Mounting Fixings – Mouser Israel

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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 (USD) 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-M2.5 SI 1: $0.56 7,616In 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	7,616In Stock	$0.56 $0.403 $0.322 $0.29 View $0.269 $0.262 $0.247 $0.242 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	5.54 mm	M2.5	Bulk
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-M3 SI 1: $0.44 19,795In Stock 19,000Expected 02/10/2026	Mfr. Part No. IUTFB-M3 Mouser Part No 153-IUTFB-M3	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	19,795In Stock 19,000Expected 02/10/2026	$0.44 $0.313 $0.25 $0.236 View $0.20 $0.191 $0.187 $0.181	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	5.54 mm	M3
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M6-2 SI 1: $1.42 9,562In Stock	Mfr. Part No. IUC-M6-2 Mouser Part No 153-IUC-M6-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,562In Stock	$1.42 $1.06 $0.821 $0.773 View $0.756 $0.731 $0.706 $0.681 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	8.15 mm	12.7 mm	9.52 mm	M6
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-M3-2 SI 1: $0.52 15,572In Stock 98,141On 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	15,572In Stock 98,141On Order On Order Ship Dates Mfr. No: IUC-M3-2 Stock: 15,572 Can Dispatch Immediately On Order: 36,141 Pending 62,000 Expected 20/11/2026 Factory Lead Time: 19 Weeks	$0.52 $0.371 $0.297 $0.267 View $0.248 $0.241 $0.227 $0.222 $0.215	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Fixings HI-TORQUE INSERT, BRASS IUTB-M5 SI 1: $0.52 8,118In 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	8,118In Stock	$0.52 $0.365 $0.293 $0.276 View $0.233 $0.223 $0.219 $0.211	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	9.52 mm	6.93 mm	M5
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-024-2 SI 1: $0.87 9,048In Stock 1,132On Order	Mfr. Part No. IUC-024-2 Mouser Part No 153-IUC-024-2	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,048In Stock 1,132On Order	$0.87 $0.646 $0.509 $0.431 View $0.416 $0.41	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.246 in	0.375 in	0.297 in	10-24
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUCC-M3-1 SI 1: $0.64 11,866In Stock	Mfr. Part No. IUCC-M3-1 Mouser Part No 153-IUCC-M3-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	11,866In Stock	$0.64 $0.449 $0.36 $0.324 View $0.30 $0.292 $0.275 $0.269 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	5.05 mm	3.81 mm	5.56 mm	M3
Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-M8 SI 1: $1.45 10,201In Stock	Mfr. Part No. IUTC-M8 Mouser Part No 153-IUTC-M8	SI	Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,201In Stock	$1.45 $1.08 $0.839 $0.79 View $0.773 $0.747 $0.721 $0.696 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	9.6 mm	12.7 mm	10.31 mm	M8
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M2.5-2 SI 1: $0.47 9,486In Stock	Mfr. Part No. IUB-M2.5-2 Mouser Part No 153-IUB-M2.5-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,486In Stock	$0.47 $0.329 $0.264 $0.248 View $0.21 $0.201 $0.197 $0.19	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	3.58 mm	5.56 mm	4.37 mm	M2.5
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-0420-1 SI 1: $0.55 700In Stock	Mfr. Part No. IUB-0420-1 Mouser Part No 153-IUB-0420-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	700In Stock	$0.55 $0.391 $0.313 $0.282 View $0.262 $0.255 $0.24 $0.235 $0.227	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.349 in	0.3 in	0.375 in	1/4-20
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-832-1 SI 1: $0.27 2,521In Stock	Mfr. Part No. IUB-832-1 Mouser Part No 153-IUB-832-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	2,521In Stock	$0.27 $0.195 $0.156 $0.14 View $0.13 $0.127 $0.119 $0.117 $0.113	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.226 in	0.185 in	0.25 in	8-32
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M5-1 SI 1: $0.43 7,681In Stock	Mfr. Part No. IUB-M5-1 Mouser Part No 153-IUB-M5-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7,681In Stock	$0.43 $0.31 $0.248 $0.223 View $0.207 $0.201 $0.19 $0.186 $0.179	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.78 mm	5.72 mm	7.54 mm	M5
