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.

Results: 268
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Description Datasheet Availability Pricing (SGD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Product
Type
Material
Mounting Hole Size
Length
Outside Diameter
Thread Size
Packaging
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
154In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.342 in 1/4-28
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
313In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.468 in 0.5 in 0.509 in 3/8-16
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
1,487In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.375 in 0.273 in 10-24
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
943In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.225 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
909In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.3 in 0.342 in 1/4-20
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
380In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.189 in 0.15 in 0.21 in 6-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
161In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .185X.217 8-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
940In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.185 in 0.243 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
860In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.312 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
896In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.127 in 0.157 in 0.187 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
114In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.223 in 0.321 in 0.281 in 8-32 Bulk
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
549In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass M10 Bulk
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
462In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.81 mm 7.14 mm 6.35 mm M3.5 Bulk
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
265,950On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
9,030Expected 5/6/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.67 mm 4.7 mm 6.17 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
9,744Expected 19/6/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
8,617Expected 10/9/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.5 in 0.342 in 1/4-28
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
180Expected 18/6/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.246 in 0.375 in 0.297 in 10-24
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .125X.121 2-56 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.127 in 0.125 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
987Expected 18/6/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
Lead-Time 11 Weeks
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.267 in 0.225 in 0.297 in 10-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Brass 0.141 in 0.219 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
Lead-Time 2 Weeks
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Fixings ISA-0420 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.315 in 0.5 in 0.338 in 1/4-20
SI Mounting Fixings ISA-256 DBL ENDED NUT ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.126 in 0.157 in 0.151 in 2-56