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-632 SI 1: 0,456 € 1.997In Stock	Mfr. Part No. IUTFB-632 Mouser Part No 153-IUTFB-632	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.997In Stock	0,456 € 0,323 € 0,258 € 0,243 € View 0,206 € 0,197 € 0,193 € 0,187 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.189 in	0.281 in	0.25 in	6-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-M2 SI 1: 0,413 € 7.484In Stock 10.000Expected 2/12/2027	Mfr. Part No. IUTFB-M2 Mouser Part No 153-IUTFB-M2	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7.484In Stock 10.000Expected 2/12/2027	0,413 € 0,297 € 0,237 € 0,214 € View 0,199 € 0,193 € 0,182 € 0,178 € 0,172 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.99 mm	4.75 mm	M2	Bulk
Mounting Fixings ISC-0420 DBL ENDED NUT ISC-0420 SI 1: 1,20 € 13.412In Stock	Mfr. Part No. ISC-0420 Mouser Part No 153-ISC-0420	SI	Mounting Fixings ISC-0420 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	13.412In Stock	1,20 € 0,894 € 0,695 € 0,654 € View 0,64 € 0,618 € 0,597 € 0,575 € Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Stainless Steel	0.315 in	0.5 in	0.338 in	1/4-20
Mounting Fixings ULTRASONIC INSERT, AL IUA-M3-1 SI 1: 0,224 € 8.732In Stock	Mfr. Part No. IUA-M3-1 Mouser Part No 153-IUA-M3-1	SI	Mounting Fixings ULTRASONIC INSERT, AL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8.732In Stock	0,224 € 0,155 € 0,124 € 0,117 € View 0,098 € 0,094 € 0,092 € 0,089 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-0616-2 SI 1: 1,50 € 925In Stock	Mfr. Part No. IUB-0616-2 Mouser Part No 153-IUB-0616-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	925In Stock	1,50 € 1,12 € 0,877 € 0,819 € View 0,801 € 0,774 € 0,747 € 0,721 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.488 in	0.625 in	0.563 in	3/8-16
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M8-2 SI 1: 2,24 € 1.110In Stock	Mfr. Part No. IUC-M8-2 Mouser Part No 153-IUC-M8-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.110In Stock	2,24 € 1,68 € 1,31 € 1,22 € View 1,20 € 1,15 € 1,12 € 1,08 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	10.19 mm	14.27 mm	11.91 mm	M8
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-024 SI 1: 0,937 € 1.487In Stock	Mfr. Part No. IUTC-024 Mouser Part No 153-IUTC-024	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.487In Stock	0,937 € 0,696 € 0,542 € 0,511 € View 0,499 € 0,482 € 0,465 € 0,449 € 0,442 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.253 in	0.375 in	0.273 in	10-24
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-0616 SI 1: 1,53 € 1.644In Stock	Mfr. Part No. IUTC-0616 Mouser Part No 153-IUTC-0616	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.644In Stock	1,53 € 1,14 € 0,894 € 0,837 € View 0,819 € 0,791 € 0,764 € 0,736 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.468 in	0.5 in	0.509 in	3/8-16
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-0518-1 SI 1: 2,22 € 890In Stock	Mfr. Part No. IUC-0518-1 Mouser Part No 153-IUC-0518-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	890In Stock	2,22 € 1,66 € 1,29 € 1,20 € View 1,19 € 1,14 € 1,10 € 1,07 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.431 in	0.335 in	0.469 in	5/16-18
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-0616-1 SI 1: 1,53 € 919In Stock	Mfr. Part No. IUB-0616-1 Mouser Part No 153-IUB-0616-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	919In Stock	1,53 € 1,14 € 0,894 € 0,833 € View 0,815 € 0,788 € 0,761 € 0,734 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.523 in	0.375 in	0.563 in	3/8-16
Mounting Fixings HI-TORQUE INSERT IUTA-M3 SI 1: 0,275 € 12.190In Stock 17.000Expected 12/21/2026	Mfr. Part No. IUTA-M3 Mouser Part No 153-IUTA-M3	SI	Mounting Fixings HI-TORQUE INSERT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	12.190In Stock 17.000Expected 12/21/2026	0,275 € 0,198 € 0,158 € 0,143 € View 0,132 € 0,129 € 0,121 € 0,119 € 0,114 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M5-572 SI 1: 0,765 € 9.395In Stock	Mfr. Part No. IUTC-M5-572 Mouser Part No 153-IUTC-M5-572	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.395In Stock	0,765 € 0,567 € 0,446 € 0,379 € View 0,378 € 0,366 € 0,36 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.43 mm	5.72 mm	6.93 mm	M5
