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
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (EUR) 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 ULTRASONIC INSERT, BRASS
Datasheet
1,362In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
380In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.267 in 0.225 in 0.297 in 10-24
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
6,244In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,300In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 10.19 mm 14.27 mm 11.91 mm M8
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 ISC-0420 DBL ENDED NUT
Datasheet
13,412In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 0.315 in 0.5 in 0.338 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
12,012In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.05 mm 3.81 mm 5.56 mm M3
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
967In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.523 in 0.375 in 0.563 in 3/8-16
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
1,654In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.468 in 0.5 in 0.509 in 3/8-16
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
915In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.431 in 0.335 in 0.469 in 5/16-18
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
949In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.488 in 0.625 in 0.563 in 3/8-16
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
5In Stock
10,000Expected 17/08/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.218 in 4-40 Bulk
SI Mounting Fixings HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
12,023In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.18 mm M2
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
9,486In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
34,451In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M2.5

SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
10,508In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
9,717In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 5.72 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4,875In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.03 mm 7.62 mm 8.69 mm M6
SI Mounting Fixings ISB-M5 DBL ENDED NUT
Datasheet
1,130In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Brass 6.4 mm 9.52 mm 7.01 mm M5
SI Mounting Fixings ISC-440 DBL ENDED NUT
Datasheet
557In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 0.157 in 0.226 in 0.182 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
2,761In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.226 in 0.185 in 0.25 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .225X.247 10-24 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,000In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.253 in 0.225 in 0.237 in 10-24
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,000In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.189 in 0.15 in 6-32
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .185X.217 8-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,000In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.223 in 0.185 in 8-32
SI Mounting Fixings ISA-M4 DBL ENDED NUT
Datasheet
400In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Aluminum 5.62 mm 8.15 mm 6.22 mm M4