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.

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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 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 Fixings 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
SI Mounting Fixings ISC-M4 DBL ENDED NUT
Datasheet
430In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Stainless Steel 5.62 mm 8.15 mm 6.22 mm M4
SI Mounting Fixings ISC-M5 DBL ENDED NUT
Datasheet
85In 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
694In 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
484In 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
1,265In 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
2,847In 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 11-09-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.28 mm 7.92 mm 6.35 mm M4
SI Mounting Fixings HI-TORQUE INSERT, ALUMINUM .300X.310 1/4-20 THREAD ULTRASONIC HEAT STAKING DIAGONAL
Datasheet
615In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Aluminum 0.316 in 0.3 in 0.342 in 1/4-20
SI Mounting Fixings HI-TORQUE INSERT, STAINLESS
Datasheet
2,123In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 4.81 mm 7.14 mm 5.33 mm M3.5
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
351In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 4.81 mm 7.14 mm 6.35 mm M3.5 Bulk
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,300In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 10.19 mm 14.27 mm 11.91 mm M8
SI Mounting Fixings ISA-032 DBL ENDED NUT
Datasheet
986In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Aluminum 0.252 in 0.375 in 0.276 in 10-32
SI Mounting Fixings ISA-M4 DBL ENDED NUT
Datasheet
400In Stock
Min.: 1
Mult.: 1

Screws & Fasteners Nut, Double Ended Aluminum 5.62 mm 8.15 mm 6.22 mm M4
SI Mounting Fixings ULTRASONIC INSERT, BRASS
Datasheet
679In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.246 in 0.375 in 0.297 in 10-24
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
3,252In Stock
10,000Expected 02-11-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 3.89 mm 3.43 mm 4.37 mm M3
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
1,135In Stock
10,000Expected 23-10-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 5.74 mm 4.7 mm 6.35 mm M4
SI Mounting Fixings ULTRASONIC INSERT, STAINLESS
Datasheet
5In Stock
10,000Expected 28-08-2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Stainless Steel 8.15 mm 12.7 mm 9.52 mm M6
SI Mounting Fixings HI-TORQUE INSERT
Datasheet
447In 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
406In Stock
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 0.253 in 0.225 in 10-32