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	Packaging
Mounting Hardware HI-TORQUE INSERT IUTA-M2 SI 1: S/ 1.25 7,220In Stock	Mfr. Part # IUTA-M2 Mouser Part # 153-IUTA-M2	SI	Mounting Hardware HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7,220In Stock	S/ 1.25 S/ 0.86 S/ 0.689 S/ 0.646 View S/ 0.549 S/ 0.525 S/ 0.514 S/ 0.494	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.23 mm	4 mm	3.73 mm	M2
Mounting Hardware HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-M3-343 SI 1: S/ 1.21 10,360In Stock	Mfr. Part # IUTA-M3-343 Mouser Part # 153-IUTA-M3-343	SI	Mounting Hardware HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,360In Stock	S/ 1.21 S/ 0.833 S/ 0.666 S/ 0.627 View S/ 0.529 S/ 0.506 S/ 0.498 S/ 0.479	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	3.43 mm		M3
Mounting Hardware HI-TORQUE INSERT, BRASS IUTB-256 SI 1: S/ 1.63 252In Stock	Mfr. Part # IUTB-256 Mouser Part # 153-IUTB-256	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	252In Stock	S/ 1.63 S/ 1.18 S/ 0.938 S/ 0.845 View S/ 0.786 S/ 0.763 S/ 0.72 S/ 0.705 S/ 0.681	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.127 in	0.157 in	0.147 in	2-56
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-M2 SI 1: S/ 1.87 7,544In Stock 10,000Expected 2/12/2027	Mfr. Part # IUTFB-M2 Mouser Part # 153-IUTFB-M2	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7,544In Stock 10,000Expected 2/12/2027	S/ 1.87 S/ 1.34 S/ 1.07 S/ 0.969 View S/ 0.899 S/ 0.872 S/ 0.825 S/ 0.806 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.99 mm	4.75 mm	M2	Bulk
Mounting Hardware ULTRASONIC INSERT, ALUM IUA-M5-1 SI 1: S/ 1.32 81In Stock	Mfr. Part # IUA-M5-1 Mouser Part # 153-IUA-M5-1	SI	Mounting Hardware ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	81In Stock	S/ 1.32 S/ 0.934 S/ 0.747 S/ 0.705 View S/ 0.596 S/ 0.568 S/ 0.557 S/ 0.537	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	6.78 mm	5.72 mm	7.54 mm	M5
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-032-2 SI 1: S/ 2.41 744In Stock 10,000Expected 2/5/2027	Mfr. Part # IUB-032-2 Mouser Part # 153-IUB-032-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	744In Stock 10,000Expected 2/5/2027	S/ 2.41 S/ 1.72 S/ 1.38 S/ 1.24 View S/ 1.15 S/ 1.12 S/ 1.05 S/ 1.03 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.246 in	0.375 in	0.297 in	10-32
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUCC-M3-2 SI 1: S/ 2.41 344In Stock	Mfr. Part # IUCC-M3-2 Mouser Part # 153-IUCC-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	344In Stock	S/ 2.41 S/ 1.71 S/ 1.37 S/ 1.29 View S/ 1.09 S/ 1.05 S/ 1.03 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.7 mm	6.35 mm	5.56 mm	M3
Mounting Hardware HI-TORQUE INSERT, ALUM IUTA-256 SI 1: S/ 1.32 253In Stock	Mfr. Part # IUTA-256 Mouser Part # 153-IUTA-256	SI	Mounting Hardware HI-TORQUE INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	253In Stock	S/ 1.32 S/ 0.961 S/ 0.771 S/ 0.693 View S/ 0.642 S/ 0.627 S/ 0.588 S/ 0.576 S/ 0.557	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.127 in	0.157 in	0.147 in	2-56
