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 (INR) 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, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
12,584In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.18 mm M2
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
14,335In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
20,566In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.67 mm 8.15 mm 7.14 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
10,450In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
16,463In Stock
14,000Expected 28-07-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
11,477In 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, BRASS
Datasheet
19,772In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
10,564In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 9.53 mm 7.92 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
14,447In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 3.43 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
11,110In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 5.54 mm M3
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
11,433In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
4,400In Stock
1,000Expected 22-04-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.5 in 0.342 in 1/4-20
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
11,690In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 3.43 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
24,253In Stock
33,000Expected 08-05-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
9,640In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
9,870In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1,18,098In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,481In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.189 in 0.15 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, BRASS
Datasheet
749In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,319In 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
1,365In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
2,820In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
447In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.226 in 0.179 in 4-40