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 (CAD) 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, ALUMINUM 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
397In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.43 mm 5.72 mm M5
SI Mounting Hardware HI-TORQUE INSERT, ALUMINUM 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
988In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 9.6 mm 12.7 mm 10.31 mm M8
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
824In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.273 in 10-24
SI Mounting Hardware HI-TORQUE INSERT, BRASS .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
16In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.3 in 0.342 in 1/4-20
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
254In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.342 in 1/4-28
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
333In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.468 in 0.5 in 0.509 in 3/8-16
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
1,523In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.375 in 0.273 in 10-24
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
415In 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 .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
915In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.3 in 0.342 in 1/4-20
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
570In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.135 in 0.179 in 4-40
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL .185X.217 8-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
940In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.185 in 0.243 in 8-32
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
880In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.312 in 10-32
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
898In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.127 in 0.157 in 0.187 in 2-56
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
114In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.223 in 0.321 in 0.281 in 8-32 Bulk
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
585In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass M10 Bulk
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
3,993In Stock
13,000Expected 2026-06-05
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
11,788On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Hardware HI-TORQUE INSERT
Datasheet
14,962On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
11,452On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
21,823On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.89 mm 3.43 mm 4.37 mm M2.5
SI Mounting Hardware HI-TORQUE INSERT, ALUMINUM .125X.121 2-56 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.127 in 0.125 in 2-56
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
9Expected 2026-03-30
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.218 in 4-40 Bulk
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
4,990Expected 2026-04-10
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
10,780On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
4,023On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.81 mm 7.14 mm 5.33 mm M3.5