Mounting Hardware – Mouser Peru

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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 (PEN) 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 Hardware HI-TORQUE INSERT, STAINLESS STEEL .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTC-440-135 SI 1: S/ 2.41 9,296On Order	Mfr. Part # IUTC-440-135 Mouser Part # 153-IUTC-440-135	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,296On Order	S/ 2.41 S/ 1.70 S/ 1.36 S/ 1.28 View S/ 1.09 S/ 1.04 S/ 1.02 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.158 in	0.135 in	0.179 in	4-40
Mounting Hardware ISA-032 DBL ENDED NUT ISA-032 SI 1: S/ 1.95 9,996Expected 2/12/2027	Mfr. Part # ISA-032 Mouser Part # 153-ISA-032	SI	Mounting Hardware ISA-032 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,996Expected 2/12/2027	S/ 1.95 S/ 1.39 S/ 1.11 S/ 1.00 View S/ 0.93 S/ 0.903 S/ 0.852 S/ 0.833 S/ 0.806	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Aluminum	0.252 in	0.375 in	0.276 in	10-32
Mounting Hardware ULTRASONIC INSERT, BRASS IUBB-M5-2 SI 1: S/ 2.49 9,015Expected 11/24/2026	Mfr. Part # IUBB-M5-2 Mouser Part # 153-IUBB-M5-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,015Expected 11/24/2026	S/ 2.49 S/ 1.79 S/ 1.44 S/ 1.29 View S/ 1.20 S/ 1.17 S/ 1.10 S/ 1.07 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	7.06 mm	11.1 mm	8.33 mm	M5
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-440-1 SI 1: S/ 1.87 9,845Expected 2/26/2027	Mfr. Part # IUC-440-1 Mouser Part # 153-IUC-440-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,845Expected 2/26/2027	S/ 1.87 S/ 1.34 S/ 1.07 S/ 0.961 View S/ 0.895 S/ 0.868 S/ 0.817 S/ 0.802 S/ 0.775	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.153 in	0.135 in	0.172 in	4-40
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M5-1 SI 1: S/ 3.23 10,000Expected 1/25/2027	Mfr. Part # IUC-M5-1 Mouser Part # 153-IUC-M5-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,000Expected 1/25/2027	S/ 3.23 S/ 2.29 S/ 1.84 S/ 1.73 View S/ 1.47 S/ 1.41 S/ 1.37 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.78 mm	5.72 mm	7.54 mm	M5
Mounting Hardware HI-TORQUE INSERT, BRASS IUTB-M2.5 SI 1: S/ 1.52 47,993On Order	Mfr. Part # IUTB-M2.5 Mouser Part # 153-IUTB-M2.5	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	47,993On Order On Order Ship Dates Mfr. #: IUTB-M2.5 Stock: 0 On Order: 18,993 Expected 2/26/2027 29,000 Expected 3/5/2027 Factory Lead-Time: 20 Weeks	S/ 1.52 S/ 1.07 S/ 0.86 S/ 0.81 View S/ 0.685 S/ 0.654 S/ 0.642 S/ 0.619	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.01 mm	5.74 mm	4.55 mm	M2.5
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-0428 SI 1: S/ 5.22 8,617Expected 11/13/2026	Mfr. Part # IUTC-0428 Mouser Part # 153-IUTC-0428	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8,617Expected 11/13/2026	S/ 5.22 S/ 3.89 S/ 3.04 S/ 2.87 View S/ 2.81 S/ 2.71 S/ 2.62 S/ 2.53 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.316 in	0.5 in	0.342 in	1/4-28
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-256 SI 1: S/ 2.06 9,683Expected 1/11/2027	Mfr. Part # IUTC-256 Mouser Part # 153-IUTC-256	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,683Expected 1/11/2027	S/ 2.06 S/ 1.49 S/ 1.19 S/ 1.07 View S/ 0.996 S/ 0.969 S/ 0.915 S/ 0.891 S/ 0.864	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.127 in	0.157 in	0.147 in	2-56
