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, 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 ULTRASONIC INSERT, STAINLESS
Datasheet
953In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Fixings HI-TORQUE INSERT
Datasheet
4.360In Stock
27.000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 5.74 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
884In Stock
10.000Expected 10/30/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 3.43 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
252In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
151In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
9.408In Stock
28.000Expected 11/20/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.89 mm 3.43 mm 4.37 mm M2.5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
84In Stock
10.000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
270In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.06 mm 11.1 mm 8.33 mm M5
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
798In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.107 in 0.188 in 0.141 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
353In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.342 in 1/4-20
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
7.485In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Fixings HI-TORQUE INSERT, BRASS 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
3.016In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 9.6 mm 12.7 mm 10.31 mm M8
SI Mounting Fixings ULTRASONIC INSERT, AULM
Datasheet
486In Stock
10.000Expected 11/13/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.58 mm 5.56 mm 4.37 mm M3
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1.362In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
380In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.267 in 0.225 in 0.297 in 10-24
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
6.244In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
1.487In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.375 in 0.273 in 10-24
SI Mounting Fixings ISC-M4 DBL ENDED NUT
Datasheet
430In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 5.62 mm 8.15 mm 6.22 mm M4
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
392In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, ALUMINUM
Datasheet
885In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Fixings ULTRASONIC INSERT, AL
Datasheet
594In Stock
10.000Expected 10/23/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Fixings ULTRASONIC INSERT, AULM
Datasheet
284In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.74 mm 4.7 mm 6.35 mm M4
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