Mounting Fixings – Mouser Estonia

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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 (EUR) 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 Fixings HI-TORQUE INSERT, BRASS IUTFB-M3.5 SI 1: 0,49 € 337In Stock	Mfr. Part No. IUTFB-M3.5 Mouser Part No 153-IUTFB-M3.5	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	337In Stock	0,49 € 0,353 € 0,282 € 0,254 € View 0,236 € 0,23 € 0,216 € 0,212 € 0,205 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.81 mm	7.14 mm	6.35 mm	M3.5	Bulk
Mounting Fixings ISB-M4 DBL ENDED NUT ISB-M4 SI 1: 0,585 € 363In Stock	Mfr. Part No. ISB-M4 Mouser Part No 153-ISB-M4	SI	Mounting Fixings ISB-M4 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	363In Stock	0,585 € 0,421 € 0,336 € 0,303 € View 0,281 € 0,273 € 0,258 € 0,252 € Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	5.62 mm	8.15 mm	6.22 mm	M4
Mounting Fixings ULTRASONIC INSERT, ALUM IUA-M5-2 SI 1: 0,31 € 1.121In Stock	Mfr. Part No. IUA-M5-2 Mouser Part No 153-IUA-M5-2	SI	Mounting Fixings ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.121In Stock	0,31 € 0,216 € 0,173 € 0,163 € View 0,138 € 0,132 € 0,129 € 0,125 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	6.25 mm	9.53 mm	7.54 mm	M5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M3.5-2 SI 1: 0,249 € 1.130In Stock	Mfr. Part No. IUB-M3.5-2 Mouser Part No 153-IUB-M3.5-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.130In Stock	0,249 € 0,175 € 0,14 € 0,132 € View 0,112 € 0,107 € 0,105 € 0,101 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.7 mm	6.35 mm	5.56 mm	M3.5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M6-2 SI 1: 0,86 € 755In Stock	Mfr. Part No. IUB-M6-2 Mouser Part No 153-IUB-M6-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	755In Stock	0,86 € 0,642 € 0,529 € 0,449 € View 0,445 € 0,43 € 0,415 € 0,409 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.15 mm	12.7 mm	9.52 mm	M6
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-032-2 SI 1: 0,765 € 525In Stock	Mfr. Part No. IUC-032-2 Mouser Part No 153-IUC-032-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	525In Stock	0,765 € 0,572 € 0,445 € 0,42 € View 0,411 € 0,397 € 0,384 € 0,37 € 0,364 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.246 in	0.375 in	0.297 in	10-32
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-832-1 SI 1: 0,542 € 9In Stock	Mfr. Part No. IUC-832-1 Mouser Part No 153-IUC-832-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9In Stock	0,542 € 0,385 € 0,309 € 0,278 € View 0,258 € 0,251 € 0,237 € 0,231 € 0,224 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.226 in	0.185 in	0.25 in	8-32
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M2.5-2 SI 1: 0,611 € 1.149In Stock	Mfr. Part No. IUC-M2.5-2 Mouser Part No 153-IUC-M2.5-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.149In Stock	0,611 € 0,433 € 0,347 € 0,327 € View 0,277 € 0,266 € 0,26 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M2.5
Mounting Fixings HI-TORQUE INSERT, BRASS 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M4-470 SI 1: 0,421 € 6.246In Stock	Mfr. Part No. IUTB-M4-470 Mouser Part No 153-IUTB-M4-470	SI	Mounting Fixings HI-TORQUE INSERT, BRASS 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6.246In Stock	0,421 € 0,294 € 0,236 € 0,222 € View 0,187 € 0,18 € 0,175 € 0,169 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	4.7 mm		M4
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-632-1 SI 1: 0,206 € 98In Stock 10.000On Order	Mfr. Part No. IUB-632-1 Mouser Part No 153-IUB-632-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	98In Stock 10.000On Order	0,206 € 0,143 € 0,114 € 0,108 € View 0,091 € 0,087 € 0,085 € 0,083 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.199 in	0.15 in	0.219 in	6-32
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-024-1 SI 1: 0,74 € 380In Stock	Mfr. Part No. IUC-024-1 Mouser Part No 153-IUC-024-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	380In Stock	0,74 € 0,55 € 0,433 € 0,367 € View 0,354 € 0,349 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.267 in	0.225 in	0.297 in	10-24
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-256-1 SI 1: 0,413 € 5.924In Stock	Mfr. Part No. IUC-256-1 Mouser Part No 153-IUC-256-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	5.924In Stock	0,413 € 0,292 € 0,234 € 0,211 € View 0,196 € 0,19 € 0,18 € 0,175 € 0,169 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.118 in	0.115 in	0.141 in	2-56
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-M6 SI 1: 0,697 € 841In Stock 10.000Expected 2/8/2027	Mfr. Part No. IUTB-M6 Mouser Part No 153-IUTB-M6	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	841In Stock 10.000Expected 2/8/2027	0,697 € 0,495 € 0,396 € 0,373 € View 0,316 € 0,303 € 0,297 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.03 mm	12.7 mm	8.69 mm	M6
