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 ULTRASONIC INSERT, BRASS
Datasheet
21In Stock
10,000Expected 2026-09-18
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
2,491In Stock
10,000Expected 2026-08-13
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.74 mm 4.7 mm 6.35 mm M4
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, ALUM
Datasheet
1,211In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 6.43 mm 9.52 mm 6.93 mm M5
SI Mounting Hardware ULTRASONIC INSERT, ALUM
Datasheet
1,426In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
8,097In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.185 in 0.25 in 0.219 in 6-32
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
785In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.15 mm 12.7 mm 9.52 mm M6
SI Mounting Hardware ULTRASONIC INSERT, STAINLESS
Datasheet
5,267In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.153 in 0.135 in 0.172 in 4-40
SI Mounting Hardware TAPERED THRU THREADED INSERT M2X0.4 STAINLESS STEEL
Datasheet
2,161In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3 mm 2.92 mm M2
SI Mounting Hardware HI-TORQUE INSERT, ALUMINUM 4.70X5.51 M4 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
953In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 5.67 mm 4.7 mm M4
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
958In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.375 in 0.273 in 10-32
SI Mounting Hardware HI-TORQUE INSERT, BRASS .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
8,492In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.135 in 4-40
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS STEEL .135X.152 4-40 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
746In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.158 in 0.135 in 0.179 in 4-40
SI Mounting Hardware HI-TORQUE INSERT, BRASS
Datasheet
8,636In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.158 in 0.226 in 0.179 in 4-40
SI Mounting Hardware HI-TORQUE INSERT, BRASS 3.43X3.86 M3 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
8,254In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.01 mm 3.43 mm M3
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
1,184In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 0.253 in 0.375 in 0.273 in 10-32
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
710In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
7,298In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
7,941In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.78 mm 5.72 mm 7.54 mm M5
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
682In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 7.7 mm 6.71 mm 8.33 mm M5
SI Mounting Hardware HI-TORQUE INSERT, BRASS 5.72X6.27 M5 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
1,211In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 6.43 mm 5.72 mm M5
SI Mounting Hardware ULTRASONIC INSERT, BRASS
Datasheet
1,873In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Hardware HI-TORQUE INSERT, STAINLESS
Datasheet
939In 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
1,900In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.86 mm 7.62 mm 9.52 mm M6
SI Mounting Hardware 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