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	Packaging
Mounting Fixings TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL IUC-M2-1 SI 1: 0,378 € 681In Stock 5.000Expected 11/23/2026	Mfr. Part No. IUC-M2-1 Mouser Part No 153-IUC-M2-1	SI	Mounting Fixings TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	681In Stock 5.000Expected 11/23/2026	0,378 € 0,268 € 0,215 € 0,194 € View 0,18 € 0,175 € 0,164 € 0,161 € 0,156 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3 mm	2.92 mm		M2
Mounting Fixings HI-TORQUE INSERT, ALUMINUM 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-M4-470 SI 1: 0,327 € 828In Stock	Mfr. Part No. IUTA-M4-470 Mouser Part No 153-IUTA-M4-470	SI	Mounting Fixings HI-TORQUE INSERT, ALUMINUM 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	828In Stock	0,327 € 0,229 € 0,183 € 0,173 € View 0,146 € 0,14 € 0,137 € 0,132 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	5.67 mm	4.7 mm		M4
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-032 SI 1: 0,447 € 483In Stock	Mfr. Part No. IUTB-032 Mouser Part No 153-IUTB-032	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	483In Stock	0,447 € 0,313 € 0,251 € 0,237 € View 0,20 € 0,192 € 0,187 € 0,181 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.253 in	0.375 in	0.273 in	10-32
Mounting Fixings HI-TORQUE INSERT, BRASS .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-440-135 SI 1: 0,258 € 5.298In Stock	Mfr. Part No. IUTB-440-135 Mouser Part No 153-IUTB-440-135	SI	Mounting Fixings HI-TORQUE INSERT, BRASS .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	5.298In Stock	0,258 € 0,181 € 0,144 € 0,136 € View 0,114 € 0,11 € 0,108 € 0,104 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.158 in	0.135 in		4-40
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-256-1 SI 1: 0,232 € 990In Stock	Mfr. Part No. IUB-256-1 Mouser Part No 153-IUB-256-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	990In Stock	0,232 € 0,169 € 0,135 € 0,121 € View 0,113 € 0,109 € 0,103 € 0,101 € 0,097 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.118 in	0.115 in	0.141 in	2-56
Mounting Fixings HI-TORQUE INSERT, ALUMINUM 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-M5-572 SI 1: 0,439 € 973In Stock	Mfr. Part No. IUTA-M5-572 Mouser Part No 153-IUTA-M5-572	SI	Mounting Fixings HI-TORQUE INSERT, ALUMINUM 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	973In Stock	0,439 € 0,315 € 0,252 € 0,227 € View 0,211 € 0,205 € 0,194 € 0,189 € 0,182 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	6.43 mm	5.72 mm		M5
Mounting Fixings HI-TORQUE INSERT, BRASS .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-632-150 SI 1: 0,275 € 8.292In Stock	Mfr. Part No. IUTB-632-150 Mouser Part No 153-IUTB-632-150	SI	Mounting Fixings HI-TORQUE INSERT, BRASS .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8.292In Stock	0,275 € 0,193 € 0,155 € 0,145 € View 0,123 € 0,118 € 0,115 € 0,111 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.189 in	0.15 in		6-32
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M6-1 SI 1: 0,912 € 1.680In Stock	Mfr. Part No. IUC-M6-1 Mouser Part No 153-IUC-M6-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.680In Stock	0,912 € 0,683 € 0,531 € 0,501 € View 0,49 € 0,474 € 0,458 € 0,441 € 0,434 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.86 mm	7.62 mm	9.52 mm	M6
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-832-2 SI 1: 0,284 € 9.721In Stock	Mfr. Part No. IUB-832-2 Mouser Part No 153-IUB-832-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.721In Stock	0,284 € 0,20 € 0,16 € 0,144 € View 0,131 € 0,129 € 0,122 € 0,12 € 0,115 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.208 in	0.312 in	0.25 in	8-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-440 SI 1: 0,284 € 8.245In Stock	Mfr. Part No. IUTB-440 Mouser Part No 153-IUTB-440	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8.245In Stock	0,284 € 0,196 € 0,157 € 0,146 € View 0,123 € 0,12 € 0,117 € 0,114 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.158 in	0.226 in	0.179 in	4-40
