Mounting Fixings – Mouser Denmark

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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 (DKK) 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 ULTRASONIC INSERT, BRASS IUB-M3-2 SI 1: 1,67 kr. 187.778In Stock 12.674On Order	Mfr. Part No. IUB-M3-2 Mouser Part No 153-IUB-M3-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	187.778In Stock 12.674On Order	1,67 kr. 1,14 kr. 0,918 kr. 0,858 kr. View 0,724 kr. 0,701 kr. 0,679 kr. 0,664 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-832 SI 1: 2,37 kr. 13.090In Stock	Mfr. Part No. IUTB-832 Mouser Part No 153-IUTB-832	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	13.090In Stock	2,37 kr. 1,67 kr. 1,34 kr. 1,26 kr. View 1,07 kr. 1,02 kr. 0,992 kr. 0,962 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.223 in	0.321 in	0.243 in	8-32
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M4 SI 1: 6,80 kr. 5.335In Stock 10.000Expected 02/11/2026	Mfr. Part No. IUTC-M4 Mouser Part No 153-IUTC-M4	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	5.335In Stock 10.000Expected 02/11/2026	6,80 kr. 5,09 kr. 3,96 kr. 3,74 kr. View 3,65 kr. 3,53 kr. 3,41 kr. 3,28 kr. 3,24 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.67 mm	8.15 mm	6.17 mm	M4
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-0420 SI 1: 7,76 kr. 3.764In Stock	Mfr. Part No. IUTC-0420 Mouser Part No 153-IUTC-0420	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	3.764In Stock	7,76 kr. 5,76 kr. 4,54 kr. 3,85 kr. View 3,72 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.316 in	0.5 in	0.342 in	1/4-20
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M3-343 SI 1: 5,20 kr. 8.586In Stock	Mfr. Part No. IUTC-M3-343 Mouser Part No 153-IUTC-M3-343	SI	Mounting Fixings 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	8.586In Stock	5,20 kr. 3,69 kr. 2,95 kr. 2,78 kr. View 2,36 kr. 2,26 kr. 2,22 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	3.43 mm	4.55 mm	M3
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-632-2 SI 1: 4,24 kr. 6.833In Stock	Mfr. Part No. IUC-632-2 Mouser Part No 153-IUC-632-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6.833In Stock	4,24 kr. 2,98 kr. 2,39 kr. 2,15 kr. View 1,99 kr. 1,94 kr. 1,82 kr. 1,78 kr. 1,72 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.185 in	0.25 in	0.219 in	6-32
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-M3 SI 1: 2,37 kr. 60.228In Stock	Mfr. Part No. IUTB-M3 Mouser Part No 153-IUTB-M3	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	60.228In Stock	2,37 kr. 1,69 kr. 1,35 kr. 1,22 kr. View 1,13 kr. 1,10 kr. 1,03 kr. 1,01 kr. 0,977 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Fixings HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M3-343 SI 1: 2,63 kr. 15.214In Stock	Mfr. Part No. IUTB-M3-343 Mouser Part No 153-IUTB-M3-343	SI	Mounting Fixings 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	2,63 kr. 1,87 kr. 1,49 kr. 1,34 kr. View 1,25 kr. 1,22 kr. 1,14 kr. 1,12 kr. 1,07 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	3.43 mm		M3
Mounting Fixings ULTRASONIC,INSERT,STAINLESS IUCC-M5-2 SI 1: 6,42 kr. 9.496In Stock	Mfr. Part No. IUCC-M5-2 Mouser Part No 153-IUCC-M5-2	SI	Mounting Fixings ULTRASONIC,INSERT,STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.496In Stock	6,42 kr. 4,77 kr. 3,72 kr. 3,50 kr. View 3,42 kr. 3,30 kr. 3,19 kr. 3,07 kr. 3,03 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	7.06 mm	11.1 mm	8.33 mm	M5
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M2-318 SI 1: 3,46 kr. 9.951In Stock	Mfr. Part No. IUTC-M2-318 Mouser Part No 153-IUTC-M2-318	SI	Mounting Fixings 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	9.951In Stock	3,46 kr. 2,45 kr. 1,95 kr. 1,76 kr. View 1,63 kr. 1,58 kr. 1,49 kr. 1,46 kr. 1,41 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.23 mm	3.18 mm	3.73 mm	M2
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M5-2 SI 1: 4,10 kr. 9.560In Stock	Mfr. Part No. IUB-M5-2 Mouser Part No 153-IUB-M5-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.560In Stock	4,10 kr. 2,91 kr. 2,33 kr. 2,10 kr. View 1,95 kr. 1,89 kr. 1,78 kr. 1,74 kr. 1,68 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.25 mm	9.53 mm	7.54 mm	M5
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M2.5-1 SI 1: 4,49 kr. 10.254In Stock	Mfr. Part No. IUC-M2.5-1 Mouser Part No 153-IUC-M2.5-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10.254In Stock	4,49 kr. 3,16 kr. 2,53 kr. 2,28 kr. View 2,11 kr. 2,05 kr. 1,93 kr. 1,89 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.89 mm	3.43 mm	4.37 mm	M2.5
