Mounting Fixings – Mouser Slovakia

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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
Mounting Fixings ISB-M3 DBL ENDED ISB-M3 SI 1: 0,344 € 14In Stock 10.000Expected 10/20/2026	Mfr. Part No. ISB-M3 Mouser Part No 153-ISB-M3	SI	Mounting Fixings ISB-M3 DBL ENDED Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	14In Stock 10.000Expected 10/20/2026	0,344 € 0,244 € 0,195 € 0,184 € View 0,156 € 0,149 € 0,146 € 0,141 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.99 mm	5.74 mm	4.62 mm	M3
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M4-2 SI 1: 0,292 € 2.048In Stock 10.000Expected 1/25/2027	Mfr. Part No. IUB-M4-2 Mouser Part No 153-IUB-M4-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	2.048In Stock 10.000Expected 1/25/2027	0,292 € 0,208 € 0,167 € 0,151 € View 0,139 € 0,136 € 0,128 € 0,125 € 0,12 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.28 mm	7.92 mm	6.35 mm	M4
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M3-1 SI 1: 0,413 € 2.072In Stock 10.000Expected 10/28/2026	Mfr. Part No. IUC-M3-1 Mouser Part No 153-IUC-M3-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	2.072In Stock 10.000Expected 10/28/2026	0,413 € 0,295 € 0,237 € 0,212 € View 0,198 € 0,192 € 0,181 € 0,177 € 0,171 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Fixings HI-TORQUE INSERT, ALUM IUTA-632 SI 1: 0,318 € 1.915In Stock	Mfr. Part No. IUTA-632 Mouser Part No 153-IUTA-632	SI	Mounting Fixings HI-TORQUE INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.915In Stock	0,318 € 0,231 € 0,185 € 0,167 € View 0,155 € 0,151 € 0,142 € 0,138 € 0,134 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.189 in	0.281 in	0.21 in	6-32
Mounting Fixings HI-TORQUE INSERT IUTA-M4 SI 1: 0,361 € 177In Stock 10.000Expected 1/29/2027	Mfr. Part No. IUTA-M4 Mouser Part No 153-IUTA-M4	SI	Mounting Fixings HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	177In Stock 10.000Expected 1/29/2027	0,361 € 0,256 € 0,206 € 0,185 € View 0,172 € 0,167 € 0,157 € 0,154 € 0,149 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	5.67 mm	8.15 mm	6.17 mm	M4
Mounting Fixings HI-TORQUE INSERT, ALUMINUM 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-M6-762 SI 1: 0,525 € 479In Stock	Mfr. Part No. IUTA-M6-762 Mouser Part No 153-IUTA-M6-762	SI	Mounting Fixings HI-TORQUE INSERT, ALUMINUM 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	479In Stock	0,525 € 0,378 € 0,303 € 0,272 € View 0,253 € 0,246 € 0,231 € 0,227 € 0,219 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	8.03 mm	7.62 mm		M6
Mounting Fixings HI-TORQUE INSERT, BRASS .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-032-225 SI 1: 0,482 € 381In Stock	Mfr. Part No. IUTB-032-225 Mouser Part No 153-IUTB-032-225	SI	Mounting Fixings HI-TORQUE INSERT, BRASS .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	381In Stock	0,482 € 0,347 € 0,278 € 0,249 € View 0,232 € 0,225 € 0,212 € 0,208 € 0,201 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.253 in	0.225 in		10-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-0420 SI 1: 0,679 € 505In Stock	Mfr. Part No. IUTFB-0420 Mouser Part No 153-IUTFB-0420	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	505In Stock	0,679 € 0,506 € 0,416 € 0,353 € View 0,35 € 0,338 € 0,326 € 0,321 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.316 in	0.5 in	0.375 in	1/4-20
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-632-1 SI 1: 0,206 € 1.098In Stock	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	1.098In Stock	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-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 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 IUBB-M3-1 SI 1: 0,318 € 8.593In 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	8.593In 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 HI-TORQUE INSERT IUTA-M2 SI 1: 0,275 € 7.320In Stock	Mfr. Part No. IUTA-M2 Mouser Part No 153-IUTA-M2	SI	Mounting Fixings HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7.320In Stock	0,275 € 0,19 € 0,152 € 0,143 € View 0,121 € 0,116 € 0,114 € 0,109 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.23 mm	4 mm	3.73 mm	M2
Mounting Fixings HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-M3-343 SI 1: 0,267 € 364In Stock 10.000Expected 10/30/2026	Mfr. Part No. IUTA-M3-343 Mouser Part No 153-IUTA-M3-343	SI	Mounting Fixings HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	364In Stock 10.000Expected 10/30/2026	0,267 € 0,184 € 0,147 € 0,138 € View 0,117 € 0,112 € 0,11 € 0,106 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	3.43 mm		M3
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-256 SI 1: 0,361 € 252In Stock	Mfr. Part No. IUTB-256 Mouser Part No 153-IUTB-256	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	252In Stock	0,361 € 0,26 € 0,207 € 0,187 € View 0,174 € 0,169 € 0,159 € 0,156 € 0,151 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.127 in	0.157 in	0.147 in	2-56
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-832 SI 1: 0,783 € 131In Stock	Mfr. Part No. IUTC-832 Mouser Part No 153-IUTC-832	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	131In Stock	0,783 € 0,588 € 0,458 € 0,432 € View 0,422 € 0,409 € 0,394 € 0,38 € 0,374 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.223 in	0.321 in	0.243 in	8-32
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 € 1.230In 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	1.230In 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, STAINLESS IUC-832-1 SI 1: 0,542 € 489In 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	489In 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 € 1.249In 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	1.249In 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 ULTRASONIC INSERT, ALUM IUA-M5-1 SI 1: 0,292 € 81In Stock	Mfr. Part No. IUA-M5-1 Mouser Part No 153-IUA-M5-1	SI	Mounting Fixings ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	81In Stock	0,292 € 0,206 € 0,165 € 0,156 € View 0,132 € 0,126 € 0,123 € 0,119 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	6.78 mm	5.72 mm	7.54 mm	M5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-032-2 SI 1: 0,533 € 754In Stock 10.000Expected 2/5/2027	Mfr. Part No. IUB-032-2 Mouser Part No 153-IUB-032-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	754In Stock 10.000Expected 2/5/2027	0,533 € 0,38 € 0,304 € 0,273 € View 0,255 € 0,247 € 0,233 € 0,228 € 0,22 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.246 in	0.375 in	0.297 in	10-32
Mounting Fixings HI-TORQUE INSERT, ALUM IUTA-256 SI 1: 0,292 € 253In Stock	Mfr. Part No. IUTA-256 Mouser Part No 153-IUTA-256	SI	Mounting Fixings HI-TORQUE INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	253In Stock	0,292 € 0,212 € 0,17 € 0,153 € View 0,142 € 0,138 € 0,13 € 0,127 € 0,123 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.127 in	0.157 in	0.147 in	2-56
Mounting Fixings HI-TORQUE INSERT, ALUM IUTA-440 SI 1: 0,284 € 659In Stock	Mfr. Part No. IUTA-440 Mouser Part No 153-IUTA-440	SI	Mounting Fixings HI-TORQUE INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	659In Stock	0,284 € 0,202 € 0,162 € 0,145 € View 0,135 € 0,132 € 0,124 € 0,121 € 0,117 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.158 in	0.226 in	0.179 in	4-40