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 Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
9,085In Stock
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

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


SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
36,158In Stock
A tariff of 45% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
14,287In Stock
A tariff of 45% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
3,776In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.5 in 0.342 in 1/4-20
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
8,960In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 3.43 mm 4.55 mm M3
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
7,619In Stock
A tariff of 38% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.23 mm 4 mm 3.73 mm M2
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
7,688In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
8,458In Stock
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
69,081In Stock
A tariff of 45% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
11,131In Stock
A tariff of 38% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 5.74 mm 4.55 mm M2.5
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
10,544In Stock
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.89 mm 3.43 mm 4.37 mm M2.5
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
9,233In Stock
A tariff of 38% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
9,919In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 9.53 mm 7.92 mm M5
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, STAINLESS STEEL 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
10,531In Stock
A tariff of 38% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.23 mm 3.18 mm 3.73 mm M2
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
10,261In Stock
31,000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.67 mm 8.15 mm 7.14 mm M4
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
18,742In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 4 mm 3.73 mm M2
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
39,401In Stock
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4,948In Stock
10,000Expected 11/17/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.67 mm 4.7 mm 6.17 mm M4
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
8,170In Stock
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
9,320In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.99 mm 4.75 mm M2 Bulk
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
118,633In Stock
115,041On Order
A tariff of 45% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
7,978In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 5.54 mm M2.5 Bulk
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
40,936In Stock
99,977On Order
A tariff of 42% may be applied if shipping to the United States.
Min.: 1
Mult.: 1

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