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.

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Description Datasheet Availability Pricing (SGD) 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
Datasheet
7,458In 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
3,766In Stock
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
8,966In 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, STAINLESS
Datasheet
8,305In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.189 in 0.281 in 0.21 in 6-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
7,489In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.23 mm 4 mm 3.73 mm M2
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
8,458In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
66,983In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
8,885In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.67 mm 8.15 mm 6.17 mm M4


SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
35,588In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
14,267In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings ULTRASONIC,INSERT,STAINLESS
Datasheet
9,496In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 7.06 mm 11.1 mm 8.33 mm M5
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
10,451In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.23 mm 3.18 mm 3.73 mm M2
SI Mounting Fixings HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
11,675In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.18 mm M2
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
10,955In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 5.74 mm 4.55 mm M2.5
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
10,444In Stock
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, STAINLESS
Datasheet
9,233In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
9,819In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 9.53 mm 7.92 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
118,525In Stock
115,041On Order
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
Datasheet
7,628In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 5.54 mm M2.5 Bulk
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
8,495In Stock
31,000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 5.54 mm M3
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
39,271In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4,786In Stock
10,000Expected 17/11/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.67 mm 4.7 mm 6.17 mm M4
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
7,650In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
8,905In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.99 mm 4.75 mm M2 Bulk
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
41,813In Stock
99,000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.58 mm 5.56 mm 4.37 mm M3