Mounting Hardware – Mouser Ecuador

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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 (USD) 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 ULTRASONIC INSERT, BRASS IUB-M3-2 SI 1: $0.26 188,942In 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	188,942In Stock 12,674On Order On Order Ship Dates Mfr. #: IUB-M3-2 Stock: 188,942 Can Ship Immediately On Order: 8,041 Pending 4,633 Expected 10/16/2026 Factory Lead-Time: 24 Weeks	$0.26 $0.178 $0.143 $0.134 View $0.113 $0.109 $0.106 $0.103	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-M4 SI 1: $1.06 6,585In Stock	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	6,585In Stock	$1.06 $0.793 $0.617 $0.582 View $0.569 $0.55 $0.531 $0.512 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.67 mm	8.15 mm	6.17 mm	M4
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-632-2 SI 1: $0.66 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	$0.66 $0.464 $0.372 $0.335 View $0.31 $0.302 $0.284 $0.278 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: $0.37 62,388In 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	62,388In Stock	$0.37 $0.263 $0.21 $0.189 View $0.176 $0.171 $0.161 $0.158 $0.152	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: $0.79 8,305In 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	8,305In Stock	$0.79 $0.555 $0.445 $0.419 View $0.355 $0.34 $0.333 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 IUTB-832 SI 1: $0.37 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	$0.37 $0.26 $0.208 $0.196 View $0.166 $0.159 $0.155 $0.15	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 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M3-343 SI 1: $0.41 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	$0.41 $0.291 $0.233 $0.209 View $0.194 $0.189 $0.178 $0.174 $0.168	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: $1.21 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	$1.21 $0.898 $0.707 $0.60 View $0.579 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: $0.81 8,756In 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	8,756In Stock	$0.81 $0.575 $0.461 $0.434 View $0.368 $0.352 $0.345 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	3.43 mm	4.55 mm	M3
Mounting Hardware ULTRASONIC,INSERT,STAINLESS IUCC-M5-2 SI 1: $1.00 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	$1.00 $0.743 $0.579 $0.545 View $0.533 $0.515 $0.497 $0.479 $0.472	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: $0.54 10,451In 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	10,451In Stock	$0.54 $0.381 $0.305 $0.274 View $0.254 $0.247 $0.233 $0.228 $0.22	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.23 mm	3.18 mm	3.73 mm	M2
Mounting Hardware HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M2-318 SI 1: $0.47 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	$0.47 $0.333 $0.267 $0.24 View $0.217 $0.216 $0.204 $0.199 $0.192	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: $0.86 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	$0.86 $0.61 $0.489 $0.44 View $0.408 $0.396 $0.374 $0.365 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: $0.64 9,660In 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	9,660In Stock	$0.64 $0.453 $0.363 $0.327 View $0.303 $0.294 $0.277 $0.271 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: $0.70 10,294In 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	10,294In Stock	$0.70 $0.492 $0.394 $0.355 View $0.329 $0.32 $0.301 $0.295 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: $1.32 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	$1.32 $0.978 $0.762 $0.718 View $0.701 $0.678 $0.655 $0.631 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: $0.94 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	$0.94 $0.662 $0.53 $0.478 View $0.443 $0.43 $0.406 $0.397 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-M4 SI 1: $0.60 29,191In Stock 11,000Expected 1/4/2027	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	29,191In Stock 11,000Expected 1/4/2027	$0.60 $0.429 $0.343 $0.309 View $0.287 $0.279 $0.263 $0.257 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	8.15 mm	7.14 mm	M4
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M3-2 SI 1: $0.52 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	$0.52 $0.371 $0.297 $0.267 View $0.248 $0.241 $0.227 $0.222 $0.215	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Hardware HI-TORQUE INSERT IUTA-M3 SI 1: $0.32 14,310In 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	14,310In Stock 17,000Expected 12/21/2026	$0.32 $0.23 $0.184 $0.166 View $0.154 $0.15 $0.141 $0.138 $0.133	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-M3 SI 1: $0.85 37,527In 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	37,527In Stock	$0.85 $0.606 $0.485 $0.437 View $0.405 $0.394 $0.372 $0.364 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: $1.10 4,056In 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	4,056In Stock 10,000Expected 11/17/2026	$1.10 $0.827 $0.644 $0.607 View $0.594 $0.574 $0.554 $0.534 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: $0.93 7,101In 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	7,101In Stock	$0.93 $0.695 $0.541 $0.51 View $0.499 $0.482 $0.465 $0.449 $0.442	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.43 mm	9.52 mm	6.93 mm	M5
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-M2 SI 1: $0.48 8,694In 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	8,694In Stock 10,000Expected 2/12/2027	$0.48 $0.345 $0.276 $0.249 View $0.231 $0.224 $0.212 $0.207 $0.20	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.99 mm	4.75 mm	M2	Bulk
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-M3-1 SI 1: $0.22 25,894In 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	25,894In Stock 25,000Expected 2/12/2027	$0.22 $0.159 $0.127 $0.115 View $0.106 $0.103 $0.098 $0.095 $0.092	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.89 mm	3.43 mm	4.37 mm	M3