Mounting Hardware HI-TORQUE INSERT, STAINLESS IUTC-440 SI 1: S/ 2.49 10,000Expected 2/12/2027	Mfr. Part # IUTC-440 Mouser Part # 153-IUTC-440	SI	Mounting Hardware HI-TORQUE INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	10,000Expected 2/12/2027	S/ 2.49 S/ 1.79 S/ 1.43 S/ 1.29 View S/ 1.19 S/ 1.16 S/ 1.09 S/ 1.07 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.158 in	0.226 in	0.179 in	4-40
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-632-1 SI 1: S/ 2.45 807Expected 11/17/2026	Mfr. Part # IUC-632-1 Mouser Part # 153-IUC-632-1	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	807Expected 11/17/2026	S/ 2.45 S/ 1.74 S/ 1.40 S/ 1.26 View S/ 1.17 S/ 1.14 S/ 1.07 S/ 1.05 Quote	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	0.199 in	0.15 in	0.219 in	6-32
Mounting Hardware ISC-M6 DBL ENDED NUT ISC-M6 SI 1: S/ 5.57 200Expected 1/1/2027	Mfr. Part # ISC-M6 Mouser Part # 153-ISC-M6	SI	Mounting Hardware ISC-M6 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	200Expected 1/1/2027	S/ 5.57 S/ 4.16 S/ 3.24 S/ 3.06 View S/ 2.99 S/ 2.89 S/ 2.79 S/ 2.69 Quote	Min.: 1 Mult.: 1	Screws & Fasteners	Nut, Double Ended	Stainless Steel	8 mm	12.7 mm	8.58 mm	M6
Mounting Hardware ULTRASONIC INSERT, ALUM IUA-632-2 SI 1: S/ 1.09 6,313Expected 1/11/2027	Mfr. Part # IUA-632-2 Mouser Part # 153-IUA-632-2	SI	Mounting Hardware ULTRASONIC INSERT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	6,313Expected 1/11/2027	S/ 1.09 S/ 0.79 S/ 0.631 S/ 0.568 View S/ 0.525 S/ 0.514 S/ 0.483 S/ 0.471 S/ 0.455	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.185 in	0.25 in	0.219 in	6-32
Mounting Hardware ULTRASONIC INSERT, AULM IUA-M3-2 SI 1: S/ 1.17 8,501Expected 11/19/2026	Mfr. Part # IUA-M3-2 Mouser Part # 153-IUA-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, AULM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	8,501Expected 11/19/2026	S/ 1.17 S/ 0.81 S/ 0.65 S/ 0.611 View S/ 0.514 S/ 0.494 S/ 0.483 S/ 0.467	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	3.58 mm	5.56 mm	4.37 mm	M3
Mounting Hardware ULTRASONIC INSERT, AULM IUA-M4-1 SI 1: S/ 1.13 1,998Expected 1/1/2027	Mfr. Part # IUA-M4-1 Mouser Part # 153-IUA-M4-1	SI	Mounting Hardware ULTRASONIC INSERT, AULM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,998Expected 1/1/2027	S/ 1.13 S/ 0.802 S/ 0.642 S/ 0.58 View S/ 0.537 S/ 0.522 S/ 0.49 S/ 0.483 S/ 0.467	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	5.74 mm	4.7 mm	6.35 mm	M4
Mounting Hardware ULTRASONIC INSERT, AL IUAA-M3-2 SI 1: S/ 1.36 9,349Expected 11/27/2026	Mfr. Part # IUAA-M3-2 Mouser Part # 153-IUAA-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, AL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,349Expected 11/27/2026	S/ 1.36 S/ 0.965 S/ 0.771 S/ 0.697 View S/ 0.646 S/ 0.627 S/ 0.592 S/ 0.58 S/ 0.561	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	4.7 mm	6.35 mm	5.56 mm	M3
Mounting Hardware ULTRASONIC INSERT, BRASS IUB-440-2 SI 1: S/ 1.09 9,020Expected 2/12/2027	Mfr. Part # IUB-440-2 Mouser Part # 153-IUB-440-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,020Expected 2/12/2027	S/ 1.09 S/ 0.779 S/ 0.623 S/ 0.561 View S/ 0.522 S/ 0.506 S/ 0.479 S/ 0.467 S/ 0.452	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.141 in	0.219 in	0.172 in	4-40
