Mounting Hardware – Mouser Canada

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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 (CAD) 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: $0.374 187,378In 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	187,378In Stock 12,674On Order	$0.374 $0.256 $0.206 $0.193 View $0.163 $0.157 $0.153 $0.148	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M3-2 SI 1: $0.749 40,422In Stock 68,141On 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	40,422In Stock 68,141On Order On Order Ship Dates Mfr. #: IUC-M3-2 Stock: 40,422 Can Ship Immediately On Order: 6,141 Pending 62,000 Expected 2026-11-10 Factory Lead-Time: 19 Weeks	$0.749 $0.534 $0.428 $0.384 View $0.357 $0.347 $0.327 $0.32 $0.31	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Hardware HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M3-343 SI 1: $0.59 14,444In 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	14,444In Stock	$0.59 $0.419 $0.336 $0.301 View $0.279 $0.272 $0.256 $0.251 $0.242	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	3.43 mm		M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-0420 SI 1: $1.74 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	$1.74 $1.29 $1.02 $0.864 View $0.834 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: $1.17 8,486In 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	8,486In Stock	$1.17 $0.828 $0.664 $0.625 View $0.53 $0.507 $0.497 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 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M2-318 SI 1: $0.677 9,561In 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	9,561In Stock	$0.677 $0.48 $0.384 $0.346 View $0.312 $0.311 $0.294 $0.287 $0.276	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.18 mm		M2
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-632-2 SI 1: $0.95 6,783In 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	6,783In Stock	$0.95 $0.668 $0.536 $0.482 View $0.446 $0.435 $0.409 $0.40 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: $0.533 59,979In 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	59,979In Stock	$0.533 $0.379 $0.302 $0.272 View $0.253 $0.246 $0.232 $0.228 $0.219	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-632 SI 1: $1.14 8,105In Stock	Mfr. Part # IUTC-632 Mouser Part # 153-IUTC-632	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8,105In Stock	$1.14 $0.799 $0.641 $0.603 View $0.511 $0.49 $0.48 Quote	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, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M5-572 SI 1: $0.806 10,311In Stock	Mfr. Part # IUTB-M5-572 Mouser Part # 153-IUTB-M5-572	SI	Mounting Hardware HI-TORQUE INSERT, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,311In Stock	$0.806 $0.572 $0.458 $0.412 View $0.383 $0.372 $0.351 $0.343 $0.331	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	5.72 mm		M5
Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M2-318 SI 1: $0.778 9,923In 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	9,923In Stock	$0.778 $0.549 $0.439 $0.395 View $0.366 $0.356 $0.336 $0.328 $0.317	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.23 mm	3.18 mm	3.73 mm	M2
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M2.5 SI 1: $1.24 10,312In 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	10,312In Stock	$1.24 $0.878 $0.704 $0.634 View $0.588 $0.57 $0.539 $0.526 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, BRASS IUB-M5-2 SI 1: $0.922 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	$0.922 $0.652 $0.523 $0.471 View $0.436 $0.423 $0.399 $0.39 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.25 mm	9.53 mm	7.54 mm	M5
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M2.5-1 SI 1: $1.01 10,229In 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	10,229In Stock	$1.01 $0.708 $0.567 $0.511 View $0.474 $0.461 $0.433 $0.425 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, BRASS IUTB-832 SI 1: $0.533 13,080In 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	13,080In Stock	$0.533 $0.374 $0.30 $0.282 View $0.239 $0.229 $0.223 $0.216	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.223 in	0.321 in	0.243 in	8-32
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M6 SI 1: $1.90 9,053In 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	9,053In Stock	$1.90 $1.41 $1.10 $1.03 View $1.01 $0.976 $0.943 $0.909 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: $1.35 9,727In 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	9,727In Stock	$1.35 $0.953 $0.763 $0.688 View $0.638 $0.619 $0.585 $0.572 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	9.53 mm	7.92 mm	M5
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-M3 SI 1: $0.634 21,627In Stock 16,000Expected 2027-02-24	Mfr. Part # IUTFB-M3 Mouser Part # 153-IUTFB-M3	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	21,627In Stock 16,000Expected 2027-02-24	$0.634 $0.451 $0.36 $0.34 View $0.288 $0.275 $0.269 $0.261	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	5.54 mm	M3
Mounting Hardware HI-TORQUE INSERT, BRASS IUTB-M4 SI 1: $0.734 12,138In Stock	Mfr. Part # IUTB-M4 Mouser Part # 153-IUTB-M4	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	12,138In Stock	$0.734 $0.523 $0.418 $0.376 View $0.35 $0.34 $0.32 $0.314 $0.302	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	8.15 mm	6.17 mm	M4
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M3-1 SI 1: $0.691 9,492In 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	9,492In Stock	$0.691 $0.494 $0.396 $0.356 View $0.331 $0.321 $0.302 $0.297 $0.287	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M4-1 SI 1: $0.864 9,845In Stock	Mfr. Part # IUC-M4-1 Mouser Part # 153-IUC-M4-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,845In Stock	$0.864 $0.613 $0.491 $0.462 View $0.392 $0.376 $0.367 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.74 mm	4.7 mm	6.35 mm	M4
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-440-2 SI 1: $0.763 8,745In Stock	Mfr. Part # IUC-440-2 Mouser Part # 153-IUC-440-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8,745In Stock	$0.763 $0.537 $0.429 $0.405 View $0.343 $0.328 $0.321 $0.31	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.141 in	0.219 in	0.172 in	4-40
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M4 SI 1: $1.53 4,695In Stock 10,000Expected 2027-03-05	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	4,695In Stock 10,000Expected 2027-03-05	$1.53 $1.14 $0.888 $0.838 View $0.819 $0.792 $0.765 $0.737 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 IUTFB-M4 SI 1: $0.864 26,933In Stock 11,000Expected 2026-11-10	Mfr. Part # IUTFB-M4 Mouser Part # 153-IUTFB-M4	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	26,933In Stock 11,000Expected 2026-11-10	$0.864 $0.618 $0.494 $0.445 View $0.413 $0.402 $0.379 $0.37 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	8.15 mm	7.14 mm	M4
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-M3-1 SI 1: $0.317 22,694In Stock 52,000On Order	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	22,694In Stock 52,000On Order On Order Ship Dates Mfr. #: IUB-M3-1 Stock: 22,694 Can Ship Immediately On Order: 25,000 Expected 2027-02-12 27,000 Expected 2027-03-12 Factory Lead-Time: 17 Weeks	$0.317 $0.229 $0.183 $0.166 View $0.153 $0.148 $0.141 $0.137 $0.132	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.89 mm	3.43 mm	4.37 mm	M3