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 (USD) 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, 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 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
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
514In 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, BRASS
Datasheet
10,021In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,310In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 10.19 mm 14.27 mm 11.91 mm M8
SI Mounting Fixings ULTRASONIC INSERT, AULM
Datasheet
2,489In Stock
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
132In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.25 mm 9.53 mm 7.54 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
1,249In Stock
10,000Expected 03/07/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 5.54 mm M2.5 Bulk
SI Mounting Fixings ISA-032 DBL ENDED NUT
Datasheet
986In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Aluminum 0.252 in 0.375 in 0.276 in 10-32
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
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
938In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
205In Stock
10,000Expected 28/08/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.15 mm 12.7 mm 9.52 mm M6
SI Mounting Fixings HI-TORQUE INSERT
Datasheet
697In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
504In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.03 mm 7.62 mm M6
SI Mounting Fixings HI-TORQUE INSERT, BRASS .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
831In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.225 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
759In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
635In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
294In Stock
10,000Expected 17/07/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
520In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.06 mm 11.1 mm 8.33 mm M5
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,514In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.107 in 0.188 in 0.141 in 2-56
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
12In Stock
12,000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.05 mm 3.81 mm 5.56 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
353In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.342 in 1/4-20