Mounting Hardware ULTRASONIC INSERT, BRASS IUBB-M3-2 SI 1: S/ 1.40 9,076Expected 1/29/2027	Mfr. Part # IUBB-M3-2 Mouser Part # 153-IUBB-M3-2	SI	Mounting Hardware ULTRASONIC INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	9,076Expected 1/29/2027	S/ 1.40 S/ 0.981 S/ 0.786 S/ 0.74 View S/ 0.627 S/ 0.599 S/ 0.588 S/ 0.568	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	4.7 mm	6.35 mm	5.56 mm	M3
Mounting Hardware ULTRASONIC INSERT, STAINLESS IUC-M5-2 SI 1: S/ 3.46 1,000Expected 2/5/2027	Mfr. Part # IUC-M5-2 Mouser Part # 153-IUC-M5-2	SI	Mounting Hardware ULTRASONIC INSERT, STAINLESS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,000Expected 2/5/2027	S/ 3.46 S/ 2.58 S/ 2.04 S/ 1.72 View S/ 1.67 S/ 1.64	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Stainless Steel	6.25 mm	9.53 mm	7.54 mm	M5
Mounting Hardware HI-TORQUE INSERT, ALUMINUM .125X.121 2-56 THREAD ULTRASONIC HEAT STAKING DIAGONAL IUTA-256-125 SI 1: S/ 1.32 4In Stock	Mfr. Part # IUTA-256-125 Mouser Part # 153-IUTA-256-125	SI	Mounting Hardware HI-TORQUE INSERT, ALUMINUM .125X.121 2-56 THREAD ULTRASONIC HEAT STAKING DIAGONAL Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	4In Stock	S/ 1.32 S/ 0.946 S/ 0.755 S/ 0.681 View S/ 0.631 S/ 0.615 S/ 0.58 S/ 0.568 S/ 0.549	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Aluminum	0.127 in	0.125 in		2-56
Mounting Hardware HI-TORQUE INSERT, BRASS IUTFB-632 SI 1: S/ 2.06 1,997In Stock	Mfr. Part # IUTFB-632 Mouser Part # 153-IUTFB-632	SI	Mounting Hardware HI-TORQUE INSERT, BRASS Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	1,997In Stock	S/ 2.06 S/ 1.46 S/ 1.17 S/ 1.10 View S/ 0.93 S/ 0.891 S/ 0.872 S/ 0.845	Min.: 1 Mult.: 1	Inserts	Threaded Insert	Brass	0.189 in	0.281 in	0.25 in	6-32
Mounting Hardware ISA-0420 DBL ENDED NUT ISA-0420 SI 10,000: S/ 0.923 Non-Stocked	Mfr. Part # ISA-0420 Mouser Part # 153-ISA-0420	SI	Mounting Hardware ISA-0420 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	Non-Stocked	S/ 0.923 S/ 0.903 S/ 0.872	Min.: 10,000 Mult.: 1,000	Screws & Fasteners	Nut, Double Ended	Aluminum	0.315 in	0.5 in	0.338 in	1/4-20
Mounting Hardware ISA-256 DBL ENDED NUT ALUM ISA-256 SI 10,000: S/ 0.631 Non-Stocked	Mfr. Part # ISA-256 Mouser Part # 153-ISA-256	SI	Mounting Hardware ISA-256 DBL ENDED NUT ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	Non-Stocked	S/ 0.631 S/ 0.615 S/ 0.596	Min.: 10,000 Mult.: 1,000	Screws & Fasteners	Nut, Double Ended	Aluminum	0.126 in	0.157 in	0.151 in	2-56
Mounting Hardware ISA-440 DBL ENDED NUT ISA-440 SI 10,000: S/ 0.65 Non-Stocked	Mfr. Part # ISA-440 Mouser Part # 153-ISA-440	SI	Mounting Hardware ISA-440 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	Non-Stocked	S/ 0.65 S/ 0.634 S/ 0.615	Min.: 10,000 Mult.: 1,000	Screws & Fasteners	Nut, Double Ended	Aluminum	0.157 in	0.226 in	0.182 in	4-40
Mounting Hardware ISA-632 DBL ENDED NUT, ALUM ISA-632 SI 10,000: S/ 0.642 Non-Stocked	Mfr. Part # ISA-632 Mouser Part # 153-ISA-632	SI	Mounting Hardware ISA-632 DBL ENDED NUT, ALUM Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	Non-Stocked	S/ 0.642 S/ 0.627 S/ 0.607	Min.: 10,000 Mult.: 1,000	Screws & Fasteners	Nut, Double Ended	Aluminum	0.188 in	0.281 in	0.215 in	6-32
Mounting Hardware ISA-832 DBL ENDED NUT ISA-832 SI 10,000: S/ 0.74 Non-Stocked	Mfr. Part # ISA-832 Mouser Part # 153-ISA-832	SI	Mounting Hardware ISA-832 DBL ENDED NUT Learn More about SI standard inserts ultrasonic heat staking inserts	Datasheet	Non-Stocked	S/ 0.74 S/ 0.724 S/ 0.701	Min.: 10,000 Mult.: 1,000	Screws & Fasteners	Nut, Double Ended	Aluminum	0.221 in	0.321 in	0.245 in	8-32