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, AULM
Datasheet
486In Stock
10.000Expected 11/13/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.58 mm 5.56 mm 4.37 mm M3
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 ISC-M4 DBL ENDED NUT
Datasheet
430In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 5.62 mm 8.15 mm 6.22 mm M4
SI Mounting Fixings ISC-M5 DBL ENDED NUT
Datasheet
85In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 6.4 mm 9.52 mm 7.01 mm M5
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
392In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, ALUMINUM
Datasheet
985In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Fixings ULTRASONIC INSERT, AL
Datasheet
594In Stock
10.000Expected 10/23/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Fixings ULTRASONIC INSERT, AULM
Datasheet
284In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
942In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.321 in 0.5 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
214In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
13In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1.265In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
615In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.316 in 0.3 in 0.342 in 1/4-20
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
351In 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, ALUM
Datasheet
481In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1.330In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.246 in 0.375 in 0.297 in 10-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1.015In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1.515In Stock
10.000Expected 11/6/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.141 in 0.219 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
594In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
253In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
659In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
949In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.158 in 0.135 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
1.710In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.223 in 0.321 in 0.243 in 8-32