Mounting Hardware HI-TORQUE INSERT, ALUM IUTA-440 SI 1: S/ 1.28 559In Stock	Mfr. Part # IUTA-440 Mouser Part # 153-IUTA-440	SI	Mounting Hardware HI-TORQUE INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	559In Stock	S/ 1.28 S/ 0.915 S/ 0.732 S/ 0.658 View S/ 0.611 S/ 0.596 S/ 0.561 S/ 0.549 S/ 0.529	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.158 in	0.226 in	0.179 in	4-40
Mounting Hardware HI-TORQUE INSERT, ALUMINUM .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-440-135 SI 1: S/ 1.28 946In Stock	Mfr. Part # IUTA-440-135 Mouser Part # 153-IUTA-440-135	SI	Mounting Hardware HI-TORQUE INSERT, ALUMINUM .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	946In Stock	S/ 1.28 S/ 0.915 S/ 0.732 S/ 0.658 View S/ 0.611 S/ 0.596 S/ 0.561 S/ 0.549 S/ 0.529	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.158 in	0.135 in		4-40
Mounting Hardware HI-TORQUE INSERT IUTA-M2.5 SI 1: S/ 1.44 7,249In Stock	Mfr. Part # IUTA-M2.5 Mouser Part # 153-IUTA-M2.5	SI	Mounting Hardware HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7,249In Stock	S/ 1.44 S/ 1.00 S/ 0.806 S/ 0.759 View S/ 0.642 S/ 0.615 S/ 0.599 S/ 0.58	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	5.74 mm	4.55 mm	M2.5
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-0518-1 SI 1: S/ 10.04 915In Stock	Mfr. Part # IUC-0518-1 Mouser Part # 153-IUC-0518-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	915In Stock	S/ 10.04 S/ 7.51 S/ 5.84 S/ 5.45 View S/ 5.37 S/ 5.18 S/ 4.98 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.431 in	0.335 in	0.469 in	5/16-18
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-0616-2 SI 1: S/ 6.77 925In Stock	Mfr. Part # IUB-0616-2 Mouser Part # 153-IUB-0616-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	925In Stock	S/ 6.77 S/ 5.06 S/ 3.97 S/ 3.71 View S/ 3.62 S/ 3.50 S/ 3.38 S/ 3.26 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.488 in	0.625 in	0.563 in	3/8-16
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-0616-1 SI 1: S/ 6.93 919In Stock	Mfr. Part # IUB-0616-1 Mouser Part # 153-IUB-0616-1	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	919In Stock	S/ 6.93 S/ 5.18 S/ 4.05 S/ 3.77 View S/ 3.69 S/ 3.57 S/ 3.44 S/ 3.32 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.523 in	0.375 in	0.563 in	3/8-16
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M8-2 SI 1: S/ 10.16 1,160In Stock	Mfr. Part # IUC-M8-2 Mouser Part # 153-IUC-M8-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,160In Stock	S/ 10.16 S/ 7.59 S/ 5.92 S/ 5.53 View S/ 5.41 S/ 5.22 S/ 5.06 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	10.19 mm	14.27 mm	11.91 mm	M8
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-024 SI 1: S/ 4.24 1,487In Stock	Mfr. Part # IUTC-024 Mouser Part # 153-IUTC-024	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,487In Stock	S/ 4.24 S/ 3.15 S/ 2.45 S/ 2.31 View S/ 2.26 S/ 2.18 S/ 2.11 S/ 2.03 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.253 in	0.375 in	0.273 in	10-24
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-0616 SI 1: S/ 6.93 1,644In Stock	Mfr. Part # IUTC-0616 Mouser Part # 153-IUTC-0616	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,644In Stock	S/ 6.93 S/ 5.18 S/ 4.05 S/ 3.79 View S/ 3.71 S/ 3.58 S/ 3.46 S/ 3.33 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.468 in	0.5 in	0.509 in	3/8-16