Mounting Fixings ULTRASONIC INSERT, BRASS IUBB-M5-1 SI 1: $0.43 682In Stock	Mfr. Part No. IUBB-M5-1 Mouser Part No 153-IUBB-M5-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	682In Stock	$0.43 $0.301 $0.241 $0.227 View $0.192 $0.184 $0.18 $0.174	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	7.7 mm	6.71 mm	8.33 mm	M5
Mounting Fixings HI-TORQUE INSERT, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTB-M5-572 SI 1: $0.56 1,161In Stock	Mfr. Part No. IUTB-M5-572 Mouser Part No 153-IUTB-M5-572	SI	Mounting Fixings HI-TORQUE INSERT, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,161In Stock	$0.56 $0.397 $0.318 $0.286 View $0.266 $0.258 $0.244 $0.238 $0.23	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	6.43 mm	5.72 mm		M5
Mounting Fixings HI-TORQUE INSERT, BRASS IUTFB-440 SI 1: $0.48 9,989In Stock	Mfr. Part No. IUTFB-440 Mouser Part No 153-IUTFB-440	SI	Mounting Fixings HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,989In Stock	$0.48 $0.337 $0.27 $0.243 View $0.222 $0.219 $0.206 $0.202 $0.195	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.158 in	0.226 in	0.218 in	4-40	Bulk
Mounting Fixings ULTRASONIC INSERT, ALUM IUA-440-1 SI 1: $0.26 1,426In Stock	Mfr. Part No. IUA-440-1 Mouser Part No 153-IUA-440-1	SI	Mounting Fixings ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,426In Stock	$0.26 $0.188 $0.151 $0.136 View $0.126 $0.122 $0.115 $0.113 $0.109	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.153 in	0.135 in	0.172 in	4-40
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-632-2 SI 1: $0.27 7,377In Stock	Mfr. Part No. IUB-632-2 Mouser Part No 153-IUB-632-2	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	7,377In Stock	$0.27 $0.191 $0.153 $0.144 View $0.122 $0.116 $0.114 $0.11	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.185 in	0.25 in	0.219 in	6-32
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-M6-2 SI 1: $1.00 785In 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	785In Stock	$1.00 $0.747 $0.615 $0.522 View $0.517 $0.50 $0.482 $0.475	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	8.15 mm	12.7 mm	9.52 mm	M6
Mounting Fixings ULTRASONIC INSERT, STAINLESS IUC-440-1 SI 1: $0.48 3,211In Stock	Mfr. Part No. IUC-440-1 Mouser Part No 153-IUC-440-1	SI	Mounting Fixings ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	3,211In Stock	$0.48 $0.343 $0.275 $0.247 View $0.23 $0.223 $0.21 $0.206 $0.199	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.153 in	0.135 in	0.172 in	4-40
Mounting Fixings TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL IUC-M2-1 SI 1: $0.44 2,091In Stock	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	2,091In Stock	$0.44 $0.312 $0.25 $0.225 View $0.209 $0.203 $0.191 $0.187 $0.181	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: $0.38 928In 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	928In Stock	$0.38 $0.266 $0.213 $0.201 View $0.17 $0.163 $0.159 $0.154	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: $0.52 958In 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	958In Stock	$0.52 $0.364 $0.292 $0.275 View $0.233 $0.223 $0.218 $0.211	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: $0.30 8,098In 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	8,098In Stock	$0.30 $0.21 $0.168 $0.158 View $0.133 $0.128 $0.125 $0.121	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.158 in	0.135 in		4-40
Mounting Fixings ULTRASONIC INSERT, BRASS IUB-032-1 SI 1: $0.40 33In Stock 10,000Expected 01/10/2026	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 01/10/2026	$0.40 $0.29 $0.232 $0.209 View $0.194 $0.188 $0.178 $0.174 $0.168	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-440-1 SI 1: $0.22 9,994In Stock	Mfr. Part No. IUB-440-1 Mouser Part No 153-IUB-440-1	SI	Mounting Fixings ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,994In Stock	$0.22 $0.155 $0.124 $0.117 View $0.098 $0.094 $0.092 $0.089	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.153 in	0.135 in	0.172 in	4-40