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M6-762 SI 1: 1,04 € 4.715In Stock	Mfr. Part No. IUTC-M6-762 Mouser Part No 153-IUTC-M6-762	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	4.715In Stock	1,04 € 0,772 € 0,608 € 0,516 € View 0,498 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.03 mm	7.62 mm	8.69 mm	M6
Mounting Fixings ULTRASONIC INSERT, AULM IUA-M3-2 SI 1: 0,258 € 8.401In Stock	Mfr. Part No. IUA-M3-2 Mouser Part No 153-IUA-M3-2	SI	Mounting Fixings ULTRASONIC INSERT, AULM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8.401In Stock	0,258 € 0,179 € 0,144 € 0,135 € View 0,114 € 0,109 € 0,107 € 0,103 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Fixings ISB-M5 DBL ENDED NUT ISB-M5 SI 1: 0,697 € 1.130In Stock	Mfr. Part No. ISB-M5 Mouser Part No 153-ISB-M5	SI	Mounting Fixings ISB-M5 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.130In Stock	0,697 € 0,519 € 0,404 € 0,381 € View 0,373 € 0,36 € 0,348 € 0,335 € 0,33 €	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	6.4 mm	9.52 mm	7.01 mm	M5
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-0428-1 SI 1: 1,09 € 644In Stock	Mfr. Part No. IUC-0428-1 Mouser Part No 153-IUC-0428-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	644In Stock	1,09 € 0,815 € 0,635 € 0,598 € View 0,585 € 0,566 € 0,546 € 0,526 € Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.349 in	0.3 in	0.375 in	1/4-28
Mounting Fixings HI-TORQUE INSERT, ALUMINUM .225X.247 10-24 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-024-225 SI 1: 0,464 € 1.000In Stock	Mfr. Part No. IUTA-024-225 Mouser Part No 153-IUTA-024-225	SI	Mounting Fixings HI-TORQUE INSERT, ALUMINUM .225X.247 10-24 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.000In Stock	0,464 € 0,329 € 0,264 € 0,237 € View 0,22 € 0,214 € 0,202 € 0,198 € 0,191 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.253 in	0.225 in	0.237 in	10-24
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-832 SI 1: 0,507 € 89In Stock	Mfr. Part No. IUTFB-832 Mouser Part No 153-IUTFB-832	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	89In Stock	0,507 € 0,363 € 0,291 € 0,261 € View 0,243 € 0,237 € 0,223 € 0,218 € 0,211 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.223 in	0.321 in	0.281 in	8-32	Bulk
Mounting Fixings ISA-M4 DBL ENDED NUT ISA-M4 SI 1: 0,378 € 400In Stock	Mfr. Part No. ISA-M4 Mouser Part No 153-ISA-M4	SI	Mounting Fixings ISA-M4 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	400In Stock	0,378 € 0,268 € 0,215 € 0,194 € View 0,18 € 0,175 € 0,164 € 0,161 € 0,156 €	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Aluminum	5.62 mm	8.15 mm	6.22 mm	M4
Mounting Fixings ISB-0420 DBL ENDED NUT ISB-0420 SI 1: 0,783 € 776In Stock	Mfr. Part No. ISB-0420 Mouser Part No 153-ISB-0420	SI	Mounting Fixings ISB-0420 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	776In Stock	0,783 € 0,556 € 0,445 € 0,401 € View 0,372 € 0,362 € 0,341 € 0,334 € Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	0.315 in	0.5 in	0.338 in	1/4-20
Mounting Fixings ISB-256 DBL ENDED NUT ISB-256 SI 1: 0,37 € 967In Stock	Mfr. Part No. ISB-256 Mouser Part No 153-ISB-256	SI	Mounting Fixings ISB-256 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	967In Stock	0,37 € 0,265 € 0,212 € 0,191 € View 0,177 € 0,173 € 0,163 € 0,159 € 0,154 €	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	0.126 in	0.157 in	0.151 in	2-56
Mounting Fixings ISB-832 DBL ENDED NUT ISB-832 SI 1: 0,602 € 749In Stock	Mfr. Part No. ISB-832 Mouser Part No 153-ISB-832	SI	Mounting Fixings ISB-832 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	749In Stock	0,602 € 0,428 € 0,342 € 0,309 € View 0,286 € 0,279 € 0,262 € 0,257 € Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Brass	0.221 in	0.321 in	0.245 in	8-32
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-632 DBL ENDED NUT ISC-632 SI 1: 0,808 € 62In Stock	Mfr. Part No. ISC-632 Mouser Part No 153-ISC-632	SI	Mounting Fixings ISC-632 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	62In Stock	0,808 € 0,574 € 0,459 € 0,414 € View 0,384 € 0,373 € 0,352 € 0,344 € Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Stainless Steel	0.188 in	0.281 in	0.215 in	6-32
Mounting Fixings ULTRASONIC INSERT, ALUM IUA-024-2 SI 1: 0,37 € 1.950In Stock	Mfr. Part No. IUA-024-2 Mouser Part No 153-IUA-024-2	SI	Mounting Fixings ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1.950In Stock	0,37 € 0,264 € 0,212 € 0,19 € View 0,176 € 0,172 € 0,162 € 0,158 € 0,153 €	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.246 in	0.375 in	0.297 in	10-24