.31 S/ 2.23 S/ 2.16 S/ 2.08 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.67 mm	4.7 mm	6.17 mm	M4
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M5 SI 1: S/ 3.62 6,901In Stock	Mfr. Part # IUTC-M5 Mouser Part # 153-IUTC-M5	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6,901In Stock	S/ 3.62 S/ 2.71 S/ 2.11 S/ 1.99 View S/ 1.94 S/ 1.88 S/ 1.81 S/ 1.75 S/ 1.72	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.43 mm	9.52 mm	6.93 mm	M5
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M3-2 SI 1: S/ 2.02 10,472In Stock 98,141On Order	Mfr. Part # IUC-M3-2 Mouser Part # 153-IUC-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,472In Stock 98,141On Order On Order Ship Dates Mfr. #: IUC-M3-2 Stock: 10,472 Can Ship Immediately On Order: 36,141 Pending 62,000 Expected 11/20/2026 Factory Lead-Time: 19 Weeks	S/ 2.02 S/ 1.44 S/ 1.16 S/ 1.04 View S/ 0.965 S/ 0.938 S/ 0.884 S/ 0.864 S/ 0.837	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M3