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-632 SI 1: 0,292 € 9.510In Stock	Mfr. Part No. IUTB-632 Mouser Part No 153-IUTB-632	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.510In Stock	0,292 € 0,206 € 0,164 € 0,148 € View 0,134 € 0,133 € 0,126 € 0,123 € 0,119 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.189 in	0.281 in	0.21 in	6-32
Mounting Fixings ISC-440 DBL ENDED NUT ISC-440 SI 1: 0,585 € 557In Stock	Mfr. Part No. ISC-440 Mouser Part No 153-ISC-440	SI	Mounting Fixings ISC-440 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	557In Stock	0,585 € 0,413 € 0,33 € 0,311 € View 0,264 € 0,253 € 0,247 € 0,239 €	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Stainless Steel	0.157 in	0.226 in	0.182 in	4-40
Mounting Fixings ISC-M5 DBL ENDED NUT ISC-M5 SI 1: 0,937 € 65In Stock	Mfr. Part No. ISC-M5 Mouser Part No 153-ISC-M5	SI	Mounting Fixings ISC-M5 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	65In Stock	0,937 € 0,701 € 0,545 € 0,514 € View 0,503 € 0,486 € 0,47 € 0,452 € 0,446 €	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Stainless Steel	6.4 mm	9.52 mm	7.01 mm	M5
Mounting Fixings ULTRASONIC INSERT, ALUMINUM IUA-M2.5-2 SI 1: 0,335 € 785In Stock	Mfr. Part No. IUA-M2.5-2 Mouser Part No 153-IUA-M2.5-2	SI	Mounting Fixings ULTRASONIC INSERT, ALUMINUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	785In Stock	0,335 € 0,235 € 0,188 € 0,177 € View 0,15 € 0,144 € 0,14 € 0,136 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.58 mm	5.56 mm	4.37 mm	M2.5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M6-1 SI 1: 0,49 € 608In Stock 10.000Expected 1/29/2027	Mfr. Part No. IUB-M6-1 Mouser Part No 153-IUB-M6-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	608In Stock 10.000Expected 1/29/2027	0,49 € 0,353 € 0,283 € 0,255 € View 0,237 € 0,23 € 0,217 € 0,212 € 0,205 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.86 mm	7.62 mm	9.52 mm	M6
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-832-2 SI 1: 0,705 € 1.215In Stock	Mfr. Part No. IUC-832-2 Mouser Part No 153-IUC-832-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.215In Stock	0,705 € 0,495 € 0,396 € 0,373 € View 0,316 € 0,304 € 0,297 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.208 in	0.312 in	0.25 in	8-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-M5 SI 1: 0,447 € 5.793In Stock	Mfr. Part No. IUTB-M5 Mouser Part No 153-IUTB-M5	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	5.793In Stock	0,447 € 0,314 € 0,252 € 0,237 € View 0,20 € 0,192 € 0,188 € 0,181 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	9.52 mm	6.93 mm	M5
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M3.5 SI 1: 0,636 € 4.655In Stock 5.250On Order	Mfr. Part No. IUTC-M3.5 Mouser Part No 153-IUTC-M3.5	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	4.655In Stock 5.250On Order	0,636 € 0,448 € 0,359 € 0,338 € View 0,286 € 0,274 € 0,268 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.81 mm	7.14 mm	5.33 mm	M3.5
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-M3 DBL ENDED ISB-M3 SI 1: 0,344 € 4.564In Stock	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	4.564In Stock	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 € 3.318In 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	3.318In 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 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, 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 € 405In 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	405In 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