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 (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
4.760In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
4.876In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
704In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.349 in 0.3 in 0.375 in 1/4-28
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
2.105In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 3.43 mm M3
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
1.411In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
502In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
1.052In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.189 in 0.281 in 0.25 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
2.577In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
10.597In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
935In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.15 mm 12.7 mm 9.52 mm M6
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
837In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.246 in 0.375 in 0.297 in 10-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
6.592In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Fixings TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL
Datasheet
3.271In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3 mm 2.92 mm M2
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
604In Stock
10.000Expected 6/2/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.89 mm 3.43 mm 4.37 mm M2.5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
1.063In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.273 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
10.077In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.135 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
1.002In Stock
10.000Expected 8/24/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 12.7 mm 9.53 mm M6 Bulk
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 ULTRASONIC INSERT, BRASS
Datasheet
875In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
2.861In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.226 in 0.185 in 0.25 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
8.712In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
882In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.7 mm 6.71 mm 8.33 mm M5
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
4.302In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1.845In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
205In Stock
10.000Expected 8/28/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.15 mm 12.7 mm 9.52 mm M6