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 (INR) 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, ALUM
Datasheet
481In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1,330In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.246 in 0.375 in 0.297 in 10-32
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
1,015In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
46In Stock
10,000Expected 14-07-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.58 mm 5.56 mm 4.37 mm M2.5
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
2,315In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.141 in 0.219 in 0.172 in 4-40
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
594In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
253In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.127 in 0.157 in 0.147 in 2-56
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
659In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, ALUM
Datasheet
1,710In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Fixings HI-TORQUE INSERT
Datasheet
1,574In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 5.74 mm 4.55 mm M2.5
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
47In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.43 mm 5.72 mm M5
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
194In Stock
10,000Expected 17-07-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,298In 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
6,039In Stock
3,000Expected 13-07-2026
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 ISC-0420 DBL ENDED NUT
Datasheet
13,412In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 0.315 in 0.5 in 0.338 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
915In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.431 in 0.335 in 0.469 in 5/16-18
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
1,654In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.468 in 0.5 in 0.509 in 3/8-16
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
5In Stock
10,000Expected 29-06-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.218 in 4-40 Bulk
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
10,228In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.185 in 0.25 in 0.219 in 6-32

SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
11,118In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
9,805In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.189 in 0.281 in 0.21 in 6-32
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS STEEL 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
10,120In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 3.43 mm 4.55 mm M3
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
35,557In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M2.5