Mounting Hardware HI-TORQUE INSERT IUTA-M3 SI 1: S/ 1.25 14,190In Stock 17,000Expected 12/21/2026	Mfr. Part # IUTA-M3 Mouser Part # 153-IUTA-M3	SI	Mounting Hardware HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	14,190In Stock 17,000Expected 12/21/2026	S/ 1.25 S/ 0.895 S/ 0.716 S/ 0.646 View S/ 0.599 S/ 0.584 S/ 0.549 S/ 0.537 S/ 0.518	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M5-572 SI 1: S/ 3.46 9,395In Stock	Mfr. Part # IUTC-M5-572 Mouser Part # 153-IUTC-M5-572	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,395In Stock	S/ 3.46 S/ 2.57 S/ 2.02 S/ 1.72 View S/ 1.71 S/ 1.65 S/ 1.63	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.43 mm	5.72 mm	6.93 mm	M5
Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M6-762 SI 1: S/ 4.71 4,715In Stock	Mfr. Part # IUTC-M6-762 Mouser Part # 153-IUTC-M6-762	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	4,715In 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	8.03 mm	7.62 mm	8.69 mm	M6
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-M6 SI 1: S/ 3.08 5,803In Stock 16,427On Order	Mfr. Part # IUTFB-M6 Mouser Part # 153-IUTFB-M6	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	5,803In Stock 16,427On Order On Order Ship Dates Mfr. #: IUTFB-M6 Stock: 5,803 Can Ship Immediately On Order: 4,927 Pending 11,500 Expected 2/12/2027 Factory Lead-Time: 19 Weeks	S/ 3.08 S/ 2.29 S/ 1.88 S/ 1.60 View S/ 1.58 S/ 1.53 S/ 1.48 S/ 1.45	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.03 mm	12.7 mm	9.53 mm	M6	Bulk
Mounting Hardware ISB-M5 DBL ENDED NUT ISB-M5 SI 1: S/ 3.15 1,130In Stock	Mfr. Part # ISB-M5 Mouser Part # 153-ISB-M5	SI	Mounting Hardware ISB-M5 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,130In Stock	S/ 3.15 S/ 2.35 S/ 1.83 S/ 1.72 View S/ 1.69 S/ 1.63 S/ 1.58 S/ 1.52 S/ 1.49	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	6.4 mm	9.52 mm	7.01 mm	M5
Mounting Hardware HI-TORQUE INSERT, ALUMINUM .225X.247 10-24 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-024-225 SI 1: S/ 2.10 1,000In Stock	Mfr. Part # IUTA-024-225 Mouser Part # 153-IUTA-024-225	SI	Mounting Hardware HI-TORQUE INSERT, ALUMINUM .225X.247 10-24 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,000In Stock	S/ 2.10 S/ 1.49 S/ 1.19 S/ 1.07 View S/ 0.996 S/ 0.969 S/ 0.915 S/ 0.895 S/ 0.864	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.253 in	0.225 in	0.237 in	10-24
Mounting Hardware ISA-M4 DBL ENDED NUT ISA-M4 SI 1: S/ 1.71 400In Stock	Mfr. Part # ISA-M4 Mouser Part # 153-ISA-M4	SI	Mounting Hardware ISA-M4 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	400In Stock	S/ 1.71 S/ 1.21 S/ 0.973 S/ 0.876 View S/ 0.814 S/ 0.79 S/ 0.743 S/ 0.728 S/ 0.705	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Aluminum	5.62 mm	8.15 mm	6.22 mm	M4
Mounting Hardware ISB-0420 DBL ENDED NUT ISB-0420 SI 1: S/ 3.54 776In Stock	Mfr. Part # ISB-0420 Mouser Part # 153-ISB-0420	SI	Mounting Hardware ISB-0420 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	776In Stock	S/ 3.54 S/ 2.51 S/ 2.01 S/ 1.81 View S/ 1.68 S/ 1.64 S/ 1.54 S/ 1.51 Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	0.315 in	0.5 in	0.338 in	1/4-20