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 (CRC) 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 Hardware ULTRASONIC INSERT, ALUM
Datasheet
1 121In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.25 mm 9.53 mm 7.54 mm M5
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
1 230In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.7 mm 6.35 mm 5.56 mm M3.5
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
525In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.246 in 0.375 in 0.297 in 10-32
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
489In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.226 in 0.185 in 0.25 in 8-32
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1 249In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware HI-TORQUE INSERT, BRASS
Datasheet
5In Stock
10 000Expected 8/17/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.218 in 4-40 Bulk
SI Mounting Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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 Hardware 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