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 (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 HI-TORQUE INSERT
Datasheet
697In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
504In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.03 mm 7.62 mm M6
SI Mounting Fixings HI-TORQUE INSERT, BRASS .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
831In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.225 in 10-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
759In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
635In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.316 in 0.5 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
10.021In 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
10.453In 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, BRASS
Datasheet
161In Stock
12.000On Order
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.05 mm 3.81 mm 5.56 mm M3
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1.556In 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
972In Stock
10.000Expected 9/29/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 3.23 mm 4 mm 3.73 mm M2
SI Mounting Fixings HI-TORQUE INSERT
Datasheet
23In Stock
20.000On 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 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 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 HI-TORQUE INSERT, STAINLESS
Datasheet
161In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
419In Stock
10.000Expected 5/27/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 5.72 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
1.625In Stock
10.000Expected 7/16/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.99 mm 4.75 mm M2 Bulk
SI Mounting Fixings ISC-M5 DBL ENDED NUT
Datasheet
110In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 6.4 mm 9.52 mm 7.01 mm M5
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
1.035In 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
1.149In Stock
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
784In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
113In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1.365In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
5.463In Stock
78.000On Order
Min.: 1
Mult.: 1

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


SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
316In Stock
10.000Expected 9/11/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.28 mm 7.92 mm 6.35 mm M4