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 (CAD) 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 ISC-440 DBL ENDED NUT
Datasheet
774In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 0.157 in 0.226 in 0.182 in 4-40
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
992In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.321 in 0.5 in 0.375 in 1/4-20
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
949In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1,319In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1,219In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1,425In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.208 in 0.312 in 0.25 in 8-32
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
757In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
4,535In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.141 in 0.219 in 0.172 in 4-40
SI Mounting Hardware HI-TORQUE INSERT, BRASS .150X.183 6-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,531In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.189 in 0.15 in 6-32
SI Mounting Hardware HI-TORQUE INSERT, BRASS 3.18X3.07 M2 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
4,400In Stock
10,000Expected 2026-04-14
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 3.23 mm 3.18 mm M2
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
1,856In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.01 mm 5.74 mm 4.55 mm M2.5
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
2,155In Stock
10,000Expected 2026-07-03
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.67 mm 8.15 mm 7.14 mm M4
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
604In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.7 mm 6.35 mm 5.56 mm M3
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
620In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.06 mm 11.1 mm 8.33 mm M5
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
1,542In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.81 mm 7.14 mm 5.33 mm M3.5
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
1,640In Stock
2,000Expected 2026-03-20
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
948In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 7.62 mm M6
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
1,310In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 10.19 mm 14.27 mm 11.91 mm M8
SI Mounting Hardware ULTRASONIC INSERT, ALUM
Datasheet
938In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
1,025In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.246 in 0.375 in 0.297 in 10-24
SI Mounting Hardware HI-TORQUE INSERT
Datasheet
1,207In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.67 mm 8.15 mm 6.17 mm M4
SI Mounting Hardware HI-TORQUE INSERT, ALUM
Datasheet
480In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.03 mm 12.7 mm 8.69 mm M6
SI Mounting Hardware HI-TORQUE INSERT, ALUMINUM 7.62X7.87 M6 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
544In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 8.03 mm 7.62 mm M6
SI Mounting Hardware HI-TORQUE INSERT, BRASS .225X.247 10-32 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
837In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.225 in 10-32
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
415In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.316 in 0.5 in 0.342 in 1/4-20