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 (GBP) 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, BRASS
Datasheet
6Expected 18/05/2026
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
729,439Factory Stock Available
More Info Available
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Brass 0.141 in 0.219 in 0.172 in 4-40
SI Mounting Fixings HI-TORQUE INSERT, BRASS
Datasheet
7,996Expected 24/04/2026
Min.: 1
Mult.: 1

Inserts Threaded Insert Brass 8.03 mm 12.7 mm 9.53 mm M6 Bulk
SI Mounting Fixings ISA-0420 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.315 in 0.5 in 0.338 in 1/4-20
SI Mounting Fixings ISA-256 DBL ENDED NUT ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.126 in 0.157 in 0.151 in 2-56
SI Mounting Fixings ISA-440 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.157 in 0.226 in 0.182 in 4-40
SI Mounting Fixings ISA-632 DBL ENDED NUT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.188 in 0.281 in 0.215 in 6-32
SI Mounting Fixings ISA-832 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 0.221 in 0.321 in 0.245 in 8-32
SI Mounting Fixings ISA-M3 DBL ENDED
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 3.99 mm 5.74 mm 4.62 mm M3
SI Mounting Fixings ISA-M5 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 6.4 mm 9.52 mm 7.01 mm M5
SI Mounting Fixings ISA-M6 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Aluminum 8 mm 12.7 mm 8.58 mm M6
SI Mounting Fixings ISB-032 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Brass 0.252 in 0.375 in 0.276 in 10-32
SI Mounting Fixings ISB-440 DBL ENDED NUT
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Brass 0.157 in 0.226 in 0.182 in 4-40
SI Mounting Fixings ISB-632 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Brass 0.188 in 0.281 in 0.215 in 6-32
SI Mounting Fixings ISB-M6 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Brass 8 mm 12.7 mm 8.58 mm M6
SI Mounting Fixings ISC-032 DBL ENDED NUT
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Stainless Steel 0.252 in 0.375 in 0.276 in 10-32
SI Mounting Fixings ISC-256 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Stainless Steel 0.126 in 0.157 in 0.151 in 2-56
SI Mounting Fixings ISC-832 DBL ENDED NUT
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Screws & Fasteners Nut, Double Ended Stainless Steel 0.221 in 0.321 in 0.245 in 8-32
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.267 in 0.225 in 0.297 in 10-24
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.349 in 0.3 in 0.375 in 1/4-20
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.321 in 0.5 in 0.375 in 1/4-28
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.488 in 0.625 in 0.563 in 3/8-16
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.118 in 0.115 in 0.141 in 0-80
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.107 in 0.188 in 0.141 in 0-80
SI Mounting Fixings ULTRASONIC INSERT, ALUM
Datasheet
Non-Stocked
Min.: 10,000
Mult.: 1,000

Inserts Threaded Insert Aluminum 0.118 in 0.115 in 0.141 in 2-56