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-632-150 SI 1: 0,705 € 230In Stock	Mfr. Part No. IUTC-632-150 Mouser Part No 153-IUTC-632-150	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	230In Stock	0,705 € 0,507 € 0,405 € 0,365 € View 0,339 € 0,329 € 0,31 € 0,304 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.189 in	0.15 in	0.21 in	6-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-M2.5 SI 1: 0,482 € 6.496In Stock	Mfr. Part No. IUTFB-M2.5 Mouser Part No 153-IUTFB-M2.5	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6.496In Stock	0,482 € 0,347 € 0,277 € 0,249 € View 0,231 € 0,225 € 0,212 € 0,208 € 0,20 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	5.54 mm	M2.5	Bulk
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M2.5-1 SI 1: 0,249 € 3.890In Stock 28.000Expected 11/10/2026	Mfr. Part No. IUB-M2.5-1 Mouser Part No 153-IUB-M2.5-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	3.890In Stock 28.000Expected 11/10/2026	0,249 € 0,182 € 0,146 € 0,132 € View 0,122 € 0,119 € 0,112 € 0,109 € 0,106 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.89 mm	3.43 mm	4.37 mm	M2.5
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-256-2 SI 1: 0,611 € 798In Stock	Mfr. Part No. IUC-256-2 Mouser Part No 153-IUC-256-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	798In Stock	0,611 € 0,437 € 0,349 € 0,315 € View 0,292 € 0,284 € 0,267 € 0,262 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.107 in	0.188 in	0.141 in	2-56
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-0420 SI 1: 0,697 € 303In Stock	Mfr. Part No. IUTB-0420 Mouser Part No 153-IUTB-0420	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	303In Stock	0,697 € 0,495 € 0,406 € 0,344 € View 0,33 € 0,322 € 0,303 € 0,297 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.316 in	0.5 in	0.342 in	1/4-20
Mounting Fixings HI-TORQUE INSERT, BRASS .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-0420-300 SI 1: 0,765 € 14In Stock	Mfr. Part No. IUTB-0420-300 Mouser Part No 153-IUTB-0420-300	SI	Mounting Fixings HI-TORQUE INSERT, BRASS .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	14In Stock	0,765 € 0,549 € 0,439 € 0,395 € View 0,367 € 0,357 € 0,336 € 0,329 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.316 in	0.3 in	0.342 in	1/4-20
Mounting Fixings HI-TORQUE INSERT, BRASS 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M6-762 SI 1: 0,697 € 119In Stock	Mfr. Part No. IUTB-M6-762 Mouser Part No 153-IUTB-M6-762	SI	Mounting Fixings HI-TORQUE INSERT, BRASS 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	119In Stock	0,697 € 0,495 € 0,396 € 0,373 € View 0,316 € 0,303 € 0,297 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.03 mm	7.62 mm		M6
Mounting Fixings HI-TORQUE INSERT, BRASS 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M8 SI 1: 0,834 € 2.776In Stock	Mfr. Part No. IUTB-M8 Mouser Part No 153-IUTB-M8	SI	Mounting Fixings HI-TORQUE INSERT, BRASS 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	2.776In Stock	0,834 € 0,593 € 0,486 € 0,412 € View 0,396 € 0,385 € 0,363 € 0,355 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	9.6 mm	12.7 mm	10.31 mm	M8
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-032-1 SI 1: 0,344 € 33In Stock 10.000Expected 1/29/2027	Mfr. Part No. IUB-032-1 Mouser Part No 153-IUB-032-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	33In Stock 10.000Expected 1/29/2027	0,344 € 0,249 € 0,20 € 0,18 € View 0,167 € 0,162 € 0,153 € 0,15 € 0,144 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.267 in	0.225 in	0.297 in	10-32
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M4-1 SI 1: 0,241 € 2.461In Stock 20.000On Order	Mfr. Part No. IUB-M4-1 Mouser Part No 153-IUB-M4-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	2.461In Stock 20.000On Order On Order Ship Dates Mfr. No: IUB-M4-1 Stock: 2.461 Can Dispatch Immediately On Order: 10.000 Expected 2/8/2027 10.000 Expected 2/26/2027 Factory Lead Time: 17 Weeks	0,241 € 0,173 € 0,138 € 0,125 € View 0,115 € 0,113 € 0,106 € 0,103 € 0,10 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.74 mm	4.7 mm	6.35 mm	M4
Mounting Fixings ULTRASONIC INSERT, BRASS IUBB-M3-1 SI 1: 0,318 € 8.164In Stock	Mfr. Part No. IUBB-M3-1 Mouser Part No 153-IUBB-M3-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8.164In Stock	0,318 € 0,226 € 0,181 € 0,17 € View 0,144 € 0,138 € 0,135 € 0,131 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.05 mm	3.81 mm	5.56 mm	M3
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-032-1 SI 1: 0,714 € 943In Stock	Mfr. Part No. IUC-032-1 Mouser Part No 153-IUC-032-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	943In Stock	0,714 € 0,507 € 0,406 € 0,382 € View 0,324 € 0,31 € 0,304 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.267 in	0.225 in	0.297 in	10-32