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 (EUR) 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 ULTRASONIC INSERT, STAINLESS
Datasheet
5,287In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Fixings TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL
Datasheet
2,261In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3 mm 2.92 mm M2
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
953In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.67 mm 4.7 mm M4
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
958In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.273 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
8,792In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.135 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
806In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.135 in 0.179 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, BRASS 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
698In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 7.62 mm M6
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
710In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
7,298In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
8,241In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
682In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.7 mm 6.71 mm 8.33 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,211In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 5.72 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
9,136In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
8,554In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 3.43 mm M3
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
1,184In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.375 in 0.273 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
939In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, BRASS .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
456In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.189 in 0.15 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
933In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.267 in 0.225 in 0.297 in 10-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
31In Stock
10,000Expected 18/09/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
2,791In Stock
10,000Expected 13/08/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
954In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.267 in 0.225 in 0.297 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
1,211In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
9,721In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
10,278In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.189 in 0.281 in 0.21 in 6-32
SI Mounting Fixings ISB-M4 DBL ENDED NUT
Datasheet
363In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Brass 5.62 mm 8.15 mm 6.22 mm M4