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M6 SI 1: 8,50 kr. 9.083In Stock	Mfr. Part No. IUTC-M6 Mouser Part No 153-IUTC-M6	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.083In Stock	8,50 kr. 6,27 kr. 4,89 kr. 4,60 kr. View 4,50 kr. 4,35 kr. 4,20 kr. 4,05 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.03 mm	12.7 mm	8.69 mm	M6
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-M5 SI 1: 6,03 kr. 9.769In Stock	Mfr. Part No. IUTFB-M5 Mouser Part No 153-IUTFB-M5	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9.769In Stock	6,03 kr. 4,24 kr. 3,40 kr. 3,07 kr. View 2,84 kr. 2,76 kr. 2,60 kr. 2,54 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	9.53 mm	7.92 mm	M5
Mounting Fixings HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M2-318 SI 1: 3,01 kr. 11.055In Stock	Mfr. Part No. IUTB-M2-318 Mouser Part No 153-IUTB-M2-318	SI	Mounting Fixings 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	3,01 kr. 2,13 kr. 1,72 kr. 1,54 kr. View 1,40 kr. 1,39 kr. 1,31 kr. 1,28 kr. 1,23 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	3.18 mm		M2
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M2.5 SI 1: 5,52 kr. 10.328In Stock	Mfr. Part No. IUTC-M2.5 Mouser Part No 153-IUTC-M2.5	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10.328In Stock	5,52 kr. 3,92 kr. 3,14 kr. 2,82 kr. View 2,62 kr. 2,54 kr. 2,40 kr. 2,34 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	5.74 mm	4.55 mm	M2.5
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M3 SI 1: 5,45 kr. 36.897In Stock	Mfr. Part No. IUTC-M3 Mouser Part No 153-IUTC-M3	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	36.897In Stock	5,45 kr. 3,89 kr. 3,11 kr. 2,80 kr. View 2,60 kr. 2,53 kr. 2,39 kr. 2,33 kr. Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	4.01 mm	5.74 mm	4.55 mm	M3
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M4-470 SI 1: 7,06 kr. 3.711In Stock 10.000Expected 17/11/2026	Mfr. Part No. IUTC-M4-470 Mouser Part No 153-IUTC-M4-470	SI	Mounting Fixings 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	3.711In Stock 10.000Expected 17/11/2026	7,06 kr. 5,30 kr. 4,13 kr. 3,89 kr. View 3,81 kr. 3,69 kr. 3,55 kr. 3,42 kr. 3,37 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.67 mm	4.7 mm	6.17 mm	M4
Mounting Fixings HI-TORQUE INSERT, STAINLESS IUTC-M5 SI 1: 5,97 kr. 6.901In Stock	Mfr. Part No. IUTC-M5 Mouser Part No 153-IUTC-M5	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6.901In Stock	5,97 kr. 4,46 kr. 3,47 kr. 3,27 kr. View 3,20 kr. 3,10 kr. 2,98 kr. 2,88 kr. 2,83 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.43 mm	9.52 mm	6.93 mm	M5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M3-1 SI 1: 1,41 kr. 23.744In Stock 25.000Expected 12/02/2027	Mfr. Part No. IUB-M3-1 Mouser Part No 153-IUB-M3-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	23.744In Stock 25.000Expected 12/02/2027	1,41 kr. 1,02 kr. 0,813 kr. 0,739 kr. View 0,679 kr. 0,664 kr. 0,627 kr. 0,612 kr. 0,589 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-M2 SI 1: 2,95 kr. 14.912In Stock	Mfr. Part No. IUTB-M2 Mouser Part No 153-IUTB-M2	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	14.912In Stock	2,95 kr. 2,13 kr. 1,71 kr. 1,54 kr. View 1,42 kr. 1,39 kr. 1,31 kr. 1,28 kr. 1,23 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.23 mm	4 mm	3.73 mm	M2
Mounting Fixings HI-TORQUE INSERT, BRASS 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M4-470 SI 1: 3,14 kr. 9.866In 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	9.866In Stock	3,14 kr. 2,19 kr. 1,76 kr. 1,66 kr. View 1,40 kr. 1,34 kr. 1,31 kr. 1,26 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	4.7 mm		M4
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-M4 SI 1: 3,85 kr. 29.191In Stock 11.000Expected 10/11/2026	Mfr. Part No. IUTFB-M4 Mouser Part No 153-IUTFB-M4	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	29.191In Stock 11.000Expected 10/11/2026	3,85 kr. 2,75 kr. 2,20 kr. 1,98 kr. View 1,84 kr. 1,79 kr. 1,69 kr. 1,65 kr. 1,59 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	5.67 mm	8.15 mm	7.14 mm	M4
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M3-1 SI 1: 3,08 kr. 9.642In Stock	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	9.642In Stock	3,08 kr. 2,20 kr. 1,77 kr. 1,58 kr. View 1,48 kr. 1,43 kr. 1,35 kr. 1,32 kr. 1,28 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.89 mm	3.43 mm	4.37 mm	M3
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M3-2 SI 1: 3,33 kr. 20.472In Stock 88.141On Order	Mfr. Part No. IUC-M3-2 Mouser Part No 153-IUC-M3-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	20.472In Stock 88.141On Order On Order Ship Dates Mfr. No: IUC-M3-2 Stock: 20.472 Can Dispatch Immediately On Order: 26.141 Pending 62.000 Expected 10/11/2026 Factory Lead Time: 19 Weeks	3,33 kr. 2,38 kr. 1,90 kr. 1,72 kr. View 1,59 kr. 1,54 kr. 1,45 kr. 1,42 kr. 1,38 kr.	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M3