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 (JPY) 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, BRASS .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
14In 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
3,993In Stock
10,000Expected 11/27/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Hardware HI-TORQUE INSERT, BRASS 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
119In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 7.62 mm M6
SI Mounting Hardware HI-TORQUE INSERT, BRASS 12.70X9.50 M8 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
2,976In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 9.6 mm 12.7 mm 10.31 mm M8
SI Mounting Hardware 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 Hardware ULTRASONIC INSERT, BRASS
Datasheet
1,102In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.199 in 0.15 in 0.219 in 6-32
SI Mounting Hardware 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 Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
5,924In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.118 in 0.115 in 0.141 in 2-56
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
380In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.189 in 0.15 in 0.21 in 6-32
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
8,593In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.05 mm 3.81 mm 5.56 mm M3
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, ALUMINUM 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
364In Stock
10,000Expected 10/30/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 4.01 mm 3.43 mm M3
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
131In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.223 in 0.321 in 0.243 in 8-32
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
1,644In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.468 in 0.5 in 0.509 in 3/8-16
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
925In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.488 in 0.625 in 0.563 in 3/8-16
SI Mounting Hardware 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 Hardware ULTRASONIC INSERT, BRASS
Datasheet
919In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.523 in 0.375 in 0.563 in 3/8-16
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1,160In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 10.19 mm 14.27 mm 11.91 mm M8
SI Mounting Hardware 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 Hardware HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
11,575In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.18 mm M2
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
33,757In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 5.74 mm 4.55 mm M2.5
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
9,605In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 6.43 mm 5.72 mm 6.93 mm M5
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4,725In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.03 mm 7.62 mm 8.69 mm M6